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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 1935, and was designed to fit under a window like many modern PTACs. [2]
In the later 1940s and 1950s, McQuay products and sales grew as the demand for commercial air conditioning increased. The U.S. manufacturing facilities were expanded to meet this demand. McQuay quickly became the world's largest supplier of heat transfer coils.
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]
A 29 kW (100,000 BTU/h) SEER 20 air conditioner would require less than 5 kW while operating. There are also new non-compressor-based electrical air conditioning systems with a SEER above 20 coming on the market.
The United States Centers For Disease Control and Prevention (CDC) performed indoor air quality testing for formaldehyde in some of the units. On February 14, 2008, the CDC published a preliminary report confirming that potentially hazardous levels of formaldehyde were found in many of the travel trailers and manufactured homes provided by FEMA ...
The Oldsmobile 88 (marketed from 1989 on as the Eighty Eight) is a full-size car that was sold and produced by Oldsmobile from 1949 until 1999. From 1950 until 1974, the 88 was the division's most profitable line, particularly the entry-level models such as the 88 and Dynamic 88.
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