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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]
Central, "all-air" air-conditioning systems (or package systems) with a combined outdoor condenser/evaporator unit are often installed in North American residences, offices, and public buildings, but are difficult to retrofit (install in a building that was not designed to receive it) because of the bulky air ducts required. [28] (Minisplit ...
Air conditioning can be achieved using a mechanical 'air conditioner' or by other methods, including passive cooling and ventilative cooling. [ 2][ 3] Air conditioning is a member of a family of systems and techniques that provide heating, ventilation, and air conditioning (HVAC). [ 4] Heat pumps are similar in many ways to air conditioners ...
American Motors Corporation (AMC) made air conditioning standard equipment on all AMC Ambassadors starting with the 1968 model year, an innovation in the mass market with the base prices of the cars starting at $2,671. [27] [28] At the time, air conditioning was standard only on Cadillac limousines and Rolls-Royces. [29]
Willis Haviland Carrier (November 26, 1876 – October 7, 1950) was an American engineer, best known for inventing modern air conditioning. Carrier invented the first electrical air conditioning unit in 1902. In 1915, he founded Carrier Corporation, a company specializing in the manufacture and distribution of heating, ventilation, and air ...
The price of a first-class stamp reached 10 cents in 1974, just before the 200th anniversary of the service. As recently as 2002 it stood at 34 cents, or half of today’s price ahead of Sunday ...
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