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A kitchen hood in a small apartment. A kitchen hood, exhaust hood, hood fan, extractor hood, or range hood is a device containing a mechanical fan that hangs above the stove or cooktop in the kitchen. It removes airborne grease, combustion products, fumes, smoke, heat, and steam from the air by evacuation of the air and filtration. [1]
Ductless fume hoods, also known as recirculating [16]: 502 or self-contained hoods, [8]: 160 are units that do not extract air out of the building or work environment. Rather, air is sucked through the front opening of the hood and through a filter, before passing through the fan mounted on the top (soffit) of the hood or beneath the worktop ...
Minisplit ductless systems are used in these situations.) Outside of North America, packaged systems are only used in limited applications involving large indoor space such as stadiums, theatres or exhibition halls. An alternative to packaged systems is the use of separate indoor and outdoor coils in split systems. Split systems are preferred ...
Advantages: Simple mechanical and control design ("SPST thermostats") Redundancy: If one zone furnace fails, the others can remain working; Disadvantages:
Duct leakage test in the US. A duct leakage tester is a diagnostic tool designed to measure the airtightness of forced air heating, ventilating and air-conditioning (HVAC) ductwork.
A heat pump in combination with heat and cold storage. A ground source heat pump (also geothermal heat pump) is a heating/cooling system for buildings that use a type of heat pump to transfer heat to or from the ground, taking advantage of the relative constancy of temperatures of the earth through the seasons.