Glossary
Air Conditioning and Heating Terms
T
Tankless Water Heater
A water heater that heats water before it is directly distributed for end use as required; a demand water heater.
Temperature Zones
In HVAC individual rooms or zones in a building where temperature is controlled separately from other rooms or zones.
Therm
A unit of heat containing 100,000 British thermal units(BTU).
Ton (Air Conditioning)
A unit of air cooling capacity; 12,000 Btu per hour.