Freon is a gas at room temperature and becomes a liquid when compressed, for example in the compressor of an AC system. Freon R-22 is toxic to the ozone layer and is being phased out. The Freon brand also includes other safer types of refrigerant, some of which can be used in the same appliances that use R-22. Newer types of refrigerant are not only safer for the environment, but some are also more energy-efficient.
Some of the new types of refrigerant can be used in the same appliances that use R-22, which avoids the cost of replacing those appliances as this type of Freon is phased out.
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