An air conditioner controls the temperature, humidity, and general quality of the air in your home.
A natural gas furnace converts gas to heat.
Gas furnaces are the most popular choice for the majority of modern homes with central heating and air conditioning
Thermostats and controls can manage your energy use, adjust temperature and humidity levels.
Heat pumps move heat from one place to another. When it's cold outside, heat pumps extract outside heat and transfer it inside.