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

[@ricsoares8169]

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

[@DIYWITHADD]

Hey Ric Soares there exists some small ones like this but they work a little different and is a lot more expensive, they have a core and one fan that reverses after a period of time to cool or heat the core. Hope it makes sense. Thanks for watching 🌞

[@guatf1]

There are simular products available, at least here in the Netherlands cost around € 250 wouldn't be practical for camper but for a shed it could definitely work, but would only be "necessary" if the shed I'd heated/cooled I guess

[@KIKI55cro]

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 ;)

[@DIYWITHADD]

I am happy to be able to inspire 😃 Thanks for watching

[@2011Maynard]

Nothing better than being a tinkerer - love it!

[@DIYWITHADD]

Thanks thats eksakly what I am 👍🌞

[@nylesgregory2120]

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.

[@DIYWITHADD]

Happy to help 👍 now you can make one off your own 🌞

[@canyon3706]

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....

[@DIYWITHADD]

I will need to make a temperature testvideo at some point 🙂 Thanks for watching

[@TheHugguan]

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

[@DIYWITHADD]

Hey Russel Jimbangan in sommer IT is great but in the Wintertime the inlet fan is turned off. And when you think about the cost og this fan IT is wird there issent much of these on the market.

[@briansepolen4917]

For the winter, you could have a second one installed at the bottom of the wall to extract cold air from the room, instead of the warm air at the top of the room. Definitely need vent covers to stop airflow when off.

[@bran-qt7ds]

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.

[@CA.....]

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).

[@DIYWITHADD]

Thank you C&A Bobyn i Hope to help inspire peapol.

[@CA.....]

@@DIYWITHADD You are doing it!

[@DIYWITHADD]

@@CA..... you just made my day 😁

[@specideal]

The heat exchange system idea is great.

[@DIYWITHADD]

Thanks and thanks for watching

[@JuliusHiiden]

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

[@DIYWITHADD]

Thank you very much. and thanks for watching

[@FreshAirRules]

What kind of vacuum are you using? Older Tristar vacuums can do this. I think Filter Queens also. You just need the exhaust to be able to have a hose attached to it. Takes all the dusty air outside and then you have no more filters to buy. Probably is easier on the motor as it doesn't have to push the exhausted air through that filter. All vacuums should have this ability. Sadly nobody seems to care that they're breathing in more dust during and after vacuuming than before. Unless they wear a respirator that fits properly of course.

[@tjablaj]

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

[@Tuneman-iy8og]

yes, me too, would be very interesting to watch these kinds of videos with some measurements

[@FadeToEvil]

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

[@DIYWITHADD]

Cool IT sounds almost too good to be true why did IT only last for 3 years? Thanks for watching 😁

[@FadeToEvil]

@@DIYWITHADD because I built a new house way bigger than previous, so I have to invent something more powerful. I am looking at polycarbonate cellar sheets to use it as heat exchanger.

[@DIYWITHADD]

@@FadeToEvil I have seen polycarbonate cellar sheets used successfully so it's a good plan I think you should make a video about this projekt, a how to build 👌

[@FadeToEvil]

@@DIYWITHADD ye, I have scheme how to deal with cellar pc, after reading book about heat exchangers! 😀

[@DIYWITHADD]

@@FadeToEvil Then you probably know more than most of us about this topic 🤣

[@kistuszek]

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

[@DIYWITHADD]

I absolutely agree it would be a easy way to make it more efficient. Thanks for watching

[@SapioiT]

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.

[@DIYWITHADD]

Sounds like you have a idea for a project of your own 😀 this could be more effective in many ways but i dont have the time to re engineer this, I have a lot of projects 😅

[@turboflush]

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

[@DIYWITHADD]

You get it ☺️ and almost every body can make it themselves, in a isolated moist shed or basement this is a must have in my opinion. Thanks for watching!

[@josephowens4654]

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.

[@DIYWITHADD]

I have no doubt at all that the commercial ones are much better, but it could be interesting to measure the difference in temperature. Thanks for whatching

[@Abcdefg25152]

@@DIYWITHADD it’s Hard when people can’t read

[@FreshAirRules]

@@Abcdefg25152 What are the illiterate not reading? Was temperature mentioned anywhere?

[@Xxxx-d4z]

LOVE HIS WORKSHOP

[@DIYWITHADD]

Thanks it is impossible to clean 😅 but it works, until the new shop is built. Thanks for watching

[@hoyexisto7258]

Great idea, thanks for the upload!

[@DIYWITHADD]

Thanks for whatching 🎄

[@vedved1550]

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

[@DIYWITHADD]

I did it this way so that the air could have as much contact as possible with the aluminum tubes, it was also the cheapest way. Thanks for whatching

[@arlinchaapel4616]

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

[@DIYWITHADD]

Thanks arlin chaapel I often think thoughts like that things can be made simple and cheap and in many cases they can

[@computer-ot8si]

thank you for the ideas

[@DIYWITHADD]

Your welcome. Thanks for watching

[@Serehfas]

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.

[@DIYWITHADD]

Any small 12v power supply will work on these pc fans. In terms of efficiency I haven't made any technical test on this. I have a lot of projects 😌 thanks for watching

[@fitri-ni1th]

It was really amazing design. Simple, cheap and efficient

[@DIYWITHADD]

Thanks fit ri ! 🌞

[@seemakhalidseemakhalid352]

Very nice idea I Like it.

[@DIYWITHADD]

Thanks 🙂

[@Chimonger1]

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.

[@DIYWITHADD]

You have some really good ideas and i think it would work. And my small project is a good basis idea to work with and add on 👍

[@kevinmcgrath3591]

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??

[@DIYWITHADD]

You are absolutely right, I came to this conclusion myself shortly after installing it. The packaging from one fan (the cardboard box) acts as an extension and it seems to work, it is about 20cm. Thanks for watching

[@AllenTruffaz]

WELL DONE, amazing job. I also built my own unit including my own exchanger over 10 years ago :-) The time flyis so quickly :-D However, I was struggling with the low efficiency of the recovery ventilation unit core. I tried various changes in the size of the exchanger, in the use of material and the shape of individual plates The use of aluminum foil was most effective, but the resulting exchanger was very poorly sealed :-( In the end, I decided to buy just a recuperative ventilation core - an exchanger. I tried to contact several manufacturers of factory-made recovery units, but no one was willing to sell me only the exchanger - core :-( Finally, through detective work, I found out the brand of the heat exchanger installed in one of the units at the air conditioning fair. This is the manufacturer Recutech, which produces both aluminum and plastic recuperation cores. The manufacturer Recutech also does not sell to end customers and us do-it-yourselfers. However, they referred me to the distributor of their exchangers-cores - www.rekupex.cz. After my experience with aluminum foil, I ordered an all-aluminum exchanger, which I have had in my absolutely simple unit made of extruded polystyrene for 6 years and everything works great. The efficiency of heat transfer is therefore greatly influenced by the relative humidity both outside and inside. The system is most effective when the indoor humidity is high. Anyway, the efficiency ranges from 80 to 90%- that seems to me be great :-) Especially in winter, it is unbelievable how much condensate is produced in the heat exchanger, sometimes it is more than several liters per day. Perhaps thanks to this, the recuperation unit helped me reduce the humidity in the house.

[@DIYWITHADD]

That's very cool Allen Truffaz how much did you pay for the aluminum unit ? Us DIY people need a place where you can bye stuff like that! Thanks for watching

[@buffbumble]

This is awesome and i will probably be trying it out for myself soon. I had one question however, if i skip the top fan and only use the fan on the end of the pipe how would it affect the overall fresh air exchange? im going to put one of these in my living room above a window so i cant have any parts protruding.

[@DIYWITHADD]

Hello, if you only want to have 1 fan on and it must not take up any space, then it is just an exhaust and it will also contribute to fresh air, especially if you live in an older house that is not completely sealed, then more air will come in the places where doors and windows are not tight. But in the winter you have to have a way to close it off, these little fans can't keep the wind out either if it blows against them outside, but there are solutions. Thanks for whatching

[@mesranhobbies3799]

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

[@Chimonger1]

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? 🤔

[@DIYWITHADD]

Exactly right! Thanks for watching 🌞

[@chrisluffy25]

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

[@DIYWITHADD]

The way I have made this is that it has better flow out than in, so there will be more air out than in, but you can also choose to have a fan with a higher cfm on the extraction side. Thanks for watching

[@nixonsmateruby1]

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?

[@IvoPavlik]

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

[@DIYWITHADD]

I haven't had problems with condensation, but there isn't much power either, so if you keep the design and fan type, I wouldn't be nervous. Thanks for whatching

[@IvoPavlik]

@@DIYWITHADD cool, thanks for the answer

[@i-vanlife4981]

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

[@DIYWITHADD]

Glad i cut help ☺️ the problem with this setop is the flow is almost to effektiv so if the fan is turned off there is a Lot of Cold air getting in so you Will need som kind of one way valve.

[@i-vanlife4981]

@@DIYWITHADD I might use the same design - just so simple and inexpensive - but make it 4 metres long so that there's a much greater surface area for the heat to exchange. The problem with that might be condensation within it so it might need to be at a slight angle to allow the water to drip to the outside. Also, if the room is airtight, then maybe a fan is only needed on the inlet - creating a positive pressure in the room and the only way for the stale air to leave is through the heat exchanger. Thanks again - great to share ideas like this. :)

[@DIYWITHADD]

@@i-vanlife4981 sounds like a good and interresting projekt, it dosent need to be expensive it just needs to Work 😉 and thats good enough for me 😊

[@1islam1]

🔴 What Is Islam? ⚠️ 🔴 Islam is not just another religion. 🔵 It is the same message preached by Moses, Jesus and Abraham. 🔴 Islam literally means ‘submission to God’ and it teaches us to have a direct relationship with God. 🔵 It reminds us that since God created us, no one should be worshipped except God alone. 🔴 It also teaches that God is nothing like a human being or like anything that we can imagine. 🌍 The concept of God is summarized in the Quran as: 📖 { “Say, He is God, the One. God, the Absolute. He does not give birth, nor was He born, and there is nothing like Him.”} (Quran 112:1-4)[4] 📚 🔴 Becoming a Muslim is not turning your back to Jesus. 🔵 Rather it’s going back to the original teachings of Jesus and obeying him.

[@WolferAlpha]

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

[@PeacefulCountryLife]

Have you heard of Arctic Cooling fans? :)

[@kapdolkim1914]

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

[@mrpupuka7706]

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

[@DIYWITHADD]

You can add whatever you like but I wouldn't recommend this as the tube is plastic as there is a chance it could melt or burn. Thanks for whatching

[@nilopasini7452]

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

[@DIYWITHADD]

You're welcome ! Do yourself the favor of lengthening the pipes so that the fans do not sit so close to each other. Thanks for watching

[@petermorling1098]

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

[@DIYWITHADD]

Thank you. I have next week off so I can get some projects done and would like to do some measurements on this unit too but it depends on how well the other stuff goes 😁. Thanks for whatching

[@petermorling1098]

@@DIYWITHADD That would be awesome. Much appreciated.

[@smarthome2660]

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.

[@OrganicTexas]

I need a picture or a diagram before to understand your concept better.

[@anolinksh6884]

is this still effective if the pipe are 3 meter ?

[@DIYWITHADD]

It will probably be more efficient but the possibility of condensation will perhaps be greater, I would in any case have a somewhat more powerful fan on it. Thanks for whatching

[@anolinksh6884]

@@DIYWITHADD I'm have plans to put the fan in the middle of the pipe, or put extra fan at the end sorry my English is terrible 😔

[@DIYWITHADD]

You can always stack the fans together for more power, and your English is fine 🌞

[@anolinksh6884]

@@DIYWITHADD thank you so much, keep it up 🦈

[@DIYWITHADD]

Thank you for taking an interest in my project 👍

[@하늘자연]

You are a genius. In Korea

[@DIYWITHADD]

Thank you 👍 and thanks for watching!

[@xSO20]

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?

[@DIYWITHADD]

Hello SO20 I started by using a charger for a mobile phone with usb but it only generates about 5volts and this is not quite enough to push the air through the mechanism so ended up buying a small 12volts power supply. Thanks for whatching 🌞

[@TunekoLtd]

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.

[@DIYWITHADD]

You have some interesting suggestions, something that would definitely make this project something with a measurable efficiency. But the heat exchange efficiency is not the only thing I have to take into account, as it works now there is a decent air flow despite the very small fan, and it would get worse with more resistance, at the same time it will also make more noise and it may not make more noise (says the wife) 😅

[@eng.mujtabaabbas]

Can I reply, I am a mechanical engineering student, I have a graduation project, the same work as this device. I want to ask some things

[@DIYWITHADD]

Ask as much you want ☺️

[@eng.mujtabaabbas]

@@DIYWITHADD Do you have a page on telegram or instagram so that I can communicate with you give me the page id if possible

[@DIYWITHADD]

@@eng.mujtabaabbas I'd prefer we just keep it in the comment track so others can use it too. Otherwise, I only use Facebook and KZbin

[@eng.mujtabaabbas]

@@DIYWITHADD OK. How do fans work? Are the fans one to the outside and the other to the inside (inside the building)?

[@DIYWITHADD]

@@eng.mujtabaabbas If you watch this videokzbin.info/www/bejne/f6abgmuBqcqsqMk it will make more sense

[@وصفاتمجربةمعأمانىالوردانى]

Like very good my dear ❤️🌹

[@DIYWITHADD]

Thanks 😊 and thank you for watching 🌞

[@hadiprayitno8632]

It's Workinh sir ? Thanks

[@DIYWITHADD]

Hey Hadi Prayitno it Works well changing the air slowly but the heat recoverry is not great. Thanks for whatching

[@hadiprayitno8632]

@@DIYWITHADD thanks sir from indonesia 👍👍👍

[@shanelipe2552]

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.

[@DIYWITHADD]

Thank you ! yes it can be a great challenge to live with ADD. Super nice to get feedback from someone with the same challenges. I'm from Denmark, so I do not think we come across each other by chance. But I would like to visit the states one day 😁

[@shanelipe2552]

@@DIYWITHADD Wow. I would love to visit Denmark. I love to experience a new culture and lifestyle. How is life and your job? What kind of work do you do? You have a large family, etc. I have no children myself. Only a Godson.

[@DIYWITHADD]

@@shanelipe2552Well Denmark is a very nice country, especially if you are young and not sick in any way, then there are really many good options. Otherwise I would say it's a bit boring we have tons of rules sky high taxes on everything and a bunch of politicians who have no idea what they're doing. However, we do not have to pay to go to the doctor and most people get support if they lose their job but everything is just so fucking expensive (I do not have much money) 😅 I unfortunately got my diagnosis ADD late in life so my youth has been hell. But you do not get my whole life story in this comment track 😉 maybe when I hit 100,000 subscribers 😂 which I hope will happen one day. I am a trained auto mechanic but have not worked like that for many years. I have been on off the job market for the past 15 years due to mental and physical illness. My most recent job was as a teaching assistant for special children. What are you doing on a daily basis ?

[@DIYWITHADD]

@@shanelipe2552 I work 9 auers a week right now in a shop where i do a lot of simple tasks and help where i can we produce sundbarriers for large machines and i love it. I have a wife and daughter 2 years old. I just Fell over your comment and realized that I didnt reply on your questions 🙂 and DK is a butiful country but expensive as a Turist in my opinion but lots of countries are like that 😉

[@AbahFran]

good tutorial and very useful, success always

[@DIYWITHADD]

Thanks Aban Fran I am glad you could use IT 😁

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

[@DIYWITHADD]

Hey, you are absolutely right the two fans are too close together. To prevent Short loop i have temporary put a cardbox box over the 2 fans so they are Further away from each other. Thanks for whatching

[@hoyastoreindonesia2007]

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

[@DIYWITHADD]

Sure you can 😃 its a little diffrent but doable good luck with your projekt 😁

[@hoyastoreindonesia2007]

@@DIYWITHADD if i use drink can,how much drink can i need and what the diameter of PVC pipe?

[@DIYWITHADD]

@@hoyastoreindonesia2007 how you are making IT is op to you, the dimensins is also op to you, my PVC pipe is 100mm but that fits my wall. You need to make one to your specifikations not to mine, I havent made ennything whith tin cans so you need to make IT fit the cans you want to use. 🌞

[@hoyastoreindonesia2007]

@@DIYWITHADD ok,Thank you very much for your information

[@DIYWITHADD]

@@hoyastoreindonesia2007 No problem. Thanks for whatching my video 😉

[@Chupria]

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.

[@DIYWITHADD]

Hey Chupria Thanks I am working on a slightly bigger setop whith a more permanent roof this roof is wery cheap and kondensation is a big problem unfortunetly.

[@tvviewer4500]

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

[@DIYWITHADD]

Hey TV Viewer. The unit sits on the side of the house where the strong winds rarely is. But there has been a couple of storms and the unit didn't break of or anything 😅 . Thanks for watching

[@tvviewer4500]

@@DIYWITHADD Thanks for the data!

[@bimbim1269]

How. Many inches is the. Piipe

[@DIYWITHADD]

10cm Thanks for watching 🌞

[@davidwalesby2426]

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

[@DIYWITHADD]

Hey @davidwalesby2426 the fan on the side pulls air in the other pulls air out of the room it's pretty simple design if you think about it I have made a nother video that's explain it. Thanks for watching

[@rokaraoke]

Maybe some hepa filter would improve it

[@JA-xw9uf]

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.

[@DIYWITHADD]

Hey J A the air exchange is not perfekt when the 2 fans are so close together. I am experimenting with som cardboard box shapes so the inlet and outlet is further apart. Thanks for watching

[@primeracalidad8320]

you can also reverse your blade for cutting plastic

[@DIYWITHADD]

?

[@straightstreet7143]

That is cool Man Is it still work until now?

[@DIYWITHADD]

It still works and as far as I can se there is no mold, but it rarely runs at night just too be fair. Thanks for watching 🌞

[@hari1976ful]

Good idea 💡

[@DIYWITHADD]

Thanks Hari Raharjo

[@DigitalIP]

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

[@DIYWITHADD]

I would not do that personally as I want to do something that should not be charged and which is more permanent. But you can easily use USB fans for a project like this. Thanks for watching

[@DigitalIP]

@@DIYWITHADD Yeah, it would have few uses, but if the power was out on a hot day or something and you dont have a generator it could maybe be useful, or something to that extent anyway. and np :)

[@mak6371]

What is this? An exhaust system for an ant house? (Zoolander reference)

[@DIYWITHADD]

Mak, it can be anything you want it to be 😉 thanks for watching!

[@stanislavdimitrov8800]

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

[@DIYWITHADD]

Hey Stanislav Dimitrov. I haven't had any problems with mold or condensation but it is probably because it's a very low powered application if the fans pushed more air there would be condensation i think, if I should make something different with this project I would make it bigger and put the fans further away from each other. Thanks for watching

[@AijazAhmedthetrainer]

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. 😊

[@DIYWITHADD]

Hey Aijaz Ahmed I made this video also kzbin.info/www/bejne/f6abgmuBqcqsqMk

[@sabelch]

stale air is blown out through the 3 metal tubes. fresh air is pulled in through the space around the tubes. Heat exchange occurs on the surface of the metal tubes. This design could be substantially improved by using much smaller tubes. Perhaps drinking straws?

[@DIYWITHADD]

@@sabelch You are absolutely right it would be far more efficient with more pipes I just could not find any that were cheap. Straws would be an option but they are not long enough. I would like to use aluminum because it dissipates heat really well.

[@longbunly]

Why do we need to fan??

[@pafdias1]

hello, the second extractor does not have any functionality since it has no place to empty the air it extracts. check it out friend.

[@DIYWITHADD]

I get a lot of a little weird questions.Try watching the video before commenting on videos. The design is very simple and the function speaks for itself if you look closely. Thanks for watching

[@gerrygianan2654]

I felt dizziness just watching this😂😂

[@DIYWITHADD]

I hope you recovered well 😉. Thanks for watching

[@oldowl4290]

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.

[@DIYWITHADD]

Hi try to watch this videokzbin.info/www/bejne/f6abgmuBqcqsqMk it will surely be able to put things in perspective. Thanks for whatching

[@mattolsson8816]

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

[@DIYWITHADD]

With the budget in mind, this project has never been intended to have a good efficiency when it comes to heat recovery but it should be effective at replacing the air for which it is good. And if there is just a slight recycling of the heat then it is a win. And in my opinion, it is not at all possible to make a small (effective HRV) on a small bugget thanks for watching

[@mrmotofy]

Calculations are done by fan volume measured in CFM Cubic Feet Minute. Room HxLxW in feet equals cubic feet or volume of room. Then divide volume by the fan cfm and that's how many minutes it will take to completely exchange the room air. But fans also need equal intake to the room.

[@burnerjack01]

@@mrmotofy One needs to take into account the 'static pressure' of the system. "Ductulators" (charts that give you this information). No fan is 100% effective and the flow decreases with static pressure. In fluid pumping examples such as hydronics, the static pressure would be analogous to "Feet of head".

[@rangerdoc1029]

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

[@DIYWITHADD]

Hey OBrien333 The aluminum tubes is about 40mm they are from a autostore used in older cars with carburettors

[@illmtoloko]

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

[@DIYWITHADD]

I am currently using a usb charger 3volt, but have purchased a 12volt 20watt power supply that I need to have mounted. Thanks for watching

[@ipengsmart]

How it works?

[@DIYWITHADD]

Hey Bang Ipeng It works like all other HRV systems just not as efficient as the ones you can buy, but it is very cheap to make and uses very little power and is an efficient way to replace the air continuously. thanks for watching

[@jrx2662]

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.

[@DIYWITHADD]

You're absolutely right the fans are sitting too close together it was just the easiest way to do it. I have put a cardboard tube on one fan so they are a little further apart. Thanks for watching

[@manolitofrancisco6218]

How it works

[@DIYWITHADD]

kzbin.info/www/bejne/f6abgmuBqcqsqMk

[@dwiayuanggraini7208]

nice idea

[@DIYWITHADD]

Thanks 😁

[@sharonpalmis8358]

Wht is the purpose for this side fan area?

[@DIYWITHADD]

If you se my other video it might make sence kzbin.info/www/bejne/f6abgmuBqcqsqMk

[@davejalenderki]

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.

[@DIYWITHADD]

Thanks for the kind words 😃 I have already thought of it also bought a couple of speed controls I just need to figure out what it should look like before I start assembling and maybe make a nother video about it . thanks for watching 🌞

[@AlexViardo]

Can you share links to fan and electronics components?

[@DIYWITHADD]

Hey Alexander Viardo I used a USB charger and 2 120mm PC fans, I live in one of the countries with the biggest tax burden in the world so it is probably no advantage to shop where I shop. Thanks for watching

[@almazzainullin4430]

water condensation ?

[@DIYWITHADD]

I have not had problems with condensation so far. Thanks for watching

[@motorolasafi]

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

[@DIYWITHADD]

Try whatching this kzbin.info/www/bejne/f6abgmuBqcqsqMk

[@rcmechanic5351]

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.

[@DIYWITHADD]

Hey donnex44 sure i can make i smal opdate video of the HRV system. Thanks for watching 😁

[@DIYWITHADD]

kzbin.info/www/bejne/f6abgmuBqcqsqMk&ab_channel=DIYWITHADDDIYWITHADD

[@serba_serbi]

Super awesome...👍👍

[@DIYWITHADD]

Thanks! Serba Serbi

[@jirka825]

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

[@DIYWITHADD]

Why ? I youce the saw all over and have never had a saw like this attached to a table. Thanks for watching

[@je-fq7ve]

it is dangerous to cut rounds on the chopsaw without adding a decent fence for it to be stopped against.

[@DIYWITHADD]

I know. It is very dangerous but have tried it a few times, you do not see it in the video but the tube is double except where I cut, so there is more control over it than it may look like. I have had similar pipes that were completely destroyed due to instability in the pipe, but if you can strengthen the pipe by laying it double then it can easily be done if you are careful. Thanks for whatching

[@je-fq7ve]

@@DIYWITHADD it can be done as you say but the random woodwoker may not understand how to do it safely.

[@PavolFilek]

Great

[@oldmonkwins2083]

It looks like a NASA 🚀

[@DIYWITHADD]

🤣 Thanks for watching

[@OzvegyCsabiLibu-dz5qk]

Great job! :) Thanks!

[@DIYWITHADD]

Thanks for watching :-D

[@tristanwegner]

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

[@DIYWITHADD]

I agree 👍 but there are many different types on the market but they are way too expensive even the small ones like my prototype. It is so cheap to make if you have the right equipment and very simple. Thanks for watching

[@budiwaloyo8426]

aku hadir bosqu, siiiip bos semoga bermanfaat

[@felipelarios2931]

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

[@DIYWITHADD]

Hey Felipe Larios this video explain what is in and out ( kzbin.info/www/bejne/f6abgmuBqcqsqMk ) thanks for watching

[@felipelarios2931]

@@DIYWITHADD gracias ya lo vi

[@gt.81777]

where are u buying the fans

[@DIYWITHADD]

www.computersalg.dk/l/1345/kabinet-k%c3%b8ling This page was where I found the ones I use at the best price if you choose the Silent version that runs at low rpm then do not get 15volts on them because then they burn off 😒

[@Oktober20051]

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

[@DIYWITHADD]

I have specifically written that (It replaces the air very efficiently heat exchange is not overly good) I do not know how much it cools the room down you can compare with a window that is slightly open all the time, also I have chosen to use very low performance fans and only added 5 volts via usb to them to get the noise down to non-existent

[@johnchamberlain4125]

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

[@DIYWITHADD]

Hey John Chamberlain. I cant remember the dimensions but yes thats prittymuch what IT is I think the big pipe is 100mm. And Maybe the aluminium is 38mm. Thanks for watching

[@JodBronson]

Go with all plastic and don't use Metal or in this case Aluminum. Aluminum + Air = Bad Lungs !!!

[@DIYWITHADD]

@@JodBronson hey and Thanks for watching. I Will agree that you dont wont metals in your air but, i dont think that aluminium is breaking down to a point where you Will get IT in to your lungs just by moving air through IT but i respekt your opinion.

[@JodBronson]

@@DIYWITHADD - Small 'Particles' are the deadliest.

[@DIYWITHADD]

@@JodBronson I agree especially in stuff like vaccines why put aluminium in a vaccine.

[@minualunel9629]

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.

[@DIYWITHADD]

Hey Minu Alunel I would love to see that video if you made one ! I've also had the idea with Correx but like the idea of aluminum better. I would really like to change the core with some much smaller aluminum hoses but I have not been able to find anyone who sells them yet.

[@minualunel9629]

@@DIYWITHADD I really don't see the advantage with aluminium, you don't actually want a very good heat conductor that can transfer heat when the system is off.

[@DIYWITHADD]

@@minualunel9629 Aluminum is one of the best materials to absorb heat and cold that is why I use it but the setup could clearly be better, my system also runs 24 hours a day, it is not a passive system but the idea of one is interesting.

[@hgpkumar]

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

[@DIYWITHADD]

"I live my life a quarter mile at a time." Thanks for whatching.

[@v31.48]

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.

[@DIYWITHADD]

Impressive! Thanks for watching

[@mrmotofy]

Stores sell fans that fit in windows

[@DIYWITHADD]

@@mrmotofy I thought it was impressive I imagine someone standing outside with a leaf blower who then runs in to enjoy the fresh air and then repeats.

[@abhiescorts]

How much area it is suppose to ventilate.

[@DIYWITHADD]

Hey kumar nand About 10 square meters but it runs on 5volt USB phone charger the good thing about this project is that you can put just the fan you want on it and add the power you want to it, it all depends on whether you can sleep when it runs because of the noise. Thanks for watching

[@les6772]

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!

[@DIYWITHADD]

Hey les6772 the tubing is from a auto shop It is made fore old carburetet cars that need warm air from the exhaust to the air cleaner IT is cheap and comes in defferint sices sorry for my Spelling riting from my phone 😁 thank you for watching

[@MrOner07]

i think it would be better to suck COLD AIR IN AT BOTTOM... then to push HOT AIR OUT AT TOP..... because cold air is more dense than hot air

[@DIYWITHADD]

Thanks for whatching

[@grande6075]

I can not understand the working principle .

[@DIYWITHADD]

Try looking at this kzbin.info/www/bejne/f6abgmuBqcqsqMk