Quote:
Originally Posted by Piwoslaw
Would adding mirrors to a solar heater increase it's efficiency? Mirrors are cheaper per area unit than solar collectors, but how efficient are they at reflecting heat? Would too much focusing too much (how much?) sun on a collector be harmful?
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I have used a sheet of foil faced building paper clamped between 2 thin sheets of polycarbonate mounted behind a solar hot water panel to give an added boost in the winter months when the sun is lower on the horizon. The gain in hot water was approx 15%. In the summer it has little effect as the sun is much higher in the sky.
Cheers
Mike