Glossary of Applied Air HVAC Terminology

A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
HCFC (Hydrochlorofluorocarbon)
A class of refrigerants. Generally refers to Halogenated Chlorofluorocarbon family of refrigerants.
Heat Exchanger
This is a device that enables furnaces to transfer heat from combustion safely into breathable air. The primary heat exchanger transfers heat from combustion gases to the air blowing through the ductwork.
Heat Gain
The amount of heat gained, measured in BTU's, from a space to be conditioned, at the local summer outdoor design temperature and a specified indoor design condition.
Heat Loss
The amount of heat lost, measured in BTU's from a space to be conditioned, at the local winter outdoor design temperature and a specified indoor design condition.
Heat Recovery Ventilator (HRV)
This device bring fresh, outside air into a building while simultaneously exhausting stale indoor air outside. In the process of doing this, an HRV removes heat from the exhaust air and transfers it to the incoming air, pre-heating it.
HFC (Hydrofluorocarbon)
A class of refrigerants. Generally refers to Hydrofluorocarbon family of refrigerants
Humidifier
A device that adds moisture to warm air being circulated or directed into a space.
Humidity
The amount of moisture in the air. Air conditioners remove moisture for added comfort.
Humidity Sensor
A device designed to regulate humidity input by reacting to changes in the moisture content of the air.
HVAC
Heating, Ventilating and Air Conditioning