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Salamander heaters date back to at least 1915. In the early 1940s, W.L. Scheu of Scheu Manufacturing Company, a producer of temporary portable space heating equipment, developed the modern salamander heater to provide warmth to allow construction crews to work in inclement weather. Sales spread across the US, and by the 1950s, to Europe.
The efficiency of air conditioners is often rated by the seasonal energy efficiency ratio (SEER), which is defined by the Air Conditioning, Heating and Refrigeration Institute in its 2008 standard AHRI 210/240, Performance Rating of Unitary Air-Conditioning and Air-Source Heat Pump Equipment. [61]
Packaged terminal air conditioner installed in a residential apartment. A packaged terminal air conditioner (PTAC) is a type of self-contained heating and air conditioning system intended to be mounted through a wall. [1] The first practical semi-portable air conditioning unit invented by engineers at Chrysler Motors. It entered the market in ...
Briggs & Stratton Vanguard V-twin engine in a portable generator. A small engine is the general term for a wide range of small-displacement, low-powered internal combustion engines used to power lawn mowers, generators, concrete mixers and many other machines that require independent power sources. [1]
DOAS air handling unit with heat recovery wheel and passive dehumidification. A dedicated outdoor air system (DOAS) is a type of heating, ventilation and air-conditioning system that consists of two parallel systems: a dedicated system for delivering outdoor air ventilation that handles both the latent and sensible loads of conditioning the ventilation air, and a parallel system to handle the ...
A Westinghouse Farm Engine from 1890 The Westinghouse Farm Engine was a small, vertical-boiler steam engine built by the Westinghouse Company that emerged in the late 19th century. In the transition from horses to machinery, small portable engines were hauled by horses from farm to farm to give power where it was needed.