Solar Heater or Solar Furnace for home heating
This video shows some details of the results of my home made solar home heater I built from ideas i got from the web and other youtubers.
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Thats a cool setup. Way to beat the dirty utility company.
@wushujia they dont.may work backward. one has close the vents with something.. cold air in the box will drop in the box then into the house being replaced at the top by warm house air.
@ssiaudio thank you, actually I’d like to use it in a Green house when needed. should work ok as an additional heater.
@wushujia The unit runs on the heat from the sun. At night it offers not benifits. This unit is just a help on sunny days. Most of my heaters shut off when this thing gets going on a sunny day. even when it is -30 celcius or colder. Does this answer your question? Let me know if I can help in any other way.
ssiaudio 5 days ago
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@vpbubbies Right, as I said, I meant glass is free, if you find it being given away, I have had no problem getting patio doors for free, it does not get cheaper than free.
Good tip Window & door company, thanks
@CTOL1 Glass is NOT “cheap”,,, its “FREE!!”, you just need the know. Go to any window & door company, they install new patio doors every day and just throw out the glass from the old patio doors, in fact, they actually pay to have that glass disposed of, so just ask them for it, tell them what your making & Im certain they’ll give you more then you’ll ever need.
@ssiaudio Yes it does, I wanted to know a way to run heater at night. I guess the only way to do it is have a powerful enough solar + inverter system that can run a heater at night. A good size solar panel system can run AC there is no reason it cant run heaters. I guess I will have to try it out to know for sure.
how do these work at night?
You know what is so wrong about solar installations?? Never install anything on roof or on the exterior walls because they create shadows . This is a minus. All solar installations must be sited away from the house in order to maximize natural exposure to the Sun. Same goes for any trees that cast shadows on your house should be cut down. This is a very important efficiency factor in everything solar. I recently cut down a row of 60 foot tall Italian cypress trees to elminate shadows.
There were no guides other than watching youtube videos and using my own ideas.
Hey, where did you get the guide from to build this solar air heater?
my idea was this, and no one has tried this i guess, build a box in the yard all 5 sides have glass and use your vent pipe and make it loop around inside the box and have an insulated pvc pipe maybe 2 of them underground run to your house or where you want to heat with an electric fan. yes you loose heat in the pipe but you gain more heat with a 5 sided box let the bottom 6h side be black maybe even put mirrors on the bottom and paint everything inside black. do you think it would work since you
-20c=-4f 44c = 111.2f 22c=71f
-17c = 1.4f 21c = 69.8f 44c=111.2f
Glass is cheap and found given away by many do it yourself week end home re-modelers, just search craigslist . o r g in your area.
A common two pane window has an r value of 3.0 where glass itself is 1.0 (Not good) you do not want tinted or “solar guard ” type glass, as it is designed to keep the heat OUT. Polycarbonate G.E’s trade name Lexan is great stuff, but I would reserve it for solar electric projects, unless you are well off $ wise.
Nice job, I need to put one together “still”
Oh ya I almost forgot, never use plexi glass or any type of acrylic material, it will warp, melt, fog, drycrack, haze, etc.etc.
that is not as good as it sounds. polycarbonate is superior to glass as far as heat transfer, glass transfers heat like sh#t through a tin horn. That’s why they have to double or triple the panes, even the scam of argon inside the layers increases the R value by an insignificant amount. 1/4 inch polycarbonate is the way to go, you can drill it to mount it much easier than glass, It weighs alot less making the construction of the entire unit much lighter and eaiser to install, and overall save $
@ssiaudio I’d try sticking insulation or pillow stuffing in there for now.
Just a thought but anyone thinking of making one of these should contact a glass company about 1″ insulated glass. I build commercial buildings and they frequently screw up the sizes of the glass or there is a change in the building that causes them to have extra peices. Frequently they trash them but sometimes they hold on to them for selling at a discount. I bet 1″ insulated glass on the front would boost the temp significantly as long as it didn’t have a coating on it.
I think adding something for turbulence is not needed. what that would do would make it harder to move air out of the unit and into your house. with higher temperatures in the unit you get MORE heat loss to the outside (higher temperature differential).
moving more air through the unit leads to less losses and also more heat and more even heat transferred to the house.
I do have to block it for now. Can’t think of a good way to keep the cold out.
wow thats pretty impressive… do you have to stop it or seal it off at night?
what cfm fan r u using?i use a snap disc controller on mine with an 80 cfm fan that gets me a 15-20c temp change. can u give me some examples of the hot air temp being blow out of your box and the intake temp along with maybe the outdoor temp. I used pop cans but maybe will try the dryer vent like yours. thanks
craig
Glad to hear it is working for you. The plastics I had trouble with were covering the top and bottom headers, I swapped that out for aluminum sheeting. My acrylic has never warped.
Just installed mine a few days ago – i get 238 F out of it — and i am getting warpng also – so i had to place the screws in the acrylic about every 5 inches apart
Doing pretty good now