DIY simple cheap easy HRV=fresh air system for your home (prototype 2) 

Thinking of doing DIY air exchanger for the bathroom for getting humidity out for some time now, watching this in middle of the night, could not sleep, tnx dude for this vid ;)

Nothing better than being a tinkerer - love it!

Right on!!! Flat out. THank you for making this video posting. This helps me take steps to a whole new level. Thank God you made this. I get it now.

This is a very well done project, and very helpful video. Thank you for recording and posting this project for all to see (and be inspired).

Half inch aluminum flexible electrical conduit seems like it would work considerably better as far as efficiency and is cheap and widely available. It's ridged and smaller which would create a lot more turbulence with the air.

Great idea,,,, clever way for a heat exchanger ,,,, good video ,, thanks

I like the idea... Of how you extra hot air from your room and at same time bring fresh air in

The heat exchange system idea is great.

For a sed or garage.. I like this. Simple effective.

It was really amazing design. Simple, cheap and efficient

Great idea, thanks for the upload!

The industry needs to come up with something like this (smaller) for sheds, garages and CAMPER VANS because right now nothing small exists.

Really good! Big improvement on the first one. Great inspiration for a future project I have in mind. Thanks!

Great simple design, brilliant! I imagine by making it longer the efficiency could also be increased... If possible, please measure inlet and outlet temps, efficiency of HRVs is easily calculated by differential Temps... Good Job. Even if your getting 30-40% efficiency, that is an awesome and worthy endeavor. The need is great for DIY super insulated tiny off grid homes, where these type of computer fans are easily run by direct connect to small pv and actively vent during day....

I absolutely love your garage. The roof allows for natural light. I think I will try to do the same when I get the chance. Perhaps put some UV protection film on it. Thank for the videos.

Great job! :) Thanks!

good tutorial and very useful, success always

LOVE HIS WORKSHOP

I like your design. Actually I am planning to make my vacuum cleaner exhaust blow out instead of circulating in the room. A different way of air flow. Your presentation is very helpful

Good idea 💡

thank you for the ideas

Very nice idea I Like it.

Thanks you for sharing

Thank you.👍

Super awesome...👍👍

VIDEO YANG SANGAT BERMAKNA.....dah sub..

Looks great! I bet you can improve efficiency a lot by making it longer.

You should really try to make one from thin metal sheets, like industrial aluminium foil (the thicknes of single-use disposable aluminium-foil baking trays or disposable grills), or other metal sheets, or even plastic sheets of paper (ideally paper coated with a wood varnish). So you would make multiple sheets, each even space intake and odd space exhaust, using silicone on the sides to keep the two air sources separated, then have the whole thing longer to recycle more heat, thermally insulate the whole thing for the same purpose, and maybe only use an intake fan with a paper towel or toilet paper as an air filter to prevent outside dust from getting in as easily. The result migth be larger, but you will also not lose as much temperature to the outside, and you might even get less dust thanks to the paper towel air filter / toilet paper air filter. And you can use toolless screws for changing the filter, and optionally also a hinge.

Thank you so much for taking the time to make and share this video. Very well done. Could you run the power through a variable speed rheostat to control the air volume? I thought that you did a great job. I hope that my suggestion helps with your winter temperature issue.

I made such thing from alum tubes 12mm diameter. 1m length, 72 tubes, 3d printed detail. Worked for 3 years, when -40 at street, input was about +12

Thank you very much, I will recreate it. But try to mount a filter in front of the air inlet. Thanks a lot :)

nice idea

Amazing... thanks..👍👍

I have changed the text to HRV thanks to Zaka Pentax for making me aware of the error.

Would be very interested in seeing the in and out temperaturs from it so you ca calculate the efficenty!

Thank you info can be used to build two of them for our place

Thank you for this. As a visual person I appreciate a vid wothout talking. Question on function - do you have something more on how it is wired up? You need a 12v transformer? What kind of temp range does this work over? I'm in Australia, so minus one or 2 degrees C up to 40 or so is usual.

It would be interesting to see the efficiency of this. You’d only need to measure the temperature for inlets and outlets to see how it compares to commercial units.

Add-ons: a solar air-heat box of choice, added to exterior intake; warms & can filter incoming air. ALTERNATE SIZING: use wider diameter culvert pipe, to fit in many more of the small exchange tubes, twisted, & longer. Can then use common box fans to move the air. The fittings would maybe be trickier, but T-connectors are available. This would work well for larger rooms. This design shown, tho, makes it so easy to make air-exchangers for single rooms! Could use one on sunny wall for winter use, by putting the intake pipe into a solar-air-heat box… & a 2nd one, longer, on shaded wall for summer to help cool, by right-angling the intake pipe outside, elongated down towards the ground, pulling air from a shade-cooled filter box near ground.

Great

Thanks for the idea. Any problems with condensation and mold after long-term usage?

I had the idea to build something similar but using square ventilation tubing and Correx for the core, otherwise exactly the same principle. Maybe one day I will get to post a video about it.

Like very good my dear ❤️🌹

I would like to know the working principal of the mechanism. At one end I could see that it's throwing out stale air inside. The positioning of fans in terms of air flow direction will be able to help me understand it better. 😊

Wouldn't lots of smaller tubes be better so moisture doesn't cling to the large surfaces? Also, where is the filter because won't we be sucking all the pollen and other stuff in from outside?

This is definitely a really cool idea. I would like to leave a tip: Use CPU coolers, brands like Cooler Master or Corsair, I say this because they are less susceptible to failures caused by dust and last longer

GOOD JOB BROTHER 👍👍 THANKS FOR SHARING THIS VIDEO 👍👍 NEW FRIEND +1...👍👍

It looks like a NASA 🚀

Awesome.. As a fellow person living with ADD and the challenges we face,. You've inspired me to start working on (and to finish) some of my projects. Keep up the good work. Where are you located? I'm in Ozark, Missouri. Keep in touch.

If the incoming air is too cold add a solar heat box to draw air through and control the fans via Sonoff TH-16 with temp probe. The box can be any size and contain aluminum down spouts or soda cans painted flat black. Draw incoming air though it. Add a small solar panel to only allow this to run when the sun shines and it can also charge the batteries these fans run off of when the Sonoff shuts off the fans. If the air gets too hot, add a duct damper controlled by a separate Sonoff TH-16 to draw in normal outside air. If you need this to run at night, add a water fed coil in the system fed by your water heater to warm the outside night air. It will also let you tap into the unused heat from your solar box outside to heat water when you don't need to use it to heat your living space. Note: you will need a separate water heater to use and pass heat to your main water heated either direction they require. You may wish to keep these water heaters separated and just use the 2nd as a heat bank for use at night to heat the incoming air via the banked heat in your water heater. Dampers and fans can be controlled within 1 degree on/off - open/closed via Sonoff TH-16, right from the eWeLink app. Alexa can also tell you the temperature of any of these Sonoff probes when you ask it. More work but you get fresh air and at the temperature you desire while exhausting humid air containing all of the CO2 and possibly carbon monoxide and any other harmful toxins. I hang passive solar panels inside my south facing windows and save 25% energy to heat my home on sunny winter days. These panels can be simple cardboard covered with aluminum foil & foil tape painted flat black. Leave space for air to pass by. The back of the cardboard will not get above 90f and the foil can get to 130f. You can also add a solar powered fan to disperse the heat. The fan will be just like these you use and the tube will have several holes blowing up the panel to move air past this 130f foil. Yes, this is safe as cardboard needs to be approx. 400f to combust.

Super

how much does it actually change the incoming air from outside? What is temp outside and what is it when it's entering the house? I have a feeling there isn't much of any benefit in this build to the actual ERV function. Assuming it is a nice balanced push pull fan combo though. Nicely done

you can also reverse your blade for cutting plastic

With the in and out so close together will this cause local recirculation. for example the 'in fan' air gets quickly sucked out again by the 'out fan' - just wondering??

Maybe some hepa filter would improve it

I have a different system. I use a very powerful blower to blast fresh air inside my room. Through open windows the stale air can escape.

Nice! Trying to understand how yours works… It pulls out room air via the 3 tubes, while it pulls fresh outside air into the small holes in big pipe to warm it over the tubes before it comes into the house? 🤔

Dude, you didn't theoretically explained it- how can both the fans: fresh air inside and exhaust fan work so closely in the same tube. Thanks.

Great video. You would get much more flow by have space between the fan and the metal tubes.

I would prolong the inlet with the tube, to not risk a short loop of the air.

This is awesome, but I am having a real problem finding the aluminum tubing.... Perhaps I am not searching for the right thing... Did you purchase this semi rigid aluminum tubing online, and have a link to the site? I would sure appreciate it!

Very nice, those HRV systems are ridiculously priced.

Few pointers you would get little less heat loss if the unit would be closer to floor where colder air is located. Of course then you feel the cold easier so it has also minus effect. You should press few dents to those aluminum pipes to create little bit more turbulence inside the tubes. That would boost the performance even more. You can add those afterwards. Just drill 10mm holes to that plastic pipe and push them inwards with pen etc dull object. Or add baffle plate on the 3 inled holes so air starts to be turbulent rigth from the start. that can be calculated based on air speed vs hole size. For 140mm arctic fan 49 pcs 18mm holes should be enough. I will soon know as next CFD simulations should come ready soon. Anyway great construction and thanks for sharing.

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Nice! Have you noticed any water condensation issues with this design?

Editor is fan of Vin Diesel it seems............. 2 Fast But nice project

I'm trying to figure out what the difference is between this and just opening the window. Does the minor amount of heat exchange the other fan makes noticeable enough to be worth the build? Looking to do something for a Skoolie i'm converting. Thanks.

What do you use to power it? 12v supply of a desktop, or some charger... thank you

im at a loss here? what does it do, does it vent out or pull air in? then what does the fan on the side do ? im asking cause i just dont know, i think i have an idea though

Nice alfa 145 ...

Great design but it would have been helpful to see some numbers like outside temp, inside temp and final temp of incoming air.

How did you power the fan? did you use batteries or adapter? Did you directly plug it in the AC wall outlet?? Can you make a youtube video how did it?

one fan for cool the hole. one fan for air in room.

Source or description for the inner aluminum pipes? What size are they?

You said its effectively. How effective? How long in summer season cooling down temprature 1 degree celcius?

question is it possible to suck the same air in? I would separate them, so as to know that I am not sucking up the same air.

Can you show a diagram of the airflow? Im confused to how this would work when the heat exchanger output is on the same are as the other.

Is this working as an intake and exhaust at the same time?

Pero no se hacia donde giran los ventiladores, y que parte va hacia afuera, gracias por compartir

That is cool Man Is it still work until now?

can u add a heating cable in it to get warm air?

How much air absorbs per minute,, now,,, (I would need it to absorb moisture (between double wall, floor, (ceiling)))

What about an optional USB Fan one that could be powered with a Powerbank if needed?

Is that necessary to have 3 aluminium hose...why not same size about a decimal in less than the pvc pipe.... Please...

What is the purpose of the 2nd fan which is installed on the top?

Inst' a ERV porus so it can exchange humidity ? This is more like an HRV to me

Why do we need to fan??

Is this practical to a tropical climate? I dont want the heat to stay inside.

What is outside wind's effects on this unit? Can it handle gusts?

Can you share links to fan and electronics components?

1:44, man you should really attach that saw to some table

what does the side fan do?

Heat Exchangers for venting are such an energy efficient solution that is still too underutilized.

so is that 2" flexible dryer hose inside 4" pvc pipe?

Hello Can I replace the aluminum hose (or whatever it's called) with a drink can?

What is the purpose of the small holes in the PVC pipe and use of the metal flex duct? Why not just have a screen on the outside and maybe a filter on the inside? I don’t understand your design.

Inspired HRV recuperator for sliding window: ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-fLC-8Bd6-xk.html

no te vayas a congelar cuidado

How much area it is suppose to ventilate.

where are u buying the fans