Ive seen houses with old solar collectors that are full of unsightly algae. Can that be avoided?
Yes. The technology has made huge strides since then. For example, our solar collectors use propylene glycol instead of water. Propylene glycol is a more efficient heat transfer agent, it doesn’t freeze, and algae won’t grow in it. It is safe and nontoxic. And of course, the collectors look great on your roof.
