An opening through which outdoor air is drawn into a system.

A method of providing independent heating or cooling to different areas or rooms, typically controlled by separate thermostats.

A unit of measure used to describe the cooling capacity of an air conditioning system.  One ton of cooling is the amount of heat needed to melt a one ton block of ice in a 24 hour period.

The most common type of residential system, it consists of two main components – a compressor and condensing unit installed outdoors, and an air-handler installed indoors.

The air drawn into the heating unit after having been circulated through a room.

A rating that expresses the efficiency of air conditioning equipment throughout an entire average cooling season, including both the hottest and coolest days. It stands for Seasonal Energy Efficiency [..]

A grille and damper assembly that covers the opening or end of an air duct.

An HCFC (hydro chlorofluorocarbon) refrigerant, often referred to by a brand name such as Freon®, used primarily in residential air conditioning systems. It is being phased out for its higher global w [..]

A non-ozone depleting refrigerant that has replaced R-22 as the preferred refrigerant of choice in the U.S., Japan and Europe.

A measure to determine heat gain and loss within a structure so that properly sized HVAC equipment can be installed.