HVAC and BEMS

Supply Air

Supply Air Temperature

Smoke Damper

A measure of seasonal or annual efficiency of a central air conditioner or air conditioning heat pump.  It takes into account the variations in temperature that can occur within a season and is the average number of Btu of cooling delivered for every watt-hour of electricity used by the heat pump over a cooling season.

Any device that receives a signal or stimulus (such as heat, pressure, light, or motion, etc.) and responds to it in a distinctive manner.

A thermostat that can be set to automatically lower temperatures in an unoccupied house and raise them again before the occupant returns.

A collection of computer programs, procedures, and documentation that perform some tasks on a computer system.

A SPDT switch has one common terminal and can connect to one of two other terminals.  This allows it to control a single circuit with two different outputs.

The weight of water vapour, per unit weight of dry air.

HVAC term for an air conditioning system that comes in two (2) to five (5) pieces: one (1) piece contains the compressor, condenser, and a fan; the others have an evaporator and a fan.  The condenser, installed outside the house, connects to several evaporators, one (1) in each room to be cooled, mounted inside the house.  Each evaporator is individually controlled, allowing different rooms or zones to be cooled to varying degrees.