DIY Heat Recovery Ventilators for 50$. How HRV Works.

This video is about Heat Recovery Ventilators (or Recuperator) and to improve your indoor air quality efficient way. It’s not difficult to do your own homemade HRVs. I explain how air heat exchanger works, what’s the main parts, what to pay attention to when choosing parts for DIY recuperator. Here I use my own heat exchanger design made from PCV and aluminium tubes.
I made two types of recuperator with my own hands. Comparison of noise and temperature indicators. Temperature measurements using a thermal imager. Experiments are carried out at home.
In next videos I’ll show improved version of Heat Recovery Ventilator - a bit more expensive, but more efficient.

#diyyari #diy #diycraft #diyideas #homeventilation #homeimprovement #recuperator #heatexchanger #ventilation

Fans - Deepcool Gammaxx 200
Timer Relay Module - S08
Thermal Camera - HT-102
3D Printing Model STL File -
3D Model of the Recuperator for Compas 3D -

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[corlfranco]

Use solid state switching: triac or mosfet or transistor (reduces relay noise). Use a polarity reverse on both fans instead of switching between one or the other (to use 2 fans always instead of just one or the other at once). Add a pause at the switch event so the fans dont fight each other during free coaster transition (to reduce transitive state inneficiency )

[donalain]

I build a comparable system 10 years ago. But used a self-made conventional heat exchanger (the square box with a diagonal orientated square radiator in it type). All you need to build it is a cheap roll of aluminium sheet. Installed a strong fan to blow the air in on one side of the celing of the balcony, added a stainless mesh, carbon and HEPA air filter in front of it, and cut an outlet vent oopening on the other side of the balcony.
next just cut an inlet and an outlet with a bathroom exhaust vent in every room, connect it all of it with duct pipes in the celing and its done.
Has cost me less than 50$ per room.. and you get a constant airflow.
the only problem is regularly changing the hepa filter and water accumulating in the pipes.

[klausbrinck]

work by storing heat. You did the opposite, by using aluminium (or any metal for that matter, but aluminium is surely the worst bet of all cheap metals). Spend additional 150$ and get the real deal with a ceramic core. If your wall is thick enough, get 2 ceramic cores, and set them up in series. That will raise efficiency from 90% to over 98%, like in the big centralized Heat Recovery Ventilation systems (for a fraction of the material/installation-cost, and space-demand). And if your wall isn´t as thick as 2-core-lengths, let the tube stick out of the wall, cause it´s still 100% worth it...

[ivelinbanchev]

That's impressive! Considering the cost of recuperators these days, this could be an excellent alternative. Keep up the good work!

[dominictarrsailing]

what about if the inside and outside air has different humidity? is there a way for water to escape?

[renanfp]

Thanks for this english version! Like your work!

[johnnymaker-jv]

great and thanks for measuring.
could heat transfer and heat exchanger efficiency be increased by placing stainless steel wool in the warm air ducts?
stainless steel wool because it gets along with all metals without corrosion.

[SeaScoutDan]

Need to have 2 of these tubes. What goes out, has to come in from somewhere.

[specialblorb]

Thanks! I was planning something similar but with peltier / thermoelectric device to act as a heat pump between the outgoing hot air and incoming cold air. Oh, I agree with the other comment that commercial units seem incredibly expensive for what they are!

[joyrideyt]

Hi there
What is the name of that priting device creating the the white model?
Thanks

[danielseddon]

Brilliant. I was looking at the price of these online and thought it was an excellent 3D printing challenge. I was thinking of something along similar lines to yours, but you answered some of the thoughts I was having.

[rifkyramadhan]

Thanks you for sharing. Low energy can cooling room or heating room

[PeterHertel]

Very interesting. Thank you for sharing. I'm in need of continuous fresh air in my basement and I'll try to print your version. All the best.

[WIZ]

I am very interested and on how you set up the fans to switch back-and-forth, how do you get both fans to work with one outlet can you do a video on this just the switching alone is very powerful Thank you.

[DavideArzarello]

Can you provide the CAD file in a more standard format like STP / STEP, I'm not able to import/convert the Compas 3D format

[dsgg]

Only 7 minutes? Please do more! It was very interesting to watch, and even motivates to do something likewise. Nice job! :)
Is there any update video?

[pulporock]

An excellent little video, very clever.
Cheers from Oz

[ndqcuong]

awesome work, just bought a Daikin HRV for $300 on fb

[SufyanUmar-wy]

Please what are the full elemen require to construct this device?

[darkshadowsx]

whats keeps it from sucking bugs into your room?
also looks like a nice spot for bees to nest and clog it up. i didnt see an actual air filter despite you saying it has one.