연락처 : HP 이메일 : kourtneygair@yahoo.com Hydrofluorocarbons would have raised world temperatures by around 0.3-0.5 °C (0.5-0.9 °F) by 2100 with out the Kigali Amendment. Refrigerants have additionally precipitated and continue to trigger serious environmental issues, including ozone depletion and local weather change, as several nations haven't yet ratified the Kigali Amendment to reduce the consumption and manufacturing of hydrofluorocarbons. Newer refrigerants which have reduced ozone depletion effects compared to CFCs have changed most CFC use.

Passive methods remained widespread until the 20th century after they fell out of fashion and have been changed by powered air conditioning. This follow was replaced by mechanical compression-cycle icemakers. In 1954, Ned Cole, a 1939 structure graduate from the University of Texas at Austin, developed the primary experimental "suburb" with inbuilt air conditioning in every house. 22 houses have been developed on a flat, treeless track in northwest Austin, Texas, and the neighborhood was christened the 'Austin Air-Conditioned Village.' The residents have been subjected to a 12 months-lengthy study of the results of air conditioning led by the nation's premier air conditioning firms, builders, Vapor Store Starter VAPE KITS (www.vaporchange.com) and social scientists.

In 2019, it was estimated that 90% of latest single-family houses constructed within the US included air conditioning, Vape Clearance starting from 99% in the South to 62% in the West. In response, the French authorities required all retirement homes to have at least one air-conditioned room at 25 °C (77 °F) per ground during heatwaves. A examine overlooking Chicago, Illinois, Detroit, and Michigan found that black households were half as prone to have central air conditioning units when in comparison with their white counterparts.

Natural cooling utilizes on-site energy, accessible from the natural environment, mixed with the architectural design of constructing elements (e.g. building envelope), somewhat than mechanical techniques to dissipate heat. In 1558, Vapor Starter Kits Giambattista della Porta described a method of chilling ice to temperatures far under its freezing level by mixing it with potassium nitrate (then known as "nitre") in his standard science e book Pure Magic. Air conditioning tools will scale back absolutely the humidity of the air processed by the system if the floor of the evaporator coil is significantly cooler than the dew level of the surrounding air.

In 1969, vape the first mini-split air conditioner was offered in the US. The 2nd-century Chinese language inventor Vapor Starter Kits Ding Huan of the Han dynasty invented a rotary fan for air conditioning, with seven wheels three m (10 ft) in diameter and manually powered by prisoners. Split-system central air conditioners include two heat exchangers, an outside unit (the condenser) from which heat is rejected to the atmosphere and an inner heat exchanger (the evaporator, or Fan Coil Unit, FCU) with the piped refrigerant being circulated between the 2.