: It is illegal and unsafe for a homeowner to attempt to refill their own R22 system.

: Some systems can be modified by a professional to use "drop-in" replacements like R407C or MO99 . This usually requires changing seals or oil and may reduce the system's cooling capacity.

: Most R22 units are now over 15 years old. Upgrading to a modern system—now transitioning to newer eco-friendly refrigerants like R454B —is often the most cost-effective long-term move due to better energy efficiency and lower repair costs.

: You cannot simply put a newer refrigerant like R410A into an R22 system; the different pressures will likely cause immediate and severe equipment damage. Your Options in 2026

While it is still legal to operate an air conditioner that uses R22, the production and import of new R22 was completely banned in the U.S. on January 1, 2020. Any R22 used today must come from existing stockpiles or be "reclaimed" (recovered and recycled) from older units. Key Facts for Homeowners