Question: how much freon is in a window air conditioner?
Answer: Window units prior to 2010 primarily use(d) R22 (also called HCFC-22) freon. R410A (also called Puron) is the standard as of 2015. A 5 ton AC unit has 10 to 20 pounds and a 3 ton AC unit has about 6 to 12 pounds of freon.