welcome to Season Control glossary page
AIR HANDLING UNIT
A central unit of your HVAC system usually located inside the house consisting of heating and cooling elements,
a blower, filter racks or chamber, dampers, humidifier and other central equipment in direct contact with the airflow,
all in a single cabinet. The term also refers to the furnace, if that is the heating element of the system.
British Thermal Unit:
a unit of energy, equal to the amount required to raise the temperature of 1 pound of water by 1 degree Fahrenheit, or to 1 Kj (Kilo-joule).
This amounts to the heat put out by one whole burning wooden match.
The coil functions much like a car radiator.
It transfers heat to and/or from the air and consists of copper or aluminum tubing interconnected with plating.
Inside are liquid or steam, constantly circulated by an electric motor.
Sometimes the coils are split in two – an evaporator coil for cooling the inside air and a condensing coil heating the outside air.
The outdoor – and usually hot – part of an air conditioner system or heat pump.
Consists of a single cabinet housing a compressor, a coil, a fan, and other smaller components.
The condenser dissipates heat removed from the house into the outside air.
Sometimes condensers can run in reverse as part of a heat pump, cooling the outside air and sending the heat inti the house.
A component of an HVAC system that adds heat to air or to an intermediate fluid by burning fuel
(natural gas, oil, propane, butane, or other flammable substances).
Usually coupled with a blower that is designed to deliver heated or
cooled air into the home and spread it to different rooms via the duct system.
A general term referring to a part of a system transferring heat from hot parts to cold parts of the system, e.g.
from the burning fuel of a furnace or the hot water of an air handler to the air,
or between your home and the outside air (i.e. the condenser or evaporator coil).
A type of air conditioning system that can be run both ways,
either extracting heat from the inside a building and dissipating it outside,
or extracting the heat from the outdoor air and dissipating it to the inside.
While heat naturally flows from a hot place to a colder place,
a heat pump compresses air and thus moves heat from a cold place to a warmer place.
Acronym for Heating, Ventilating, Air Conditioning. Usually interchangeable with ‘heating and cooling system.’