That diagram and explainer of the heat pump cycle is probably the best and most concise I've ever seen. Nice work.

This is the best explanation of how an AC and a dehumidifier works that I've seen to date. Thank you for helping me to finally get the process.

Just want to take a moment to appreciate the ease at which you completed that hand-drawn circuit at 2:25 to reconnect to the original arrow. Spot on. I would have missed completely.

Great video and explanations I personally just purchased my first dehumidifying unit didn't know how it works this video was very helpful

You are gifted at explaining how things work. Keep up the good work. Coming from a Hvac technician.

Thank you, Zach. I'm now educated on how A/C and dehumidifiers work. The next thing I need to know is how to choose a humidifier for a 700' condo in south Florida!

Wow. Just wow. This was amazingly produced. I’m in awe. Amazing job.

Quick and simple, thank you so much. Keep the good work :)

I have always wanted to know how one of these works. Thank you!

Wow, Simple enough to understand and yet still thorough to have a grasp of the underlying principles and processes. Amazing explanation!

Dude this video is amazing! Thank you so much, I work with these all day and you really helped me out. Subscribed!

Great explanation. Love it.

Thanks for the educational video. Never owned one of these but now that I understand it's basic functions, I'm going to buy one now.

Best explanation of how dehumidifiers work on the Internet I found. Nice job and thanks for spreading your knowledge sir.

Great explanation for how this works! Other videos made it overly complicated. Thank you.

Great video. Just a correction: the air coming out on the other side is actually hotter then the intake, that is because of the latent heat from within the humidity that is being absorbed into the evaporator coil. So if you have 70°F being pulled you can have 75° blowing out on the other side (all depends on the latent heat). Great work. Thank you

Superbly instructional video on dehumidifiers!

Best explantation ever. Thank you very much!!!

Excellent! Thanks for the great explanation and drawing.

This is such a good explanation, thank you for this video

This is a great video. Thank you!

This was a very informative video. It was straight to the point and thorough enough to understand the principles of dehumidifiers. Thank you

Great explanation! Thanks for the helpful video.

Awesome video. I have the same dehumidfier but mine is frosting up around the evaporating coil 2-3x the size of the coil and the ice melts but does not drain in the bowl, just goes straight down and leaks under the unit. Once again awesome video. Subscribed!!!

Pretty cool Zach, thanks for the explanation!

Explained clearly.... thanks.

Amazing video, very helpful and clear the concept Thanks

Perfect explanation. Answer all the questions I have.

Excellent explanation. Thank you for sharing.

Great explanation, thanks!

Zach you are so awesome! I thought I would try to fix this dehumifier before I threw it out and you helped me fix it! Thanks so much!

The explanation of the A/C system was very good.

Excellent explanation! I'm working on a water generator unit with Solar and Wind power... this is helpful. I would replace the refrigerant with a peltier module to do the "cooling" part and save all that compressor issue. Still working on it...

Awesome explanation 👏

You are a great teacher

know the thermal exchane principle already. But cannot figure out the exact engineering arrangement until watching this video. Thanks for you detailed explanation.

Great! Thanks man. You just motivated me to learn new stuff. Please keep doing this

Thank you so much Zach I love this video and your explanation I want to build it from scratch with an arduino

Excellent video!!!

Cool beans! That was a good explaination. Thank you!

Great video, thank you

Thanks for this information

Good job sir. Keep it up. Enjoyed the video

thx for the vid, helped me a lot

Awesom job explaining how a dehumidifier works. Last one we had stopped working, we moved, and I had to repurchase another one to help keep basement humidity low. Since we've had hot days and been running our heat pump, the humidity has jumped to 65'ish%. Would rather have it between 45-55%. Wasn't expecting the heat from the dehumidifier to warm our comfortable 69°/70° room to 77°! Unit has a Set setting, along with Continuous and Max. How is the exhaust (warm/cold) going to be during each of those settings? Which will keep humidity set at a specific % and limit heat? Thanks, in advance. Loved that you included a real-like example of the frosting of the coils and the melting of the ice.

Amazing!! Thanks Bro!!

Awesome. Thank you.

Excellent. Thanks!

This deserves a sub and thumbs up 🎉

You got a subscriber 👍❤

Nice video Zack thanks for showing the internal workings. I noticed my machine it seems to be dripping the parts at the edges for the copper coil winds around. Is that normal? I mean the part that's not covered by the aluminum fins. Also I noticed something strange in my collection bucket the water that comes out has this sort of blackish grayish residue when I pour out the water. I cleaned the bucket but it seems to be coming from the inside of the machine because I can see it on top of the drip tray where the hole is. It wipes off relatively easily with a paper towel and it almost seems more of like a sort of a graphite than it does actually seem like mold but I guess it could be some type of mold. I've had a few other dehumidifiers and they don't seem to have the same problem that this one does so I guess I need to open it up and give it sort of a deep cleaning but I'm not really mechanically inclined so I'm a little hesitant to get too far into it. I'm ready to open it up the next time the bucket is full and see if I can get some extra gunk out behind behind beyond what the filter is

Good info. Just Subscribed...

Great video. Thanks. But how do you clean the gunk out that collects in between the two coils?

Really clear thanks

very good video thank you

Great breakdown of how the system works!

Very helpful.

Great explanation, if I say so myself.

Good video👍

Awesome..keep it up

Actually in addition to the compressor getting hot, the air coming out of the dehumidifier is about 10-15°F warmer than ambient temperature due to the release of latent heat. Evaporation absorbs latent heat energy, thus cooling things down. Therefore condensation, which is the opposite and what ends up dripping in the tank, releases it, thereby causing the temperature of a small room to rise significantly when running a dehumidifier. The effect on sensible heat energy (temperature) by the release of latent heat energy is about 970 BTU/lb of water collected in the tank. The heat produced by the compressor, and less so the fans is about 3400 BTU/kWh. If a dehumidifier removes 1 lb of water in one hour and pulls 400 W. (That’s 0.4 kWh). 3400 X 0.4. So there’s about 1,360 BTU of sensible heat from the compressor and fans and 970 BTU from latent heat release. In this case 41% of the sensible heat produced is actually from latent heat release.

I wish the exhaust temperatures were the same! I have yet to fine a dehumidifier the has the same entry temperature as them exit temperature. If you find one let me know!

Very helpful video. How do you test/repair the excessive frost switch function? My Frigidaire FFAD7033R1A runs the compressor too long.

Awesome 😎 thanks

Thanks you for your nice video, I have this kind of unit and wonder how the defrost mode kick in ? - cos I have look inside and there is only one PT sensor for checking the temp. when it get to cold, is the sensor both for shout of compressor when it get to cold AND for detecting that it need defrost ? - I have a woods model 10

Thats explain it much better than my instructor.

Good explain

Very good explanation So if I have a dehumidifier and I bypass the air after it passes over the cooling coil and force back into the room And if I add an additional fan to draw outside air over the hot coil , and then exhaust it back outside , I would then cool the room and have an a/c ?

💯% I used to wonder why dehumidifiers don't cool the room until today

great video! My question is; why does my AC cool my room faster on the dehumidifier setting as opposed to temp?

Not sure about your background, are you a prof or an engineer? this is a high quality explanation done elegantly and many people would be benefitted. Thank you! Also, I have a question, my dehumidifier is 5 year old and recently I noticed - it runs fine but its not making the air dry and so very less water, if any is collecting. is it time to buy a new one? or I should try to tweak anything? what's the top thing inside I should take a look? appreciate your response when you get a chance. Again, thanks for the video.

Great video. I have the fan working and air blowing but the compressor not heating up and checked the capacitor which as no power. The capacitor has 4.7uf 380vac. Will 6uf 400vac work?

Fantastic video mate. Can a dehumidifier placed in the hallway work for multiple rooms whose rooms are open and connected to the hallway? Will it work that way? Assuming the four or five connected rooms are ranging from 8 to 16 sq.m and it can dehumidify multiple rooms at the same, how large a dehumidifier do I need?

Just found you and subscribed

thank you....

How hot does the compressor usually get? The one I had was almost too hot to touch after running for 2 hours, was wondering if thats normal

wow somebody actually describes the process well most people get it completely wrong .I see so many people thinking the compressor puts out cold freon liquid rather than hot gas the only thing i would add is the heat from compressor actually makes air warmer coming out then when it went in through the condensing coil getting rid of the compressor heat

I am looking at building a vacuum wood kiln which if you can vacuum down to less than 1 inch of mercury you reduce the boiling point of water to around 75°F. Doing so safely releases gallons of water in a short amount of time but you also create a mini rain forest. I've thought about putting a dehumidifier in the chamber to control my condensation but am worried about how a dehumidifier would perform in the absence of atmosphere. Any thoughts?

I have a 70 pint Honeywell TP70AWKN. It is located in my basement with a temperature of 70 degrees. The Dehumidifier is set at 50 degrees. Sometimes it will go down to 45 for 3 minutes, and then shutoff. The level will go to 55 and then start back up. Other times it will run for days and stay at 46-49 degrees with cool air out the top. Then it will at some point start operating the way it should again. Is this normal ?

would it be okay to spray down the part behind the removable grill.. the metal part with fins, when its unplugged of course. theres some gooey stuff that I need to get rid of

What is the grills are made out from? I got a new dehumidifier and strapped on an 3M particulate air filer on it and am thinking to UV sterilize the water and drink it, as I do not trust the tap water. You think there would be a lot of heavy metals leaching into the water. My ppm meter measure 19ppm but I dont know of what. Any help will be appreciated

In fact, every single hose portable air conditioners is practically a dehumidifier because the hot coil and the cold coil are just beside each other blow the hot humid air and more effective to remove condensation and not cooling the room.

if not using a drain hose, does a cap need to be placed over the orifice provided for a drain hose

Is it important for effectively dehumidifying that the cold and hot coils are right next to each other? I tried using a mobile AC unit on the dry setting (without the exhaust hose attached), it just heats the room but collects barely any water.

How about the portable ac thay has dehumidifier, works the same right?

Great explanation. Me being novice and wanting to learn it leads me to a questions. Is there not a way to cool the air without using a compressor, bc there is heat made by compressor as well as it increased the temp of "coolant" to 200degrees in the example. Does it have to be liquid in order to disperse the coolant at a cold temperature? Is there no way to have a coolant that sits below room temp in a natural state and cycle that in front of the coils/fan to cool the air? Another question would be. Are there any systems that r designed in such a way that the would essentially put the Warn-Liquid compressor coil 'under' the Liquid misting cooling coil, which would drizzle the icey cold water, over the Warm coils to lower the temperature a tad, but keep coolant a liquid, but utilize the off-heat better. I know it sounds like the ramblings of a madman but my mind wanders when it's trying to figure things out.

I have an idea, take the air conditioning unit from a old car. Run three fans on it. One for the compressor and hot coil. To blow heat. Separated by a insulated wall that holds another fan system to blow cold air/ keep drinks cold. Separate the drink compartment from the cold coil to allow the dehumidifier to act as a water generator for the car... this gives several benefits, a mild heat source when engine is off, cold storage, and water collection for the house... add a charge controller onto the orginal battery and run that to another seperate 12v marine battery with a decent reserve capacity. Or an entire battery bank if you want to go the extra mile. Add in a wind turbine to your car system and boom mobile power and water generator for simply running your car as you would anyhow (food delivery and commercial industries are missing out!!). Total cost would be miniscule. As low as 20 for the charge controller, 160 per battery, 50 for the inverter, 30-50 for the coils, and 0-150 for the air conditioning unit... another side note consider running the water reservoir to the underneath the hood, thermosyphoning the water for extra heat and hot water on the go. Plus water running under the hood will be smart to run alongside the heat system coils. Allowing additional cooling to the engine compartment and increased free heat and hot water to the system

Ive always wanted to make an air-conditioner out of one of these just for fun just to see if it can be done. Place the warm coil on one side of a wall with a fan blowing out, and place the cool side on the other side of the wall with a fan blowing in, with a drainage tube for water of course. Seems feasible.

Great video and explanation. Thank you. I've been holding on buying a dehumidifier beacause I don't know how it works. Is there a leak of refrigerant gas concern of dehumidifiers? If it can leak in some cases, how to check for a gas leak. I read the gas is toxic to humans breathing? Does it create and generate ozone? Is there anything I would be cautious considering buying one? Thank you so much.

Excellent, you should be a teacher. Am 70 yrs. old, auto-mechanic 40 years.

Tip: Apply a thin coating of silane (not saline) to the coils - not fins, but coils - to reduce corrosion, and premature failure.

Doo you think we can make some tweaks in this design to make it work like an AC. As dehumidifier are comparatively cheaper than AC. Its is compact and easy in mobility.

excellent video. I am trying to figure out an efficient dehumidifier heater system for a wood drying kiln-like device. To do that, I will need a flow of dry warm air, the temp of which is determined by the moisture content of the wood inside the dryer. I need to control the temperature so as to hold the humidity constant. That way, at any instant I am removing from the air exactly the amount of water that was released from the wood. I am trying to create a solution that will allow me to dry lumber sawn from logs in the absolute minimum time possible. I intend to establish this minimum by experiment. I will draw the water out at increasing rates until the wood starts to crack or check, then back it off a little. My intention is to sell the electronics, heater, and dehumidifier as a stand-alone unit, allowing the user to construct a wood kiln of any size, all the way from a multi-room warehouse-sized unit that can dry truckloads of wood to a small unit for drying individual pieces of firewood.

Cab you fix a dehumidifier, I have one that is showinhg Er code 1 which basically the compressor doesn't turn on. The fan works. I was told this may be a senor gone bad.

This is a really great explanation. So this gives me an idea; maybe you could weigh in on it? In RVs and Vanlife, how to heat during the winter is often a tough decision. One of the heaters is a catalytic heater that uses propane. This has the advantage of being quiet, safe(ish), and energy efficient. The major drawback is that a byproduct of the process creates moisture, and in a smaller space this can get pretty uncomfortable. The solution is to provide enough outside air exchange to let fresh air in and moist air out, but obviously that's an inefficiency. So my question: based on how a dehumidifier works, does this mean I could essentially duct cold air from outside the RV through a pipe with fins and then back out again, and it would dehumidify the air? Or even have some kind of antifreeze stored outsidepiped through a copper baseboard contraption? Since this would also cool the RV a little, would this be less efficient than exchanging air?

How does the dry mode work on a split AC system?

GJ keeping your face atraight when you said "but down in the bottom its puttin it out"

What if the frost doesn't melt away ? Mine has a big round bunch of frost that is 1" thick out the back side and it never seems to be gone.

Temp coming out of a dehumidifier is always warmer than the air going in. Always.

Is there a way to convert a window mounted AC into a dehumidifier?