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Kaleva

(38,771 posts)
13. A number of videos on youtube brag about the temp rise from their design but...
Sat May 2, 2015, 06:28 PM
May 2015

Last edited Sat May 2, 2015, 07:57 PM - Edit history (1)

do not mention the actual btuh output. The few that do give enough info to figure it out leads me to believe that solar air heaters are not worthwhile for me to build and install, at least where I live (Upper Michigan), in the hope that I MIGHT get enough heat from such a device to maintain a comfortable temperature in a small room from around noon to mid afternoon on a clear, sunny, midwinter day.

However, that being said, I think they could be useful in the fall and spring when the temperature differential is much less so far fewer btuhs are needed to maintain a comfortable temp inside the home. With more daylight hours in the fall and spring and as most designs are inexpensive to build, I might make one and install it in my small house in town.

Edit: Here is a link to a site that has a btu calculator where one can change the outdoor temperature.

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Latest Discussions»Support Forums»Frugal and Energy Efficient Living»"Fredericton man bui...»Reply #13