Comfort-Aire offers a expansive line-up of energy efficient, state-of-the-art residential products. We offer several gas furnace models that have an AFUE rating at or above 95%, qualifying them for the federal tax credit. We're in industry leader in geothermal/water source heat pumps, many of which also qualify for the federal tax credit. For versatility combined with high efficiency, check out our line-up of mini-splits. All of our products feature the environmentally friendly R-410A refrigerant.