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What is the difference in R22 and 410A in air conditioning units?

What is the difference in R22 and 410A in air conditioning units? Why did this change? Both of these air conditioning rerefrigerants, R22 and 410A, are in common use throughout the world. R22 refrigerant is also known as Freon. In 2004, the Environmental Protection Agency began phasing out R22 air conditioning refrigerant. R22 will become…