Before You Buy Know These HVAC System Terms: AFUE, SEER, and HSPF

What do all those acronyms mean and why does terminology matter when you’re thinking of making an HVAC (Heating, Ventilation and Air Conditioning) purchase? The short answer is that these terms have a great deal to do with rating efficiency of the products — including air conditioners, furnace, and heat pumps — that are essential for home comfort.