A unit of measurement used for determining cooling capacity. One ton is the equivalent of 12,000 BTUs per hour.

A device in a heat pump that reverses the flow of refrigerant as the system is switched from cooling to heating. Also called a reversing valve or four-way valve.

The Air Conditioning and Refrigeration Institute performs tests and assigns a Sound Rating Number (SRN) to units. A lower SRN rating indicates a quieter unit with average SRN's of between 74dB an [..]

Seasonal Extreme Environmental Test. It's the American Standard torture chamber for heating and air conditioning systems, where five years of service are condensed into 16 torturous weeks.

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

Set of two Copper lines used to transfer the refrigerant between the outdoor unit and the indoor unit. Some times referred to as the line set.

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 liquid used to absorb and transfer heat from one part of the home comfort system to another.

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

The most advanced furnace technology available today. This break through technology can keep temperatures throughout your house constant. As constant as one-half of one degree of your thermostat setti [..]