The amount of heat a given quantity of refrigerant will absorb in changing from a liquid to a vapor at a given evaporating pressure.

The rate at which refrigerant is moving at a given point in a system, usually given in feet per minute (FPM).

An arbitrary concept which combines into a single value the effect of temperature, humidity, and air movement as sensed by the human body.

Name given to the end connections on precharged lines which screw on to mated fittings of the outdoor and indoor sections. Tightening the quick connections ruptures the seals on the fittings and the l [..]

Instantaneous evaporation of some liquid refrigerant at the metering device due to pressure drop which cools the remaining liquid refrigerant to desired evaporation temperature.

The amount of heat of fusion absorbed by melting 1 short ton (0.893 long ton or 0.907 t) of pure ice at 0 °C (32 °F) in 24 hours. Equivalent to the consumption of one ton of ice per day during the tra [..]

The substance, usually air or water, to which the heat in a condenser is transferred.

Air which contains no moisture vapor.

decibel A, B and C - Noise Rating (NR) curves, sound transmission, sound pressure, sound intensity and sound attenuation"> Acoustics

Used to measure pressure in inches of water.