On 10/25/2017 09:10 PM, James Wilkinson Sword wrote:
Even if they only capture 30%, if it's winter and you're heating your home, then you're taking 30% of the sunlight IR gain away from the windows, then redirecting that to electric heaters,
which gives you nothing whatsoever.

I use R5 drapes in the winter.

What if we used the juice to power a heat pump?