A component of a home energy system that shows system status and environmental benefits in real time.

The indoor part of an air conditioner or heat pump that moves cooled or heated air throughout the ductwork of your home. An air handler is usually a furnace or a blower coil.

An industry trade association that develops standards for measuring and certifying product performance. For instance, ARI Standard 270 provides guidelines for establishing sound levels for outdoor air [..]

An industry trade association that develops standards for measuring and certifying product performance. For instance, ARI Standard 270 provides guidelines for establishing sound levels for outdoor air [..]

A measure of furnace heating efficiency. The higher the AFUE, the more efficient the furnace.

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

A measurement of heat energy. One Btu is the amount of heat required to raise one pound of water by one degree Fahrenheit. The higher the Btu rating, the greater the heating capacity of the system.

British thermal units per hour.

An odorless, colorless, tasteless, poisonous and flammable gas produced when carbon burns with insufficient air.

An odorless, colorless, tasteless, poisonous and flammable gas produced when carbon burns with insufficient air.