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R-410A is a refrigerant fluid used in air conditioning and heat pump applications. It is a zeotropic but near-azeotropic mixture of difluoromethane (CH 2 F 2, called R-32) and pentafluoroethane (CHF 2 CF 3, called R-125). R-410A is sold under the trademarked names AZ-20, EcoFluor R410, Forane 410A, Genetron R410A, Puron, and Suva 410A.
Commonly used in automotive air conditioners prior to phase out which began in 2012. R-410A: 50% R-32 / 50% R-125 (pentafluoroethane) Between 2430 (R-32) and 6350 (R-125) > 677: Widely Used: Most used in split heat pumps / AC by 2018. Almost 100% share in the USA. [58] Being phased out in the US starting in 2022. [68] [69]
As a result of CFCs contributing to ozone depletion in the upper atmosphere, the manufacture of such compounds has been phased out under the Montreal Protocol, and they are being replaced with other products such as hydrofluorocarbons (HFCs) and hydrofluoroolefins (HFOs) [1] including R-410A, R-134a and R-1234yf. [2] [3] [4]
Replacements such as R-32 and R-410A are being promoted as environmentally friendly but still have a high GWP. [88] A heat pump typically uses 3 kg of refrigerant. With R-32 this amount still has a 20-year impact equivalent to 7 tons of CO 2 , which corresponds to two years of natural gas heating in an average household.
Because of its reduced global warming potential (GWP), R-454B is intended to be an alternative to refrigerant R-410A in new equipment. [2] [3] [4] R-454B has a GWP of 466, which is 78 percent lower than R-410A's GWP of 2088. [2] R-454B is non-toxic and mildly flammable, with an ASHRAE safety classification of A2L. In the United States, it is ...
Given that this award wasn't given out until April 1904 and Crayola had been selling since August 1903, it is a misconception that the famous box shown on the postage stamp and in numerous other historical articles and web pages is "the" actual first design of their Crayola boxes because the box shown in all of those pictures has that Gold ...
Snow Crop was a household name for years, but in 1954, Minute Maid bought them out, and the brand slowly faded into the background. It stuck around for a few decades, but it quietly disappeared by ...
The Verge was similarly positive, giving both the 3a and the 3a XL an 8/10, stating that "[it] takes photos that are nearly indistinguishable from what you get out of a Pixel 3". [13] The battery life and build quality were praised as well, while reviewers were critical of the slower processor and lack of wireless charging and water resistance.