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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]
Energy costs for a typical hood can range from $4,600/year in Los Angeles to $9,300/year in Singapore based on differences in cooling needs. [30] The bulk of the energy that fume hoods are responsible for is the energy needed to heat and/or cool air delivered to the lab space.
30: Temporary metal fences: ... Range hoods: Artificial logs: Snowmobiles: April 3, 2007 Season 9 (2008) Series Ep. ... Ductless air conditioners:
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 ...
The cross-flow or tangential fan, sometimes known as a tubular fan, was patented in 1893 by Paul Mortier, [17] [18] and is used extensively in heating, ventilation, and air conditioning (HVAC), especially in ductless split air conditioners. The fan is usually long relative to its diameter, so the flow remains approximately two-dimensional away ...
Round duct is made using a continuous spiral forming machine which can make round duct in nearly any diameter when using the right forming die and to any length to suit, but the most common stock sizes range evenly from 4" to 24" (10-60 cm) with 6"-12" (15-30 cm) being most commonly used. Stock pipe is usually sold in 10' (300 cm) joints.