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Definitions (67)
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absolute humidity
Actual mass of water vapour in the air per unit volume.
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air conditioner
An air conditioner is a type of heat pump in which heat is removed from the indoor air and rejected to the outdoor air, thereby conditioning the air in the home by reducing its temperature and humidit [..]
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air handler
Part of the heating and cooling system that conditions and circulates air, often in a large metal box containing a blower, heating/cooling elements, filters, sound attenuators, and dampers. They are u [..]
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air source heat pump
A heat pump system that pulls heat from or rejects heat to outdoor air, usually through the use of a fan and heat exchanger unit installed outside. Air source heat pumps function much like ground or w [..]
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boiler
A boiler is a closed vessel that is used to heat a fluid, typically water, and circulate it through a closed loop for various heating applications. Boilers generally use natural gas or propane as fuel [..]
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british thermal unit
A British thermal unit is a measure of energy and is equal to approximately 1055 joules. In the HVAC industry, BTUs are used to describe heat energy. A BTU is defined as the amount of heat energy need [..]
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british thermal unit per hour
A British thermal unit per hour is a power measurement. In the HVAC industry, it is typically used to describe the output capacity of a heating system or the amount of heating power required by a buil [..]
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buffer tank
A storage tank used to increase the overall thermal mass and storage of a system. This helps to deal with the drastic variations of heating and cooling loads of a building throughout the year and grea [..]
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circulator
A pump used to circulate a fluid in a closed circuit. These pumps only need to overcome the friction losses of the piping in the system. Circulators are commonly used in hydronic heating and cooling a [..]
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coefficient of performance
The ratio of the heat energy delivered by a heat pump to the amount of electrical energy consumed by its components (compressor, pumps, fans, etc.). The COP is a measure of heat pump efficiency, and v [..]
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