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Re: Solar air heaters



Michael O'Brien <obrien@hevanet.com> wrote:

>Don't put the collector on an outside wall and leave out the insulation!
>Problems may result--
 
>1--the integrity of the exterior weatherproofing may be compromised by the
>collector fasteners, and rain or snow that gets in behind the collector
>will leak into the wall cavities.

Caulk.

>2--the exterior wall will be warm when there is sun on the collectors, but
>at night or on overcast days will be cold. That will be a comfort problem
>inside the house, and in a cold climate, may lead to condensation of water
>vapor inside the wall cavities.

Hanging a frame on the outside of the existing wall will make it no
worse in this respect. In fact, it should improve these matters. 

Nick


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