DID YOU KNOW THAT A/C UNITS THAT USE R22 COMMONLY KNOW AS FREON WILL NO LONGER BE AVAILABLE AFTER JANUARY 2020? If you have an A/C unit or heat pump unit manufactured prior to 2004, your unit uses freon. Freon will be extremely hard to acquire after 2020 or impossible. If it is available, the cost will be upwards of $200 per pound or higher. Units typically use 5-6 pounds. If you have an older unit using freon, you may want to start thinking about replacing it.