Need opinions on solar heating possibilities

[CarlD]

Thanks Carl. I have great sun, but only enough room for 4 4X8 panels which would give me about 128 sq ft, I'm not sure if that is going to be enough.

Well, that's if you want ALL the panels on the roof. If you have long, hot, clear days it will add a good bit of heat--even if you have a heat pump it will run more efficiently.