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Thread: Solar Attic Fan

  1. #1
    DIY Member Bill MD's Avatar
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    Default Solar Attic Fan

    I need to replace my attic fan. Recently I've heard of solar powered attic fans. Seems to me that installing one may be a good idea. I know that a solar fan will save electricity but costs more than fans that require external power. Anyone have any thoughts as to the pros and cons of solar fans?

    Thanks

  2. #2
    Retired Defense Industry Engineer jadnashua's Avatar
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    Depends somewhat on where you live. They typically don't move as much air as one you run off the grid, so you may need more than one. I've seen these, but have no idea how good they are...http://www.solatube.com/homeowner/solarstar_landing.php
    I do have one of their tubular skylights in my bathroom, and it worked out really well.
    Jim DeBruycker
    Important note - I'm not a pro
    Retired Defense Industry Engineer; Schluter 2.5-day Workshop Completed 2013, 2014

  3. #3
    Homeowner Thatguy's Avatar
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    You can get 100w per sq. meter of solar panel area, so maybe you get 1/7 hp.
    Last edited by Thatguy; 06-12-2009 at 10:49 AM.

  4. #4
    DIY Member Bill MD's Avatar
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    Thanks for the info. FYI, I live on the Maryland Eastern Shore. So the fan will run a lot during the summer.

  5. #5
    Homeowner Thatguy's Avatar
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    Quote Originally Posted by Bill MD View Post
    Thanks for the info. FYI, I live on the Maryland Eastern Shore. So the fan will run a lot during the summer.
    http://www.solarpanelsplus.com/solar-insolation-levels/
    Multiply by 0.1 to account for the inefficiency of photovoltaic cells.

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