liquid formed by condensation of a vapor. In steam heating, water condensed from steam; in air conditioning, water extracted from air, as by condensation on the cooling  

change of state of a vapor into a liquid by extract­ing heat from the vapor 

heat exchanger in which vapor is liquefied by the rejection of heat to a heat sink. See also condensing unit.

amount of heat energy rejected to its surround­ings by a condenser.

machine specifically designed to condense refriger­ant vapor to a liquid by compress­ing the vapor in a positive-displacement compressor and rejecting heat to a cooling medium. The unit consists usually of one or more positive-displace­ment compressors, motors, condensers, liquid recei­vers (when required), and necessary accessories, mounted on a common base.

      condensing unit refrigerating effect

rate of heat removal by the refrigerant assigned to the condensing unit in a refrigerating system. This is equal to the product of the mass rate of refrigerant flow produced by the condensing unit and the difference in the specific enthalpies of the refrigerant vapor entering the unit at a specified superheat, and the refrigerant liquid leaving the unit at a specified subcooling.

on a psychrometric chart the infinite number of wet- and dry‑bulb temperatures which will satisfy the require­ments of an air supply for a given room temperature.

space within a building provided with heated or cooled air, or both (or surfaces); and, where required, with humidification or dehumidification means, to maintain condi­tions for an acceptable thermal environment. Compare uncondi­tioned space.

sum of the degree-days for cooling, using a common base of 75°F (25°C in Canada), is used with other factors to evaluate the energy require­ments of a cooling season