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NuTone became a publicly traded company in 1955. Other NuTone-created products included the residential kitchen ventilator hood and built-in kitchen countertop appliances. In 1967, when the Corbetts sold their interest in the company to the Scovill Manufacturing Company, [2] NuTone was the largest American producer of home electrical products.
The English architect Sir Christopher Wren applied an early ventilation system in the Houses of Parliament that used bellows to circulate air. Wren's design was the catalyst for much later improvement and innovation. The first rotary fan used in Europe was for mine ventilation during the 16th century, as illustrated by Georg Agricola (1494 ...
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.
A High-volume low-speed fan. A high-volume low-speed (HVLS) fan is a type of mechanical fan greater than 7 feet (2.1 m) in diameter. [1] HVLS fans are generally ceiling fans although some are pole mounted.
Before the development of electrical power the principle of cooling a building by designing it to draw in cooler air from below and vent it from the top was known. In the absence of the forced air movement produced by a fan, careful design to promote cooling air flow was required.
Figure 1: Components of a centrifugal fan An external motor belt driven inline centrifugal fan discharging inline to the exterior of a building through a duct. Unlike non-inline/non-concentric impeller casing design with a cutoff blade above, the concentrically symetric cylinder casing and impeller geometry of inline type redirects the outflow around so that it is parallel to the inflow of gases.
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