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The refrigeration and air conditioning industry had already discontinued production of new R-22 equipment. The practical effect of these rulings is to reduce the cost of imported R-22 to maintain aging equipment, extending its service life, while preventing the use of R-22 in new equipment.
In the late 1920s, a research team was formed by Charles Franklin Kettering in General Motors to find a replacement for the dangerous refrigerants then in use, such as ammonia. [3] The team was headed by Thomas Midgley Jr. [ 4 ] In 1928, they improved the synthesis of CFCs and demonstrated their usefulness for such a purpose and their stability ...
The table is sortable by each of the following refrigerant properties (scroll right or reduce magnification to view more properties): Type/prefix (see legends); ASHRAE number
However, in many industries, the "invoice cost" actually varies from the "net purchase cost," or the actual price of a product. The invoice cost of a product is the price that the merchant pays for the product before marking it up to sell. The invoice cost is sometimes used in industries such as automobile sales to entice customers to buy.
Air conditioning equipment will reduce the absolute humidity of the air processed by the system if the surface of the evaporator coil is significantly cooler than the dew point of the surrounding air. An air conditioner designed for an occupied space will typically achieve a 30% to 60% relative humidity in the occupied space. [51]
R22 (New York City Subway car) Chlorodifluoromethane, a refrigerant; Fiat R.22, an Italian reconnaissance aircraft; Ndonga dialect; R22: Harmful if swallowed, a risk phrase; R-22 Spearhead, a fictional starfighter in the Star Wars universe; Robinson R22, an American helicopter; R22 refrigerant
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