Glossary of terms used on this site

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C

Term Definition
CFM

Cubic feet per minute of air flow.

Check Valve

A check valve is a mechanical device normally applied to a piping system which allows fluid to flow in only one direction.

Closed Loop

An underground heat exchanger piping system usually of polyethylene or polybutylene designed to allow the extraction or rejection of heat to the earth by the circulation of fluid within the tubing.

Coefficient of Performance (COP)

Heating capacity divided by electrical energy consumed. (e.g.15 kW output / 4.5 kW input = COP of 3.3) The coefficient of performance of a heating system is the electrical ratio of the heat we get out divided by the heat we put in.

Comp.-Wats

Compressor electricity consumption.

Compressor

Refrigeration component which increases the density, temperature and pressure of entering refrigerant through compression and discharges a hot dense gas.

Cond.

Freon temperature on condenser side.

Condenser

The heat rejecting mechanism in a heat pump usually in the form of a refrigerant-to-air coil or a refrigerant-to-water coil. Refrigeration heat exchanger where the refrigerant gives up its heat during condensation from a vapor to a liquid.

Cupro-nickel

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