Energy.gov

Regular maintenance extends the life of your air conditioner and helps it run as efficiently as possible.

Your choice of heating technologies impacts your energy bill. Learn about your options, from active solar to portable heaters.

Ductless mini-split air conditioners are a good choice if you want a zoned air conditioning system but have no ducts in your house.

In warm climates with low humidity, evaporative coolers can be a cost-effective cooling strategy.

Air conditioners work much like a refrigerator, transferring heat from the interior of your home to the outside.

Room air conditioners can be a cost-effective strategy for cooling one room or part of a house.

Live in a cold climate, but get lots of sun? Active solar heating may be the most efficient option for heating your home.

Say goodbye to cold floors in winter. Radiant heating can be a comfortable and efficient heating choice.

Insulating, air sealing, and placing ducts within the conditioned space of your home will reduce energy losses.

Choosing the most effective cooling options for your climate saves money and improves comfort.

Geothermal heat pumps are expensive to install but pay for themselves over time in reduced heating and cooling costs. Find out if one is right for your home.

Most Americans heat their homes with a furnace or boiler, and high-efficiency models of all types of furnaces and boilers are available. Is it time for an upgrade?