Is Cedar Rapids, Iowa's climate amenable to having sunrooms create solar gain during the winter? We have an unobstructed south-facing dining room, kitchen, and master bedroom and bath which could all open onto it. Total available length is about 50 feet. I assume passive solar is cheapest but don't know if it would work compared to some simple active solar design.
I recently purchased a grand 1907 Craftsman in Cedar Rapids. The windows in the entire house are painted shut! What is the fastest way to open up those old windows? I don't want to replace them or damage them, of course.