Recover high-GWP refrigerants, favor low-GWP refrigerants to limit climate damage

Honeywell HFO-1234yf refrigerant

Image: Refrigerant Depot

By Will Driscoll

To limit climate damage from refrigerants with a high global warming potential:

  • States may require leak testing and leak repair of equipment using refrigerants, as California now requires for large equipment (see section 5 below).
  • States may also have authority to require that when equipment using refrigerant will no longer be used, that its refrigerant be recovered and either destroyed or reclaimed (recycled). A financial incentive or a refundable deposit could boost voluntary compliance.
  • Environmental groups may encourage people to choose equipment with low-GWP (global warming potential) refrigerants, such as R-1234, which has a GWP of 4 to 6 (see table below). This equipment includes vehicles, heat pumps, air conditioners, refrigerators, freezers, and dehumidifiers.

The following sections first describe various refrigerants, and then review refrigerant management policy at the global, U.S., and E.U. levels, and in California.

  1. Selected Refrigerants: Phased Out, In Use, and Under Consideration
RefrigerantGlobal Warming Potential (GWP)*,**Status
CFCsPhased out under the Montreal Protocol
HCFCsBeing phased out
HFCsWidely used
HFC: R5073300US: Were to be phased out via EPA’s 2015 and 2016 rules.*** A three-judge panel of the U.S. Court of Appeals for the District of Columbia Circuit struck down the 2015 rule.  That ruling has been appealed to the full en banc panel of the same appeals court.
HFC: R404A3260
HFC: R410A1725US: Was to be partially phased out via EPA’s 2015 and 2016 rules;*** see above.
HFC: R4071525
HFC: (R)134a1430US: Was to be phased out in light-duty vehicles via EPA’s 2015 rule, which is now in the courts—see above.
HFC: 152a (R152a)  124
HFO 1234 (R-1234)      4Now used in some vehicle air conditioners
“Natural refrigerants”: CO2 (R744) and ammonia (NH3)CO2: 1Daimler and Volkswagen are evaluating CO2 for vehicle air conditioners.****

Note: The “R” refrigerants are a blend of two different HFC compounds, except for R744 (CO2).





  1. Global Policy

The Montreal Protocol’s Kigali Amendment of 2016, which requires a global phasedown of HFCs, will enter into force on January 1, 2019:  “Under the amendment, developed countries will reduce HFC consumption beginning in 2019”:  The amendment apparently does not address HFC recovery and destruction:

  1. U.S. Policy

EPA issued two HFC phase-out regulations in 2015 and 2016.****  The “Final Rule Revising the Section 608 Refrigerant Management Regulations” made “changes to the existing requirements under Section 608 [including] … 1) Extends the requirements of the Refrigerant Management Program to cover substitute refrigerants, such as HFCs”:

A three-judge panel of the U.S. Court of Appeals for the District of Columbia Circuit ruled on August 8, 2017 that the U.S. EPA does not have authority under Clean Air Act Section 612 to regulate HFCs.  Refrigerant manufacturers and the NRDC have appealed for a rehearing of the case by a panel of all the appeals court judges of the DC Circuit (an “en banc” panel).

Prior EPA regulations require recovery of ozone-depleting refrigerants when existing equipment is removed, with the refrigerants sent out for destruction or reclamation (recycling):

The amounts recovered each year from 2000-2016 are shown here:

EPA-certified refrigerant reclaimers are shown on this list:

  1. E.U. Policy

The E.U. adopted a regulation in 2014 to phase out HFCs, and encourage refrigerant recovery and destruction at the end of a unit’s service life. (EU regulation 517/2014).  “Member States shall encourage the development of producer responsibility schemes for the recovery of fluorinated greenhouse gases and their recycling, reclamation or destruction.”

  1. California Policy

The California Air Resources Board (CARB) Refrigerant Management Program requires commercial and industrial facilities with a refrigeration system using more than 50 pounds of a high-GWP refrigerant (including HFCs) to register with CARB, to test for leaks, and if a leak is detected, to repair, retrofit or retire the equipment.  The program apparently does not address refrigerant recovery and destruction.





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