Do Electric Heaters DRY AIR?!

  • Published on Jan 17, 2022
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    By: Mehdi Sadaghdar
  • Science & TechnologyScience & Technology

Comments • 5 157

  • hiddenlawyer
    hiddenlawyer 4 months ago +4064

    Direct nuclear powered heaters would be the way to go. You would not only get the heat from the decaying heavy metal, but the water vapor from the tank would also contribute to humidity. It can be used to heat your water as well. Just gotta figure out how to dispose of the depleted materials...

    • fbi agent miyako hoshino
      fbi agent miyako hoshino 5 days ago

      inb4 something goes wrong

    • Reese Martin
      Reese Martin Month ago

      Give it to Gordon Ramsay he'll make a amazing dish with it.

    • Chaos insurgency.                            or CI
      Chaos insurgency. or CI 2 months ago

      Several other problems though one how would you contain the radiation a.k.a. decay two how would you regulate the amount of heat it was producing without a ridiculously large cooling system three assuming that the heat somehow doesn’t melt it how do you control the amount of you going into the air because if it gets too hot they can catch stuff on fire

    • xxknowsbest
      xxknowsbest 2 months ago

      Man's a genius

    • Jericho Samurai
      Jericho Samurai 2 months ago

      Just toss it in the trash. Ez.

  • Greg Weaver
    Greg Weaver 3 months ago +149

    This misconception probably came from air being dryer in the winter, when electric heaters are used.
    It's actually kind of the opposite--we use electric heaters to dry pyrotechnic mixtures and 3d printer filament, because it raises the the humidity holding potential of the air by heating it, so it pulls moisture out.

    • CambridgeMart
      CambridgeMart 2 months ago +3

      Agree, but that does mean the relative humidity falls when it's heated by a dry heat, e.g. a resistive heater

  • Dcyde86
    Dcyde86 3 months ago +36

    Oh man , I love what you do here . I wish all of our professors explained things in the most unique way like you do, back in time. One of a kind! Love from Athens,Greece

  • oditeomnes
    oditeomnes 3 months ago +30

    Switched from some ancient heater to a brand new one: Noticed the percieved humidity difference and better air quality, so I assume the new one does not burn layers of old dust on the elements at all times.

    • RussianGuyovitch
      RussianGuyovitch 3 months ago +3

      At least not yet. Give it a couple years and the dust will get in there

  • Epohje
    Epohje 3 months ago +13

    I liked it, I am an electrician and I had this thought that open resistor heaters would dry air more than closed ones like water heaters and I really had not thought about it before. Good video.

  • Jaime Ortega
    Jaime Ortega 4 months ago +706

    Hey could you do an "ElectroBROOM?" Basically a broom that is statically charged to attract dirt, dust etc. and then a De- static process to release it?

    • Sean Krake
      Sean Krake 3 months ago

      @Rabbit the One he would probably spend more time talking about the theory of electrostatic precipitation.

    • Ádám Eszes
      Ádám Eszes 3 months ago


    • Digital Advancements
      Digital Advancements 3 months ago

      Genius idea 😂 electro broom I would buy.

    • Angel Tick
      Angel Tick 3 months ago

      @apple memes boom!!! did u just tell me to stop being depressed?

    • apple memes boom!!!
      apple memes boom!!! 3 months ago

      My friend jesus is coming sonn jesus loves you! preach the gospel of jesus with your friends and family members and tell them to fast pray and read bible,stop sinning dont watch tv,makeup,adultery,eating too much,lying,anger,depression

  • Colin Gladfelter
    Colin Gladfelter 3 months ago

    I love how good your videos always have been and still are, keep it up brother 💪🏼

  • Michael Imbesi
    Michael Imbesi 4 months ago +11

    I think it might also have to do with the fact that the electric heating elements are much hotter than the air coming through a central heating system or a steam radiator. So the air coming off of it is a higher temperature until it mixes with the air around it. So the air immediately next to the electric heater has a much lower relative humidity than the surrounding colder air. It evens out when they mix, but because the air coming out of the heater *feels* drier, people think it is drier.

  • Semih Koray Ozkan
    Semih Koray Ozkan 3 months ago +13

    Some Electric heaters (specially infrared ones started become famous around year 1990~2000 ) has a small water tank to boil water to create humidity. That additional feature might people think that electricity makes air dry.

  • Francisco Malheiros
    Francisco Malheiros 3 months ago +2

    Obrigado por seus ensinamentos! Top, seu canal é top!

  • Dean McIsaac
    Dean McIsaac 4 months ago +634

    Alright, he does the whole "accidently gets electrocuted" bit in nearly every video. But him kissing the wire still got me.

    • aditsu
      aditsu 4 months ago

      How the fork is this man still alive? 😂

    • TeslaRock
      TeslaRock 4 months ago

      @b3l14l Because it was in the script :)

    • Russell Wheeler
      Russell Wheeler 4 months ago

      @Kevin Turner wait, these things aren't actually happening to him? they're props/staged?!?! Next you'll be telling me Santa doesn't exist!

  • Qwerbey
    Qwerbey 3 months ago

    I always heard this too, but as soon as I saw the title, it made me think about it more and I ended coming to mostly the same conclusion as you. Your explanation makes a lot of sense, but it does make me wonder if hot water radiators somehow leak water vapor, making them seem less dry?

  • Trevor Lambert
    Trevor Lambert 3 months ago +1

    Have to disagree on one point, when he says that equal RH feels the same regardless of temperature. This might be true over a narrow range of room temperature, it doesn't hold true at extremes. When it's very cold, the air feels dry no matter what. If it's well below freezing, the moisture holding capacity is slow it might as well be nonexistent.

  • Joe blow goes
    Joe blow goes 3 months ago +2

    Just thinking about this video (haven't watched it) brings back memories of figuring out the volumetric flow of water leaving an air conditioner in thermo 2... horrible horrible times

  • CheeTaH Gaming
    CheeTaH Gaming 3 months ago

    The amazing thing of this channel is, I pass the test because of it, thanks. I understand everything that you teach about electricity.

  • Lars Lindgren
    Lars Lindgren 4 months ago +142

    I have assumed that it is the smell/irritation from burnt dust on hot electric heaters that is confused with dry air. Many modern electric heaters don't have exposed really hot surfaces and should be better on that regard.

    • N Fels
      N Fels 4 months ago +6

      You're correct. Also all the people saying this in my experience, are 50+ years old, indicating it's a generational thing and old designs could play a role.

  • Learn with Amogh
    Learn with Amogh 3 months ago +2

    Hello Sir! I am Amogh here from India. I like your channel very much. You teach and explain and do sort of experiments to help us understand. I liked this video very much!!!
    May your subscribers count go high as much as it can!!!!! 😄😄

  • Suppressed Knife
    Suppressed Knife 2 months ago

    First time seeing your channel, wow i love the energy! it is funny while still being informative. Thanks for making content, i subbed ofc!

  • Edoardo Coppa
    Edoardo Coppa 4 months ago +5

    A small difference could be caused by the fact that electric heaters usually have much higher temperatures of the elements than normal water heaters which, usually, in Europe, are, I think, around 60-65 C. Technically, following what you say in your video, in the region closer to the elements more humidity is absorbed by the much hotter air, therefore reducing the humidity of the rest of the room. The gradient of the temperature is however very steep and the region is small as the difference in relative humidity in the room. It would be interesting to see if radiative heating plays also a role into this.

    • Thingaloo
      Thingaloo 18 days ago

      @Emre Yucel state transitions can have latency, as in, the threshold can be lower going down and higher going up

    • Emre Yucel
      Emre Yucel 4 months ago

      The only way to remove moisture from the air is to lower the temperature. If you make the air very cold, the moisture will precipitate out of the air. Restoring the temperature after that will give you air with much lower humidity. That's how dehumidifiers work, with cooling coils.

    • Emre Yucel
      Emre Yucel 4 months ago

      The moisture does not get removed from the air when heating the air. Even if you bring the air from -20 Celcius to blistering 500000 degrees, and then back down to room temperature, it would still have exactly the same amount of relative humidity that you'd get if you gently brought it to room temperature without visiting the temperature extreme.

  • Nate G
    Nate G 3 months ago

    Anyone who works in hvac should know this already. Although I've had other hvac "techs" tell me that electric heaters dry air out... sooo. Its why your house feels so dry in the winter. You take cold air with already low capacity to hold moisture and then you heat it, further reducing relative humidity.

  • Scott's Synth Stuff
    Scott's Synth Stuff 4 months ago +414

    I suspect this myth comes from the fact that most HVAC forced-air furnaces also have a humidifier on them, to make up for the drop in relative humidity caused by the increase in temperature. Electric baseboard heaters have no such humidification system, obviously. Although I suppose you could just pour a jug of water into the baseboard heater to add humidity. Perhaps you could test this. :)

    • William R Somsky
      William R Somsky 4 months ago

      The house I grew up in had a forced air furnace with a humidifier. Each year, we would change the air filters and replace the humidifier plates (fibrous plates that wicked water up into the air flow).

    • rebeuh sin
      rebeuh sin 4 months ago

      @Brandon I Actually those that called ventless are designed just that and the humidity is a feature. Still I do not trust mine. Obviously these are gas not fuel oil.

    • rebeuh sin
      rebeuh sin 4 months ago

      @Brandon I Yes, but some are better then others. Ventless gas fireplace insert are safe, provided they are working perfectly and you have a co detector. But I afraid to use mine much.

    • VirtualTools_
      VirtualTools_ 4 months ago

      @Robert Pendzick it can be if you bury it and wait long enough

    • not bob
      not bob 4 months ago

      @Scott's Synth Stuff in america (live in the north) i have seen many gas furnaces, and have never seen a humidifier built into one

  • Saeed Rasooli
    Saeed Rasooli 3 months ago

    This was one of the funniest videos! It was also educational (I'm a software developer but I was never very good at electrical circuits or electronics! When I see a circuit with 4 of 5 elements, I'm already confused).

  • whitescar2
    whitescar2 3 months ago +1

    By increasing the air temperature, the relative humidity decreases even though the absolute humidity is the same. As such, the air will be able to absorb more moisture (from your eyeballs, etc.) which is what we tend to perceive as "dry air". The same space, with the same total amount of humidified air, but a few degrees colder, would thus appear to us as being less dry.
    As such, it is perfectly ok to say that heaters (not only electric, but any heaters in general) dry air.
    However-however, when using things like gas burners, if the exhaust gasses are also vented inside (not advisable) that exhaust contains water from the hydrogen part of the hydrocarbon burning. As such, exhaust from a gas heater will increase the absolute humidity in the space it heats while the electric heater will not. As such, in some ways, it could be said that electric heaters dry air (whereas combustion heaters do not).

    • seebee
      seebee 3 months ago

      bravo 🤓🥳

  • celestial Pegasus
    celestial Pegasus 4 months ago +12

    Dearest Electroboom,
    Indeed it is a pleasure for me to share my knowledge of how electric heaters drain away the moisture from air, or in sinpler words, how an electric heater dries air.
    The conducive nature of air particles roaming freely in the system without the associated bedlam brought about by the flow of electrons in the metal threads of the energy transmission system constitutes equilibrium. However, because of the presence of free energy in the realm of atmospheric radiation, on contact with these energy drivers of the heater element, you provide the free energy sources with your additional input. Now, do understand that this free energy is ideally suited for a dimension beyond the one we currently live in, and the portal opened by the use of the electric heater invites those free energy to our dimension, disrupting the statement of energy being constant in our universe, (in this case, in our dimension). Hence, the equilibrium is set by sending the humidity or H2O molecules to the dimension to which the stated portal was opened to.
    As a result, the balance of the dimensions and their individual energy states finally find equilibrium again.
    Hope this helps, have a nice day ahead.
    Kindest regards.

  • ehu42
    ehu42 4 months ago +1

    Growing up in Winnipeg, we had a low efficiency gas furnace. It had a fresh air vent as it consumed air in the house during combustion. Drawing in -30C air will very quickly dry out the house, so the furnace had a 'whole house' humidifier in the plenum after the furnace to rehumidify the air. I wonder if some people would swap out the gas furnace for electric baseboards would also throw out the humidifier. Houses back then were not as air tight as they are today, and combined with the still present fresh air vent for the furnace would lead to the moist air being eventually replaced with dry outside air and therefore the house would feel dry.
    These days, swapping out a low-e furnace for electric or high-e ends up resulting in way too much humidity as houses are better sealed. So we often have install HRV units to vent moist air out and bring fresh dry air in.
    You could do a video on them - they are quite fascinating.

    • Alex Smith
      Alex Smith 27 days ago

      My family moved to Winnipeg in 2006 and as far as I can remember we’ve never had a house with a low-efficiency furnace. I never knew they were that much worse with dry air than the newer ones lol

  • NightHawkInLight
    NightHawkInLight 4 months ago +522

    I hadn't thought about it before, but ventless propane/gas heaters probably give better humidity regulation than other forms of heat, since you get water as part of the combustion products vented into the room. I'll have to check humidity running my ventless propane vs my wood stove. Usually I throw a cup of water on top of the stove to push humidity up.

    • Sir Santi
      Sir Santi 2 months ago

      @Mojave Artifact Hunters Ohhh yeah it is, I was thinking Hypoxia

    • Mojave Artifact Hunters
      Mojave Artifact Hunters 2 months ago

      @Sir Santi no Apoxia IS altitude sickness, why are you arguing with me look it up I'm not crazy.

    • Sir Santi
      Sir Santi 2 months ago

      @Mojave Artifact Hunters I mean apoxia is just lack of oxygen, not necessarily an altitude thing, however breathing high CO2 concentrations is indeed a different disease

    • Mojave Artifact Hunters
      Mojave Artifact Hunters 2 months ago

      @Sir Santi You mean hypercapnia, no one said anything about altitude sickness...

    • Sir Santi
      Sir Santi 2 months ago

      @boomchacle CO is what’s made when there isn’t enough oxygen, CO2 is what’s made when there is. You can see it in the chemical formula, there is 2 oxygens per carbon when there is a substantial oxygen supply, and only 1 when there isn’t quite enough

  • MrMegaPussyPlayer
    MrMegaPussyPlayer 4 months ago

    2:20 Red glowing Iron rusts when it comes in contact with water vapor. Releasing H₂. (Which is removing water)
    However, heating the "dries" it by reducing RELATIVE humidity, since hot air can hold more water. Though, it doesn't hatter how it is heated. Only how much … unless we are talking about fire, and it's by products.

  • GBWM - Welding Machining CNC

    Great video! I love the way you pass the knowledge!

  • Arthur Oliveira
    Arthur Oliveira 3 months ago +1

    Great content, as always! Just by curiosity, do you really get hurt/burn from making your videos? If you can, make a video about it plz!

  • TheOtisUpham
    TheOtisUpham 3 months ago

    I'm always so curious how in control of these shorts you are. That glass breaking is crazy.

  • Quba
    Quba 4 months ago +324

    Actually, it is a vapour pressure deficit (VPD) that we feel as air moisture (or dryness). VPD is sometimes called a drying strength of atmosphere, because animals and plants directly respond to changes in VPD value, but not necessarily to relative humidity change.
    VPD is a difference between the amount of moisture air can hold (saturation vapour pressure) and the actual amount of moisture that air holds (vapour pressure), while relative humidity is a ratio of those two quantities. Because saturation vapour pressure is exponentially dependent on air temperature relative humidity is actually a measure much more complex to understand than VPD. But someone at some point decided that whole world will use RH.
    The "optimal relative humidity" works mostly for room temperatures in which range similar RH results in similar VPD. But in low temperatures changes in humidity are much less noticeable for humans, because change in relative humidity results only in slight change in air moisture.
    Even comparing a room at 50%RH & 15C to a room at 50%RH & 25C, most people will notice that actually the second one has drier air (even though they both have the same RH). That is because the second room has higher VPD.
    And the effect of VPD is even more visible in plants. Greenhouse owners in last several years started monitoring VPD alongside RH, which allowed them to provide better conditions for their plants.
    To be clear, I am not writing this to point out any mistakes in the video. It is great as always and reasonably accurate because electric heaters mostly work in rooms. Just wanted to share some knowledge many people might have not known.
    Thanks for coming to my Ted Talk.

    • Spruce_Goose
      Spruce_Goose 3 months ago

      @Leo Curious I think we're pretty close to on the same page at this point. Interactions at the 'boundaries' of the human body are pretty complex, and I doubt either of us have it nailed down completely here in these comments. Wind, for example, is a HUGE factor on the rate of drying, and neither RH nor VPD tells us the proportionality of that effect.
      I should reiterate that I am assuming we are discussing the usefulness of being given *only one* metric. If we assume we are given multiple pieces of information that cross lines on the psychrometric chart (like temp and RH), it’s true that it really doesn’t matter whether we are dealing with RH or VPD. If we have RH *or* VPD *and* temperature, we have a POINT on the psychrometric chart, thus we have all the information we could ever want.
      VPD tells us something different than RH when it is the lone metric (implying temperature is variable). It tells us something more relevant to drying rates; we simply need to account for the environmental changes that happen at the human boundary layer.
      I see now what you mean that RH and VPD are proportional for a given temperature, but I’m still not sure what the implication is? We can move temperature to one axis (make it variable) and RH to another, and see the VPD plot is not linear. If RH remains constant but temperature changes, we will have a different VPD and the change is not linear.
      More to the point, if the *only information* we have is RH, we are blind to the effects of VPD as *changes in temperature* occur. And a change in temperature is exactly what happens when vapor nears a heated object like a body. We are almost best dealing simply with the absolutes (i.e. the actual vapor pressure and the saturation vapor pressure). It is the difference between those absolutes, not the ratio, that gives us the rate of molecular movement.
      This is what I am getting at when I say “…more closely related to the concept of VPD than RH, only with a temperature shifting component due to heating from the body.” You point out that there can only be one VPD at one RH for a given temp, and that is absolutely true, but temp is not ‘given’ (not static) if we are discussing the effects of environmental changes at the skin (or eyes, etc.).
      I’m not sure I’ve communicated this all very clearly, or perhaps I'm still missing your points, but hopefully it makes some sense, and I see a lot of agreement between our points.
      One related note I’ll add is that it is not AIR that HOLDS vapor, but rather vapor exists alongside air in space (see Dalton’s Law of partial pressures). It may be more helpful to consider the hygrothermal effects on the human body in terms of energy states and the interaction of the human body with a dynamic environment in which water molecules readily change states. Concepts like saturation vapor pressure (which defines things like RH and VPD) is a statistical phenomena that gets applied as a tool to larger spaces. It's not the 'truth' on a micro scale, which varies with tiny fluctuations in energy.
      The usefulness of any single metric given to us by distant measuring devices is certainly very limited.

    • Leo Curious
      Leo Curious 3 months ago

      ​@Spruce_Goose With 1) I was refering to what you write befor 1).
      2) Yes, its not always/everywhere 37 °C, its always different. Lets call it the local body/skin temperature.
      3) Exactly. The difference (or quotient) of surrounding air condition to a theoretical 100 % RH (or 0 VDP) condition at/near the skin is what dictates how much "drying effect" the air has.
      4) I dont think cold air is any "dryer" for us compared to the same air beeing heat up beforhand. Only with breathing, as explained above, I expect our body to react different and thus the warm air feels dryer in the nose/eyes/wherever since the body fails to release the same amount of water it would if the air was still cold.
      5) Hm? There can only be exactly one VPD at one RH for any given temperature. They are directly correlated and proportional. If you plot VPD over RH for eg. 0 to 100 °C you will see exactly one line which I would expect to be shaped like p_H2O_sat over T.
      Great that we can actually have a discussion here.

    • Spruce_Goose
      Spruce_Goose 3 months ago

      @Leo Curious I think I see what you are getting at. There are boundary conditions at the skin layer (or mucous membrane, etc.) that are not the same as the ambient air.
      When air of a certain absolute vapor content comes into contact with a warm human body, it is warmed, thus it's RH and VPD are changed from the ambient measurement.
      I would like to make a few notes:
      1) This IS related to the absolute vapor content. Absolute vapor content is not the same as saturation, so your statement "as well as the relation to the absolute water content it would have at 37 °C (so saturation pressure at 37 °C)" doesn't make any sense to me.
      2) Boundary conditions are not the same as internal body temperature, so using 37C would not be that accurate most of the time.
      3) What you are positing now is not what you have said in your previous replies. I think it has made the most sense out of what you have said to date in this thread, however. The key is that RH and VPD are both temperature dependent, and because the human body generates heat, the ambient measurements are not truly accurate. This would suggest that the ABSOLUTE moisture content does have some bearing (beyond RH and VPD) and would also explain why COLD AIR which has lower absolute moisture contents would have significant drying effects.
      4) These drying effects would remain, however (and even increase), if that same cold dry air was heated. In that scenario, the absolute moisture content would still be extremely low, but RH would decrease / VPD increase. This is why old leaky houses that heat up the cold outside air can be extremely dry.
      5) None of this supports the assertion that VPD and RH are 'proportional' or the same metric. In fact, I would argue that your latest hypothesis is more closely related to the concept of VPD than RH, only with a temperature shifting component due to heating from the body. I think RH would still be slightly less informative in this case since the ratio expression doesn't properly account for the vapor budgets as temperature profiles shift.
      I suspect we may be getting closer to the same page, but who know. Cheers.

    • Leo Curious
      Leo Curious 3 months ago

      @Spruce_Goose Quba says its VPD that we feel (thus Electroboom should not have used RH for this). But thats not correct, as I described. Its neither VPD nor RH. Its the temperature of the air as well as the relation to the absolute water content it would have at 37 °C (so saturation pressure at 37 °C) either expressed as a VPD or RH.

    • Spruce_Goose
      Spruce_Goose 3 months ago

      @Leo Curious I just re-read the thread starter and no where do they say 'vpd is better.' in fact, they give quite a nuanced and detailed overview as to the difference. Your latest comment appears to be summarized by 'humans are affected by more than one parameter.' (that's a generous summary). That notion should go without saying. No two points on the psychrometric chart will affect humans exactly alike.
      At this point, I honestly don't know what you're trying to say.
      VPD and RH tells us different things. It's that simple. Use whichever one you feel is most appropriate.

  • Elijah_xXx
    Elijah_xXx 3 months ago

    Imagine if the air is so conductive that the electricity of any device can go to it

  • Griffin Network
    Griffin Network 3 months ago

    Mehdi's sense of humour is awesome so funny. I think Electricboom is the best comedy/learning channel on TheXvid for sure. Amazing job Medhi, Keep up the good work!

  • Timothy Osborn
    Timothy Osborn 3 months ago

    I would expect the relative humidity to go down. Conservation of mass would require the same amount of water before and after passing through the heating elements. Because the air is warmer it has a greater capacity to hold water so it feels dryer.

    • jaco gomez
      jaco gomez 3 months ago

      @Timothy Osborn oh sorry.

    • Timothy Osborn
      Timothy Osborn 3 months ago

      @jaco gomez it was a pre watch prediction. I did watch it I just didn't bother coming back to fix it

    • jaco gomez
      jaco gomez 3 months ago

      i kindly recommend you to watch the whole video.

  • Nuser Mane
    Nuser Mane 2 months ago +1

    Dear Mr. … Boom 🤔
    Can you do an explanation video about inverters as used for solar to grid coupling?
    I was always asking myself, how these „push“ the energy back to grid in-phase, without increasing the voltage.
    Thank you for all your effort with your videos, they are all great!!!
    Cheers 🥂

  • WingMaster562
    WingMaster562 4 months ago +126

    I like this new thumbnail style where it answers the title immediately, and the video expounds on the idea instead. Been calling it anti-clickbait and I love it.

    • Sayyid sahal
      Sayyid sahal 4 months ago

      @Sonic Cookie bait still can be consumed to some degree, so click bait means 5 percent of video will be its thumbnail.

    • Sonic Cookie
      Sonic Cookie 4 months ago +3

      @Alfredo Arias Technically clickbait is only titles and thumbnails that suggest something that never happens in the article or video, but the word has definitely been used for more than that for a while now so I’ll let you decide whether you’re a dictionary purist or not.

    • WingMaster562
      WingMaster562 4 months ago +4

      @Sayyid sahal you need to broaden your choice of channels then. Despite the mess that is youtube, there are still lots of good people and channels with little to no baits.

    • WingMaster562
      WingMaster562 4 months ago +5

      @Alfredo Arias indeed, though I never said it wasnt clickbait. Hear me out. My reasoning for the "anti-clickbait" is that it is a clickbait that goes against the core philosophy of clickbait. Where a traditional clickbait 1. gets your attention with the thumbnail and title 2. Witholding the answer/topic until the very end of the video or just never addressing it. But an anti-clickbait 1.gets your attention with the thumbnail and title 2.immidiately addresses it in the title/thumbnail.
      Much like computer anti-virus to computer virus, or antichrist to christ. Two similar things but contradicting each other.
      Then again that's just my made up word. Im no proponent of language. So im no position to hold anything

  • Darlypants
    Darlypants 3 months ago

    The explanation of relative humidity was worth the trip. That was great info I didn't know I needed!

  • Omeganinjaboy
    Omeganinjaboy 3 months ago +1

    Perhaps the dryness comes from particulates coming off of the wire (either from the wire itself when heated or resting near the wire) then the hot air rises and blows the particles into the air, much like breathing in dust in an attic makes your throat feel dry. Other heating methods like radiators have an exposed heated surface that is more likely to be cleaned and less likely to build up dust and dirt.

  • Qin Jackie
    Qin Jackie 2 months ago

    Watched this guy since middle school, and now I'm graduated from college, he is still this fun.

  • Joe Paul
    Joe Paul 2 months ago

    I think you touched on where the misconception came from in this video, atleast most of the electric heaters I have encountered have fans built in to circulate the air. Hotter air being circulated drops the relative humidity, which the leyperson would likely attribute to the water being removed from the air rather than from their skin.
    It's a similar thing in reverse for a ceiling fan. I was always told they cool the room as a kid, but when I got older I kinda realized that's ridiculous... There is nothing to take the heat out of the air. Then in high school, I realized the circulation is taking moisture from my skin through evaporation which is why it feels like it is cooling even if the air is the same temperature.

  • Rick Rooney
    Rick Rooney 4 months ago +127

    Perfect timing for this great video! I am teaching my HVAC Apprenticeship students about air balancing and the module includes an introduction to the psychrometric chart. Wonderful discussion about relative humidity. I just linked your video to my students homework for the week. Thank you for all you do, and keep up the excellent work.

    • smallengines_tools
      smallengines_tools 3 months ago +3

      I just came back from a information packed HVAC/heat pump seminar.

  • DeejayXCrypt
    DeejayXCrypt 5 days ago

    Just have huge server rooms in every neighbourhood and use the heat from there. I think we will (as in everyone) eventually need a server setup like this all around.

  • S K
    S K 3 months ago

    Electric heat aside our HVAC does have a condensation pump. I expected it to not run in the winter when not using AC, but to my surprise it does while running the (gas) furnace. I don’t think we have a dehumidifier built in.
    What’s your thoughts?

  • gerat124
    gerat124 3 months ago

    I am an HVAC/R engineer. The moment I read the title, I said to myself "It doesn't make the air drier, it just lowers the relative humidity!" I then pulled up a psychrometric chart before I watched the rest of the video, so seeing you walk through that made me laugh.
    Most people tend to struggle with concepts of heat and mass transfer in real life. One thing that always gets people (even some engineers I have met) is why does most metals feel colder at room temperature than wood? I have heard people actually say it is a lower temperature. All it is is that you don't feel temperature, you feel the rate at which the heat is lost. Same deal with velocity vs acceleration, you can feel acceleration, you have no sense of velocity (otherwise you would feel the earth spinning and hurtling through space at high speeds).
    Also to your question of lies to trick children, I had an uncle that told his kids not to go somewhere or else spiders would eat their eyes and lay eggs in them. One of those kids is in his 30s and he is deathly afraid of spiders to this day. I wonder why?

  • alex elias
    alex elias 4 months ago

    Maybe the moisture content doesn’t change, but the capacity to hold moisture increases so it feels dryer

  • Wild-Life-4x4
    Wild-Life-4x4 4 months ago +132

    It reduces the relative humidity. Temp goes up, absolute humidity stays the same. Gives the impression of drier air

    • Alex Kibbe
      Alex Kibbe Day ago

      @JL Laine Modern ones don't burn inside air. I have one that's only about 6 years old. The furnace is definitely inside but it has ductwork to intake from and exhaust to the outside. Something like 95% efficient.

    • JL Laine
      JL Laine Day ago

      @Alex Kibbe I've seen only one of those; the entire furnace unit sits outside and the ducts runs through the exterior wall into the crawl space. They are less efficient because of the extra long runs for the ducting and the loss of heat leakage to the outside instead of being retained indoors. Most homes have the furnace in the basement or a utility closet inside, drawing indoor air into the combustion chamber and building codes define how 'free air' must be allowed to get to the furnace to reduce the chance of carbon-monoxide accumulating indoors.

    • Steve Jones
      Steve Jones 2 days ago

      That's the same for all heaters.

    • Rondo Cat
      Rondo Cat Month ago

      Yes and ir will dry your skin and other things it heats on the surface... It will not make the air dry but it still makes things it heats up dry.

    • Video Pipeline
      Video Pipeline 2 months ago +2

      @Alex Kibbe "Natural gas heaters intake from the outside and exhaust back to the outside." Standard (~80%) efficiency gas furnaces do not have dedicated combustion air intakes; they draw outside air in through leaks in the building envelope, causing that outside air to mix with indoor conditioned air before being used for combustion and then exhausted out the stack. This doesn't mean "Electric Heaters DRY the AIR" more than a gas furnace however it does mean that if the outside air is very dry, running this type of furnace can reduce indoor absolute humidity slightly.

  • danielle buckley
    danielle buckley 3 months ago

    this man is the reason i got into engineering and messing arround with full bridge rectifiers
    and i have deduced
    heat is hot

  • Stephen Doherty
    Stephen Doherty 2 months ago

    Also, natural/ LP gas heaters (like a Dearborn) produces H2O as a byproduct - over a gallon per 1000,000 btu!
    So comparatively speaking, it is a moist heat that can be perceived as warmer as well.

  • Drew Bossert
    Drew Bossert 4 months ago

    I used to work at a hardware store and at least 10 times a month someone would come in who had a flood in their house asking what kind of heater they should use to get rid of the water. I had my speech on humidification and moisture deposition down to a tee. The customers always ended up leaving with a box fan and a bottle of bleach 😂

  • Arturo Lozano
    Arturo Lozano Month ago

    When you realize He really know what's doing, its even more Impressive the crazy stuff he does.

  • Dave Pin
    Dave Pin 4 months ago +111

    Stroking those friendly wires was clasic, the suggestion to not use such a high voltage in glasses of water was subtle.
    Such a perfect video again.

    • Theodore Thompson
      Theodore Thompson 4 months ago

      You are cool. I was only listening while doing some things. Then I looked at the screen around the time he apologized to the electric wire. Then I was like "what a prop". Then there was big spark. I was like that showed me. Also, don't mess with lady electric she is a feisty one, even if you just came to apologize. Pow!

    • Dave Pin
      Dave Pin 4 months ago

      @Theodore Thompson I guess the subtlety went over the top?

    • Theodore Thompson
      Theodore Thompson 4 months ago

      Don't worry electric live

    • bromiso valum
      bromiso valum 4 months ago +5

      Just as a side-note, synthetic electrolysis is usually performed at the lowest voltage possible, as all excess gets converted into unwanted heat. You use a reference electrode (usually calomel or silver/silver chloride) to adjust the voltage back to just a little over the required voltage for the reaction in your particular system. With good technique you can perform a pretty selective reaction even in a flowerpot (unglazed clay as diaphragm separating anolyte and catholyte).

  • Joel Clark
    Joel Clark 3 months ago

    As heat increases relative humidity decreases and dew point increases. It doesn't dry air but it gives more space for the water in the air making it "drier"

  • Rick Mendoza
    Rick Mendoza 4 months ago

    Hi Mehdi
    I think that if you had included the function of the psychrometric table, the explanation of the subject would have been simpler.

  • EngineerBen
    EngineerBen 4 months ago +1

    All heaters (electric or otherwise) do dry the air due to the increased capacity to hold water as you mentioned. However, there are some forms of heat that also add water into the air and therefore the net result is air that has not been dried as much. What types of heat are you comparing electric heat it with? There are three types of heating systems that I can think of off the top of my head that do add moisture to the air. Steam radiators have a pressure release that can add moisture to the air. Second type is combustion which produces water vapor. If unvented it would add moisture (along with soot and byproducts you really don't want which is why we vent air into the space as you described in our video but that also negates the moisture benefit). Third is forced air. By itself forced air would likely make the air dryer since it typically brings in a percentage of fresh air from outside but some system included a humidifier which would result in less dry air. Steam was pretty common in older buildings and my guess is that is where the 'misconception' comes from. Keep making great videos!

    • zachary carlson
      zachary carlson 2 months ago

      very clear and concise, your comment seems to have mentioned the one type of heating that i think might have caused the whole misconception, steam heaters with a faulty pressure valve venting steam, they arent supposed to do that normally... but i do have one issue with your comment, you referred to "forced air" as a type of heat , but its technically a method of delivery, not all electric heaters have a fan but a majority do and that makes them forced air since they are forcing the air through the heater system with a fan, also in most domestic setups forced air systems are neutral pressure they just recycle air from the living space and dont even have the ability to add fresh air from outside, I do know that commercial systems often have that ability but thats a commercial scale system for creating a net positive pressure in the building, houses dont really do that because of our antiquated thermal efficiency beliefs, maybe im wrong, but ive been around quite a few forced air HVAC systems in residential settings and ive never seen any that mix outside air with inside air.

  • minet dbrogs
    minet dbrogs 3 months ago

    nice topic...i think home heaters should come with a "drier" or humidity monitor lower the heating bill homes well sealed in winter

  • Steen Schütt
    Steen Schütt 4 months ago +68

    My immediate thought was that it was just the relative humidity dropping, as it does, but you also made a good point about electric heaters typically having fans while oil and radiative heaters usually do not.

    • Rentta
      Rentta 4 months ago +5

      Most electric heaters we use here in Finland (usuallly in case of emergency) do not use fans. Still they do make air drier than any form of central heating

  • Garrett
    Garrett 3 months ago

    Hey Mehdi just wanted to say love your videos and to keep up the good work and never change who you are

  • KevMan7302
    KevMan7302 3 months ago

    I knew that the type of heater wouldn't matter, energy is energy after all.. but having said that..
    Not going to lie, I thought that heaters dried the air by displacement, hot air expanding and such.
    Learning about Relative Humidity was great.

  • Branden McKinney
    Branden McKinney 4 months ago

    I always thought it was just the convection and the movement of hot air, like with a hair dryer

  • drukawski
    drukawski 4 months ago +1

    What if your apartment was exclusively heated by the waste heat produced from both dehumidifiers and humidifiers running constantly?
    Technically, Mr. Smartypants, your electric heaters WOULD be dehumidifing the air!

  • Ryan Russell
    Ryan Russell 4 months ago

    Technically speaking, all heaters "dry" air through raising temperature. Relative humidity of hot air is lower for a given value of moisture in the air. An example being (not scientific at all) 50% humidity in 10C air might be 35% in 20c air since hotter air can hold more moisture. Thus by heating the air, you technically dry it by increasing the amount of moisture it could hold.

  • Bruno Ruano
    Bruno Ruano 4 months ago

    Resistance heaters also emits infrared waves which can give you the sensation of dryer skin because it’s heating your skin and not the air. It heats surfaces. That’s the big difference between those sources of heaters

  • Simo_246
    Simo_246 4 months ago

    Question: I have a pellet stove in a room and it makes the air incredibly dry...also everything is covered in static electricity... the stove itself, blankets, the pc case, my mom (she is always in front of it) and also my cats, WHY???

  • nafnist
    nafnist 5 days ago

    The impression of dryer air, comes because the heated air can hold more vapour. Now there's room for more (quicker) evaporation.

  • Benedek Fodor
    Benedek Fodor 4 months ago +120

    If you increase the temperature, not only the relative humidity be lower, but the difference between the inside and outside temperature. This is a problem because water likes to be the same concentration everywhere, and it will literally go through the wall to escape. The temperature difference is directly influences just how much the air moisture wanna go.

    • Benedek Fodor
      Benedek Fodor 4 months ago

      @TheIndomitableSnowman I understand relative humidity, what i was trying to say is if you heat a room the relative humidity will go down, but if its cold outside and not 100% saturated whit water, the absolute humidity is going to drop too.( Of course the relative will drop even more ) I know this because if its -5 out and 22 in the relative humidity is ~37% but if its 5 out it will be 45-50% inside. An other thing is i have learned about this effect, and when designing a house i have to calculate whit this (not to be condensation in the wall).

    • nobodyofnaught2
      nobodyofnaught2 4 months ago +2

      Electric heat does not dry air, however it also doesn't add humidity to the air like a propane or Kerosene heater would one of the byproducts of burning fossil fuels is water.
      A system which keeps the fuel burning air separate from the heated room air there would be no difference.

    • Spruce_Goose
      Spruce_Goose 4 months ago +3

      Vapor diffusion occurs according to absolute vapor pressure. Not temperature, and not RH as said in above reply.
      Vapor pressure is related to temperature, but don't confuse that to mean higher temperature MUST imply higher vapor pressure; it does not.

    • whoCares
      whoCares 4 months ago +1

      whats going on?

    • TheIndomitableSnowman
      TheIndomitableSnowman 4 months ago +9

      @JC MmmBrains I think you and Benedek are confusing heat-induced _pressure_ for having other effects here. Increasing the heat in a volume will DRAW moisture, as hotter air can hold more moisture than cool air. Ergo, increasing the temperature of a volume of air will reduce the relative humidity _because the humidity hasn't changed, but the capacity has increased._ Imagine a glass of water being poured into a much larger glass. Moisture, like everything else, will seek an equilibrium, and thus moisture in higher relative humidity zones will move to lower relative humidity zones, *even if that means moving from a cooler area to a warmer area.* In this way, moisture would actually infiltrate from _outside to the inside_ in your examples. In this sense, you can imagine a series of containers filled with a level of water, and increasing the temperature of one of the containers _lowers the bottom of the vessel._ The water will begin to move from one container to another until they are at the same level again (representing relative humidity), even if that means a great deal more water is in a given container than another. If you were to go far enough, some containers would end up empty (0% relative humidity, or 100% dry air, so to speak).
      Max above me does raise a relevant point that the movement of air from a forced-air system does help facilitate this process of moving air and thus moisture around, but this holds a misconception as well-- the air in a basement cellar might indeed be quite humid, but humidity is again a _relative_ measure. That cool, humid basement air doesn't actually have much moisture in it. It's just very cool, and this means the "floor" of that vessel is very high, so to speak, making that water want to flow out-- or in this case, condense onto things. Circulating the air out of the basement wouldn't generally mean much more moisture is actually being added to the rest of the house, since there wasn't a lot of it in the basement to begin with. There was just a very low _capacity_ for it, making it feel humid. Not to put too fine a point on it, but while an attic may often feel quite dry compared to a basement, the odds are good there is actually more moisture in the attic than the basement, and what you're actually feeling is an even greater temperature gradient creating a lower _relative_ humidity, rather than a lower _absolute_ humidity. Humans, and most other things, feel only the relative part.

  • DenizenKane
    DenizenKane 4 months ago

    Not my misconception, but my wife thought that the pilot light on a gas 'fireplace' was the actual heat source, and the large gas-fueled flames were just for aesthetics.

  • SHS
    SHS 4 months ago

    Just today I argued with my dad on a different but related topic on electric room heaters. He said the room heaters burn and deplete oxygen. And I...I...disagreed.

  • KaneYT
    KaneYT 4 months ago

    I can't wait to see what you will do when you reach 5 million subscribers! That number is coming pretty quickly and I have hope that you can make it before the end of the month.

  • Bart Bols
    Bart Bols 3 months ago

    heating air increases the water absorption of the air, therefore people assumed 'they dry more', hence people think 'the heater dries the air', but its actually the air being able to hold more water, and therefore wet surfaces drying faster.

  • Plasma Channel
    Plasma Channel 4 months ago +562

    Making some adjustments to your filming space are we? Looking great! What's not great are those terrifying snakes....

    • Małgorzata Ciomek
      Małgorzata Ciomek 4 months ago

      Yeah i hate snakes

    • Om3ga Let's Play
      Om3ga Let's Play 4 months ago

      I justa saw you on nate's video comment section lol

    • Darshan Nakum
      Darshan Nakum 4 months ago

      Gentleman make RC(Radio Control Circuit) Please

    • Tune BoyZ
      Tune BoyZ 4 months ago

      dont be scared of sneki u smol baby :)

    • Devin Seeley
      Devin Seeley 4 months ago +2

      at least terrifying snakes dont come and hunt me but terrifying bassoons do

    ARSON 4 months ago

    I love your theatrics. What a perfect way to educate .

  • IntenseGrid
    IntenseGrid 18 days ago

    Also wood stoves and fireplaces usually have fuel inside drying out before use adding moisture to the room.

  • Armand Tamm
    Armand Tamm 3 months ago

    Thank you for the chimney explanation!!! It made me sure that I'm not going insane!!😅😂😂

  • Rhys Morgan
    Rhys Morgan 3 months ago

    I try to explain relative humidity at least once a week at my work. Usually I just get a blank look.

  • LostCoast707
    LostCoast707 4 months ago +141

    I never thought electric heaters dryed the air. I was just always told nautral gas heaters INCREASE humidity.

    • Rust on Wheels
      Rust on Wheels 4 months ago

      @glasslinger I bet it did!

    • glasslinger
      glasslinger 4 months ago

      @Rust on Wheels Built back in the 1930's! Wood frame, off the ground, old sash type windows. Can't use candles there if it is windy outside! Probably saved the old lady's life!

    • Rust on Wheels
      Rust on Wheels 4 months ago

      @glasslinger If the house is drafty enough it will save you 😅

    • glasslinger
      glasslinger 4 months ago

      @Rust on Wheels Sometimes I really wonder. My next door neighbor (92 years old) had one of these in her living room. I could see it burning through the front window. The improperly adjusted tall YELLOW FLAMES that literally spew CO into the air! She didn't die from it, lived to over 100. Beats me!

    • Erkle64
      Erkle64 4 months ago +1

      @Emmanuel Eriksson Exactly, and there exists no other kind of natural gas burning heaters other than the type used in American homes. Also, no other countries exist other than USA.

  • linuxares
    linuxares 4 months ago

    Man I love learning via electric shocks!

  • Santo Pino
    Santo Pino 3 months ago

    I read an article where they gave advice for energy saving.
    Two of there advices I commented where simply legends and are wrong.
    1. Don't switch the heating off for too long, you will waste more energy to bring the room back to temperature than if you leave them always on.
    2. Don't put something on the heater like clothing.

  • kyba74
    kyba74 4 months ago

    Hey ElectroBoom can you please make a video clarifying if a low voltage but very high current can cause a plasma arc in fuses if they are not rated high enough? For example 48v ANL fuse with a big lithium battery for which a short circuit current would be about 5000amps.

  • HB
    HB 4 months ago +1

    Your content is super funny🤣🤣. It always make me laugh in each and every video of yours.

  • Uğurcan SAKIZLI
    Uğurcan SAKIZLI 4 months ago +103

    2:21 is the first time I saw Mehdi really getting surprised at an explosion, that glass could easily hit you in the eye!!!!!!!

  • BlueScreenOfDead
    BlueScreenOfDead 4 months ago

    thank you for doing this stuff, to keep is safe !

  • Vincent
    Vincent 4 months ago

    I was digusted by the red juice that comes out of meat sometimes thinking it was blood. My mother thought the same because when I asked her she said 'it's just spices'. But then years later I learned the juice is just protein disolved in water.

  • malloy stiggles
    malloy stiggles 4 months ago

    Perhaps convection currents in the air cause the moisture to rise, so therefore not disappearing just going into your ceiling

  • Vishva Kumara
    Vishva Kumara 3 months ago

    Before electric heating, it rquired combustion for heating. Clean combustion of most hydrocarbons produce water vapour - but not in direct (combustion-less) heating, incluing electric resistive heating.

  • Iowa599
    Iowa599 4 months ago

    Baseboard heaters warm the walls to heat a room, which encourages the walls to dry. That turns the home into a pile of kindling.

  • Geetam Boruah
    Geetam Boruah 4 months ago +1

    I don't know why, but I love your content because I get knowledge as well as comedy from your videos.

  • TechSeth
    TechSeth 3 months ago +1

    Technology Connections would make a 48 minute video addressing humidity just like how he did so with dishwasher detergent

  • torginus
    torginus 4 months ago

    I mean, electric heaters do dry air in the sense that they increase the amount of moisture air can hold, reducing humidity.

  • LabCoatz
    LabCoatz 4 months ago +176

    Great video Mehdi! Although there might be another piece to the puzzle: combustion-type heaters also RELEASE water vapor. When wood or hydrocarbons burn, they not only produce carbon oxides, but also water vapor, which can increase the humidity of a given space. I know the exhaust from such burners is most often vented outside, but I have met a few not-so-bright individuals who like to light up there 15000 BTU propane heaters indoors without ventilation. Just something that crossed my mind!

    • Brian Leeper
      Brian Leeper 4 months ago

      @NEED2CONNECT I think you completely missed my point. How about this. A house heated by a heat pump won't have air as dry as a house heated with an 80% AFUE furnace which takes combustion air from inside the house.

    • Elvin Haak
      Elvin Haak 4 months ago

      @not bob Wow, that is a nice system... we just vent it in the air here.

    • Elvin Haak
      Elvin Haak 4 months ago

      @tie pup They are nowadays sold in masses here in our countries where they used to be pretty rare like 20 years ago.
      In many houses the newer heaters do not heat as much as they used to and the gasprizes (for natural gas for heating in the central heating) has doubled since last year which has an effect of people getting small local heaters to heat a part of the house fast where they are... Kerosine is populair!

    • Brian Leeper
      Brian Leeper 4 months ago +3

      When the exhaust from a combustion heater is vented outside, unless the combustion air is also pulled from outside (like a 90% AFUE condensing furnace), cold, dry air from outside will be drawn into the building to make up what was vented outside. This will reduce humidity in the building.

  • Ivan Bok
    Ivan Bok 3 months ago

    Haven't watched the video, but it's basically about absolute vs relative humidity. Warmer air has a greater ability to hold water vapour, so things dry more easily in warmer air even if the absolute amount of water vapour is the same. Psychrometric chart and stuff
    But I bet you're gonna cover this in the video

  • the0gato
    the0gato 4 months ago

    You should have some videos aimed to giving parents ideas to work with their kids!
    Excellent channel BTW

  • João Manuel
    João Manuel 4 months ago

    Good evening Mehdi, I am Brazilian and my mother said that air heaters that have a resistance that is in direct contact with the air burn more oxygen and not the humidity itself, which also makes no sense, but coming to think of it, a resistor in direct contact with the air needs to be much hotter than an oil heater. instead of affecting the humidity?

  • Martin Tophill's Pneumatics

    Closing in on 5 million subs Mehdi. :)
    Keep making great content mate.

  • electronron1
    electronron1 4 months ago +24

    As someone who spent more than 40 years designing equipment that controlled temperature and humidity for product testing I knew where you were going with this before clicking on it. Well done.

  • Allison Pell
    Allison Pell 4 months ago

    All heaters "dry the air" in the sense that hot air has a higher capacity for water, and heating air with a set amount of water will lower the relative humidity.

  • Dr Tannaz Ebrahimi Adib

    Some electric heaters have such a high velocity airflow that feels like a blow dryer and hence dries up the skin.

  • Sarthak Gandhi
    Sarthak Gandhi Month ago

    A fireplace actually burns Hydrocarbon fuel(Wood). Which in turn gives out CO2 and Water Vapour. So a Fireplace actually makes the air more humid. But yes The electric Heaters have nothing to so specially to reduce humidity.(Except lowering Relative Humidity which is done by regular heaters as well.)

  • Alaric Balthi
    Alaric Balthi 4 months ago

    Thank you for making me understand that i have been wrong.
    To my defense, i have never thought about the matter that hard, idea of it just sticking at some point.

  • Jim J. Jewett
    Jim J. Jewett 4 months ago

    A furnace typically includes a humidifier, and an electric baseboard heater usually doesn't. So the electric heater does make it feel drier in a way that the typical furnace doesn't.

  • Christoph Lipka
    Christoph Lipka 7 days ago

    Open fire generally DOES create some H2O vapor in the process (unless you're burning pure C). So compared to open fire, electrical heating does make the air dryer. Or rather, less moist.