SESKStuff Everyone Should Know
SESK: Stuff Everyone Should Know · sesk.info/epa-r22-is-hcfc

Which chemical family is R-22 refrigerant in?

R-22 is an HCFC.

Start playing free

  1. CFC
  2. HCFC ✔
  3. HFC

Why: EPA's test topics say R-12 is a CFC, R-22 is an HCFC and R-134 is an HFC. CFCs and HCFCs contain chlorine, so they can deplete ozone. HFCs do not.

Huh, didn't know that: HCFC-22 was widely used in unitary air conditioners, cold storage, retail food refrigeration and chillers.

The dad joke
Why did the HVAC tech have licenses in different states? He heard that Freon changes states.
Like this card?
Play the game

References

Answer: HCFC. EPA's test topics say R-12 is a CFC, R-22 is an HCFC and R-134 is an HFC. CFCs and HCFCs contain chlorine, so they can deplete ozone. HFCs do not.

  1. Section 608 Technician Certification Test Topics, US EPA www.epa.gov/section608/section-608-technician-certification-test-topics
    R-12 is a CFC, R-22 is an HCFC, R-134 is an HFC
    Checked 2026-10-10.
  2. Phaseout of Class II Ozone-Depleting Substances, US EPA www.epa.gov/ods-phaseout/phaseout-class-ii-ozone-depleting-substances
    used as a refrigerant in several applications such as unitary air conditioners
    Checked 2026-10-10.

Think this answer is wrong? Tap "Challenge this answer" on the card in the game and tell us why.

Test yourself in the game

Trades & ShopSince which year has the US banned new production and import of R-22?Trades & ShopWhich refrigerant does EPA list as an example of a high-pressure refrigerant?Trades & ShopIn EPA's leak repair rules, a leak rate is expressed as a percentage of full charge lost over what period?

That's stuff everyone should know.