Plasma in its simplest form is oppositely charged hydrogen and oxygen ions, also called bi-polar ionization. These naturally occurring ions are artificially produced when a sufficiently high voltage i [..]

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Annual Fuel Utilization Efficiency. Indicated as a percentage, your furnace's AFUE tells you how much energy is being converted to heat. For example, an AFUE of 90 means that 90% of the fuel i [..]

Type of compressor that uses a more efficient process for compressing refrigerant for better cooling efficiency

The portion of your air conditioner or heating system that forces air through your home's ductwork.

British Thermal Unit. Used for both heating and cooling, BTU is a measure of the heat given off when fuel is combusted. Or for cooling, it's a measure of heat extracted from your home. (One BT [..]

A British Thermal Unit (BTU) is the unit of heat required to raise 1 pound of water by 1 degree Fahrenheit. BTUH is British Thermal Units per Hour.

A burner assembly within your oil furnace. This burner provides good combustion of heating oil.

Stands for Cubic Feet per Minute. A measurement of airflow that indicates how many cubic feet of air pass by a stationary point in one minute. The higher the number, the more air is being forced throu [..]

The ability of a heating or cooling system to heat or cool a given amount of space. For heating, this is usually expressed in BTUs. For cooling, it is usually given in tons.