Electrical power, also expressed as “W.” For example, a 100W globe consumes 100 Watts of electrical power. The W in Watt is always uppercased, because it is named after a person.

A home may be divided into several different areas, or zones, to better control the temperatures throughout the house. The process of dividing your home into different zones is called zoning.

The ton ratings you see here have nothing to do with the weight of the unit. In fact a ton is simply 12,000 BTUs (see BTU definition on this page). A typical home cooling/heating system uses heat pump [..]

A home comfort system that uses an indoor and an outdoor component to deliver comfortable air to a living environment.

A temperature-measuring device used to control the operation of home comfort systems to maintain a comfortable temperature within the house. Programmable thermostats allow you to program different tem [..]

Seasonal Energy Efficiency Rating. Used to express the efficiency of an air conditioning unit, or a heat pump in cooling mode. The higher the SEER rating, the more efficient the unit. The Department o [..]

If a unit uses 1,000 Watts in 1 hour, it is said to have an energy rating of 1kWh.

Equipment in which all heating and cooling components are located in one cabinet. Installed either beside or on top of a home or business.

Split-system home comfort systems use two main components to deliver air for a comfortable living environment. The indoor coil is the device responsible for transferring heat from indoors to the outdo [..]

Heating, Ventilating and Air Conditioning. Used to refer to the industry at large, particularly dealers of heating and air conditioning equipment.