Cupro-nickel : 90% copper / 10% nickel alloy which has high corrosion resistance to water containing salt, sulphur, chlorides and other dissolved minerals.

Desuperheater : A heat exchanger and pump system which removes a small portion of heat from the compressor discharge gas and typically transfers it to a domestic hot water tank.

EWT : Entering water or fluid temperature.

Full Package : Self contained heat pump which has blower and compressor section integrated into one unit.

Full-Condensing Heat Exchanger : A heat exchanger with enough surface area to condense all the hot refrigerant gas produced by a heat pump to it's liquid state thereby transferring the all the heat produced by the unit.

Mechanical Cooling : Conventional cooling provided by an compressor operated refrigeration device. Term can be interchanged with "active cooling".

Oversized Evaporator : A technique of employing a larger than normal evaporator (heat absorbtion device) in a geothermal heat pump in order to obtain greater heat exchange and thus better performance from the unit.

Turbotec® : Tradename for a high efficiency expanded surface style coaxial tube-in-tube heat exchanger.