Gallons Per Hour. You might see this rating if you are looking at an oil furnace. In addition to input and output, an oil furnace also has a rating of gallons per hour, the volume of oil a furnace is [..]

This is a percentage measurement of a furnace's heating efficiency. The U.S. government's minimum efficiency level is 78%. The higher the AFUE, the more efficient the furnace. The initials s [..]

This is the indoor section of a split system. It can be a dedicated air handler, or could be your furnace. Also known as a fan-coil.

Air-Conditioning, Heating and Refrigeration Institute. AHRI is an industry trade association that develops standards for measuring and certifying product performance. For instance, AHRI Standard 270 p [..]

The distribution or movement of air.

This is the air temperature (usually the outdoor air temperature) surrounding the equipment.

Microscopic living organisms suspended in the air that grow and multiply in warm, humid places.

British Thermal Unit. This is the amount of heat required to raise the temperature of one pound of water by one degree Fahrenheit. You'll see this measurement when you look at heating and cooling [..]

Offered by GelaSkins, these removable coverings for the Comfort Sync thermostat protect the thermostat from scratches and damage, and integrate with the thermostat’s screen saver to form a customizabl [..]

This is the outdoor section of a split-system air conditioning system. You'll know it best as the air conditioner that sits outside your home.