Heating that won't burn through your bank account. It doesn't matter whether you use oil or gas heat, American Standard has a range of furnaces that will bring efficient warmth to your home. Our furnaces have AFUE ratings from 80% up to 93% which means that at least 80% or more of the fuel you pay for is actually converted into heat for your home. Gas furnaces Every model in our Freedom® furnaces family is designed to provide maximum heat for minimum fuel usage. The ultimate models even reduce temperature swings and short cycling. And our oil furnaces are durably constructed with only the finest materials and components. So you can rest easy. And warmly. Oil furnaces Freedom® 80 oil furnaces heat your home quickly and efficiently, even during the toughest winters. An AFUE rating of up to 82.7% ensures a miserly use of fuel, and our ultimate models offer a reliable variable speed blower motor that goes the extra mile in quietly, efficiently and evenly distributing heated air throughout your home. Freedom® 90 Gas Furnaces Freedom® 90 Comfort-R!" Variable Speed Furnace Quiet, efficient variable speed comfort and humidity control. Freedom® 90 Two-Stage Furnace Uses a minimum of fuel for all the heating you need. Freedom® 90 High Efficiency Single-Stage furnace Single-stage heating that makes every dollar count. Freedom® 90 Single-Stage Furnace Quiet, efficient, affordable heating.