DIYbanter - View Single Post

On 23 Nov 2005 17:32:26 -0800, wrote:

Why install an array of highly priced commercial
panels/tubes, [...]

Because a passive system really needs to be designed into the building
when it's built (or extended).

Because a flat panel system works well in wam weather but very badly in
cold sunny weather. It may still capture plenty of solar heat, but it
also has losses too high for effective use in our climate, year-round.