Space Heating Equipment: electric furnace, electric air-source
 heat pump, natural gas furnace, natural gas  hydronic,
 kerosene furnace, liquefied petroleum gas, distillate furnace,
 distillate hydronic, wood stove,  ground-source heat pump,
 natural gas heat pump.
Space Cooling Equipment: room air conditioner, central air
 conditioner, electric air-source heat pump, ground-source heat
 pump, natural gas heat pump.
Water Heaters: solar, natural gas, electric, distillate,  liquefied
 petroleum gas.
Refrigerators: 18 cubic foot top-mounted freezer, 25 cubic foot
 side-by-side with through-the-door features.
Freezers: chest - manual defrost, upright - manual defrost
Lighting: incandescent, compact fluorescent, mercury vapor
Clothes Dryers: natural gas, electric
Cooking: natural gas, electric, liquefied petroleum gas.
Dishwashers
Clothes Washers
Fuel Cells
Solar Photovoltaic