DIY Heat Recovery Ventilator for 77💲. Improved Version Heat Exchanger! 

Nice! It's worth mentioning, the thinner the wall of the aluminium tubes, the better. The heat exchanger reminds me of early car radiators. They used copper tubes which they would swage the ends, then stack up looking like a honeycomb. They would then dip either side in a large bath of molten solder. This would solder the copper tubes together and fill the small gaps, but leave the tubes open. The water would flow across the outside of the tubes. 6mm copper tube is easily available with much thinner wall thickness, e.g. 0.25mm, but maybe more expensive.

I saved the original video to watch again later and today I've found the comment about this second channel in English. Thanks a lot for sharing all of these information!! Great work!

Great project! I have 2 ideas to improve it. First, put thin insulation around the venting to ensure the cooled outgoing air doesn’t steal heat from the room. Next, add a very thin filter to the outgoing vent to ensure bugs can’t get in through it. Finally, I’m very interested to see what the inside looks like after it’s been operating for a long time, specifically does water condensation build up and lead to mold growth?

Russian diy stores have such a better selection than the uk

Both recuperator videos you've made are incredible! Thank you for sharing all your hard work! It took some searching to find this video. In the US we call them Heat Recovery Ventilators or HRVs, if you put either in your title you might get more hits, which you totally deserve.

this is important work and there is igenuity around here! this is great! Thank you. i think this is a very productive model that can fit in existing residential window sills, and ,,, that is great!

This dude needs more subs. Excellent content

es genial, puedes hacer tu negocio. la gente necesita. gracias por mostrarnos.

I have made a recuperator of drinking straws and it works also very well.

Another excellent idea, thank you for sharing

I built something like this 25 years ago, but mine was designed as de-humidifier and so the outside air was brought into the heat exchanger and the moisture was removed.

Nice, maybe I'll try making something similar. I have a bedroom with no ventilation in an old apartment and I'm about to install airtight doors to block out noise from flatmates, and I also want to keep windows closed as much as possible to block out street noise. So I'll need some single-room mechanical ventilation which is also quiet and blocks street noise. Bonus points if it also acts as a heat exchanger and can help control humidity levels (I recently bought an air quality sensor and it shows ~70-75% humidity for the past few days. Sure, it's been rainy, but I think that's worryingly high). I looked at commercial devices, but the affordable ones tend to have no good answer to the moisture problem (some simply freeze in the winter, some 'recover' water keeping high humidity indoors). So I guess DIY is the best way.

You want the flow to be very slow so it has time to heat it'll get there you don't have to watch it and the filter is an excellent idea especially the charcoal one

Did you notice condensation and that is why you added the heater... or just to be safe? Great improved design. Lot's more options looks like in Belarus.

Excelente Proyecto! Saludos desde Uruguay!

I did practically the same but in vertical design(it deals better with exhaust moisture condensation) and used brass tubes - they are ussually tinner-more effective and solderable...

I built a comparable system 10 yers ago in my condo in bangkok... the problem there is the air pollution is bad enough to clog a HEPA the filter in just days. Managed to increase the filter lifespan to something acceptable by adding a washable stainless mesh filter and a cheap carbon air filter in front of it. Still have to dispose the carbon filter once a week, but it's a lot cheaper than doing so with the HEPA filter. What I like on your system is that it makes it easy to manage condensation... another problem I struggle with.

Love this kind of DIY!

Maybe using copper pipes is a good idea as copper is a biocide and would inhibit mold from moisture

I had been wondering if you have someone do voiceovers for you. This clears things up... Good ideas by the way. Love your experiments.

If the house is closed up super tight and you're trying to exchange air you can do it with one fan you simply draw the air in with that van across your heat and the room air will go past that out the window through a flap a one-way flap

Condensation probably forms only on the surfaces where air gets cooled down. So that's the outgoing air. Would it be OK to just let condensation form then? And design the pipes with a slope so that the water naturally flows out, similar to an air conditioner? Even if mold forms, it would be harmless, as it would not affect the room - just the exhaust air. (Assuming the device is only used for heat exchange in winter, not in summer)

wow, incredible video! you deserve more subscribers!

Maybe I missed it in the video but how efficient, in terms of heat recovered, was your design? Most commercial HRVs are >70% efficient.

And now after a few years, are you still using it? What is your conclusion? Would you make this model again?

Very good and clear DIY! Unfortunately I can not read What it says in the link to the STL-file (I'm from the Netherlands) could you please share a link in a european language?

You are a Hero!

With the intake and exhaust so close to each other, isn't it just circulating air?

This looks interesting... what about differences of humidity? Does condensation not buildup in the tube as the temperature changes?

I’m curious if using copper piping would make for a higher efficiency

Very good. I will make one HRV from coroplast sheeting. Or perhaps from twin wall polycarbonate. Ideally aluminium but scaled up plastic can work. I look forward to seeing your air monitor. I have an ndir co2 sensor that works well, but would like to monitor pm2. 5

aku hadir bosqu, semoga bermanfaat

I am not sure where to install the heating cable to be honest. Are there any diagrams of the build?

Can you do the same in the reverse/opposite? Make one that cools an enclosed room? Enclosed for security.

nice job!

Great video. Thank you. Does this work to keep a room cool as well?

What about copper pipers? is the price too high?

I liked the video. Greate work. I am not able to download the 3d-print model. Maby i need to do my own. Dont know if the dimentions is the same in my local hardware store. But thanks again. realy good and informativ video. Do you think that isolation of the heat exchanger can be benefisial in realy cold climate (solving intake air cooling the room) ?

Any updated version yet?

Классный рекуператор получился!!! скинь вариант на русом если есть

Co2 would take a very long time to reach buildup limit

Excellent work. I'm in Australia and having trouble finding the PVC Duct parts. Do you know the name of the manufacturer? Thanks.

Yall have a way better selection of aluminum and those plastic ducts or whatever for a hardware store compared to America

Did you consider submerging the heat exchanger piping in a liquid to increase specific heat capacity? What about using heat sinks on the exhausting pipe work to aid in more efficient heat exchange?

Not bad but jeez why not use an intercooler from a car?!

Does the cover function as a diffuser? Would a different different diffuser design improve performance?

Hey! Nice project, did you ever test it's efficiency long term? Good luck with your projects

This is a really good ventilation system! I'm looking for an alternative to ac since it is too expensive. I live in the Philippines and wondering if this can also cool the room since it is burning hot in here. Hope you can answer my question, thank you!

Odlično

I gotta set me up one.. wifes gonna leave me if i dont start venting my farts.. she says fans are too loud and just blow them around the house. Never thought i really farted that much but apparently she says its like a second set of lungs.. ha..

how often would you have to clean these?

What is the change in temperature across the heat exchanger?

How did you install the heating element? I could use more details on that part.

les tubes en aluminium sont trop fins, vous allez perdre beaucoup de puissance en frottement sur la couche limite d'air.

Where can I just buy one?!

What do you think about Prana heat recovery ventilators? Their recuperators seems better than other recuperators with one engine and one canal.

do you make one version which you sell?

It's funny how your voice-over guy just said the complete nonsense lines translated literally. It would be best if you also had proofreading.

None of these materials are common in the US. I'm going to have to make mine out of one super long concentric pipe.

USA. Anyone know of a pre made one of these I can buy? Or anyone wanna make me one I buy it :)

Are the fans interlocked?

This might interest you. It's a video on commercially available residential heat recovery ventilation. ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-QOSelUK6dpQ.html

next time use node red to cllet data is simplear that his

Очень хорошо, большое спасибо! У меня дома 7 кошек, и они много тратят на мои ноги, когда они собирают свой мусор, вонючий воздух становится уродливым, так что зимой мне больше всего этого придется делать, я также временно ем здесь на индукционной плите, и пар тоже надо вывести, привет из Аргентины! Muy bueno, muchas gracias! tengo 7 gatos en casa y pasan mucho en mi piesa, cuando hacen sus basuritas se pone feo el aire oloroso asi que mas que nada en invierno esto voy a tener que hacer, ademas tambien hago de comer aca temporalmente en un anafe de induccion, y el vapor tambien hay q sacarlo afuera, saludos desde Argentina!

Мммм.. А вы это продаёте?

Ha ha ha .one fan is needed to make a circulation. No reason to use two.

interesting but.... Slava Ukraini

This guy ventilates