solar electric heater -My solar powered heater – Free heat

October 10, 2012 – 9:24 am

Heat ** for free home? You bet, the sun heats the collectors, once it reaches 80 degrees – the thermostat is on – the fan does my solar electric system. It makes all the heat, but it helps to integrate the heating costs. CORRECTION: The date is January 26, 2010

** Demonstration model of a solar windowbox air heater with solar electric fan assist.

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  1. 30 Responses to “solar electric heater -My solar powered heater – Free heat”

  2. SORRY, NO
    

    By MSGDREWRY on Oct 10, 2012

  3. great quick video! I was thinking of doing something like this inside my window. Do you have a construction video of making the box and the solar powered fan?

    By JimboJitsu on Oct 10, 2012

  4. You made a mistake. Remove the two horizontal boards that are attached two the cans. They are blocking the air that should be flowing over the surface of the tubes. You will get much higher temps without those boards.

    By greggh on Oct 10, 2012

  5. Here is an improvement… take waste black pipe… fill it with used motor oil that you get drom next oil change… fill pipes and seal and cap…

    Place those in your window box.

    Get a small 12V computer fan, use this instead of your 110V duct fan… and run it from a small solar powered panel. Now you get same… but hotter, free no electricity usage, and the oil tubes maintain a higher temperature for longer.

    By GotScout on Oct 10, 2012

  6. Curious how hot it was outside that day?

    By madwilliamflint on Oct 10, 2012

  7. I’m interested in building one of these myself, I was wondering what the outside temperature was the day you took the test? And what kind of temps do you get out of it in the winter.

    By DrFrankensteam on Oct 10, 2012

  8. i got all the gears from a bunch of old dvd players. you will have to do a bit of math but if u want to build it for dirt cheap, it beats spending another $80+ for an electronic solar tracker. copper melts at 1997F so the oil will keep it from melting. u can always just reduce the size of your mirror to limit heat output. i havent figured out the formula yet, but depending on the square footage of the house, will determine the size of the mirror. MIT recently copied this idea of mine and built 1

    By jlpMedia1 on Oct 10, 2012

  9. a video?? just build it..i used copper pipe, engine oil and mirrored plexiglass. put the plexiglass mirror in a parabolic bowl. put that in the oven so the glass takes that shape, drill a hole in the center. build an oil filled radiator from the pipe and have one of the ends feed through the center of that hole. as for the solar tracker(to change position of the mirror..i took a 12v phone charger and hooked it up to an electric motor that drove a series of worm gears(for torque)

    By jlpMedia1 on Oct 10, 2012

  10. hey, I’d like to see a video on that one! sounds cool

    By MSGDREWRY on Oct 10, 2012

  11. the box puts out the same amount of heat a window would of equal size. it just concentrates the heat of the boxes surface area into a smaller area. I’ve gotten my version of this solar heater hot enough to boil water. The application for this would only be ideal for cooking food or boiling water. My second solar heater got up to 2000F and parts were <$80…

    By jlpMedia1 on Oct 10, 2012

  12. Thanks for the info. I’ve seen people use in their greenhouses, 2 liter soda bottles painted black filled with water. The bottles absorb the daytime heat and release it after the sun goes down. I don’t know how many bottles you would need but it is passive and you could avoid the extra electrical load.

    By MrAnthonyRizzo on Oct 10, 2012

  13. this is in a pretty big room so it is to supplement the furnace – not replace it
    it will run until the temp in the box drops below 80 degrees – this depends on how cold it is outside
    I haven’t thought of a heat sink inside but it’s a pretty good idea since the temp is so high coming out of the box
    maybe duct it thru a box inside the room – but would need an blower in it after the box stops blowing

    By MSGDREWRY on Oct 10, 2012

  14. Very nicely done! How much of a space does it heat and for how long once the sun goes down? What form of thermal heat sink could you use indoors to extend the heating cycle after dark?

    By MrAnthonyRizzo on Oct 10, 2012

  15. AS LONG AS THE BOX IS MORE THAN 80 DEGREES IT WILL PUMP AIR INTO THE HOUSE  – OTHERS WILL PUMP AS LONG AS THE OUTSIDE AIR IS WARMER THAN THE AIR COMING IN

    By MSGDREWRY on Oct 10, 2012

  16. Say the sun heated it all day. How long could it go before needing sun again?

    By kidjr27 on Oct 10, 2012

  17. It only works when the sun heats it up

    By MSGDREWRY on Oct 10, 2012

  18. Does it need sun daily to work?

    By kidjr27 on Oct 10, 2012

  19. Well then that makes you a gal darn super hero.

    By primoknoxville on Oct 10, 2012

  20. EVEN IF IT’S COLD OUTSIDE, THE BOX WILL GET HOT INSIDE

    By MSGDREWRY on Oct 10, 2012

  21. How does it work when it’s not  80 degrees outside.

    By primoknoxville on Oct 10, 2012

  22. Yes, as long as the sun is shining it will heat up and it has no parts to freeze. (why would I want a heater in the summer? lol)

    By MSGDREWRY on Oct 10, 2012

  23. Does it still work during winter?

    By jdcc061 on Oct 10, 2012

  24. go ahead, it’s a simple weekend project – just because you have to let the paint dry. I only used one sheet of plywood to do it. I think it will be cheaper with downspouts too.

    By MSGDREWRY on Oct 10, 2012

  25. great job. I’ve been wanting to make a similar one for a year or so.

    By bob21801 on Oct 10, 2012

  26. there are lots of them – just search for solar water heater

    By MSGDREWRY on Oct 10, 2012

  27. thanks for info

    By freevideos051 on Oct 10, 2012

  28. hi try filling it with loose pop cans painted black will up temp mine went from outside temp of 50 degrees to 170 degrees in heater cool stuff watch my video

    By richallenmusic on Oct 10, 2012

  29. I’m going to a variation of this, great idea.

    By shpilk on Oct 11, 2012

  30. filter..hmm..ill have to check it out…

    By centervilletn on Oct 11, 2012

  31. Interesting application. Thank you for sharing your technology with us.
    A practical problem I have is that the rooms at the sun-side of the house are warm enough, also in winter.
    The rooms that do not receive any sunlight until 16.00 in the afternoon are dounting cold. Your technique of using the inside air being heated up and returned, can be used in a solar panel that you attach to the roof; a seperate in- and outlet are to be made in either the wall or window.

    By 321ozzy on Oct 11, 2012

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