I am looking at either a PV system or solar hot water. Which has the biggest ROI?

— Terry Luttrell Harsens Island, MI

Answered by Paul Rosen on March 21, 2012

How best to heat an Arizona two-story home?

— Ted Queen Creek, AZ

Answered by Rich Franz-√únder on March 21, 2012

Should I get a heat pump with or without a RCC?

— peakproducts Germantown, TN

Answered by Rich Franz-√únder on March 21, 2012