The Quick Summary: What's Banned and When
The U.S. EPA, under the American Innovation and Manufacturing (AIM) Act, has mandated a phasedown of high global warming potential (GWP) refrigerants. The biggest impact for residential HVAC contractors is the effective ban on R-410A in new equipment manufactured after January 1, 2025.
HVAC manufacturers could no longer produce new equipment using R-410A after January 1, 2025. Equipment already in the supply chain could be sold through 2025, but the transition to lower-GWP alternatives is well underway. Servicing existing R-410A systems with reclaimed or stockpiled refrigerant is still permitted.
| Refrigerant | Type | Status | GWP |
|---|---|---|---|
| R-22 (Freon) | HCFC | Banned — production ended 2020 | 1,810 |
| R-410A | HFC blend | New equipment ban effective Jan 2025 | 2,088 |
| R-454B (Puron Advance) | HFO blend | Primary replacement for R-410A | 467 |
| R-32 | HFC | Allowed as A2L alternative | 675 |
| R-290 (Propane) | HC | Allowed in specific applications | 3 |
| R-744 (CO2) | Natural | Used in commercial applications | 1 |
What Are A2L Refrigerants — and Why Does It Matter?
The primary replacement for R-410A is R-454B (marketed as Puron Advance by Carrier and similar names by other manufacturers). R-454B is classified as an A2L refrigerant — meaning it is mildly flammable, unlike the non-flammable R-410A that contractors have used for decades.
This is a significant safety consideration. A2L refrigerants require updated equipment design (manufacturers have addressed this), but they also require updated contractor training and awareness around leak detection, ventilation, and service procedures.
ASHRAE safety classifications use letters and numbers. "A" means lower toxicity. "2L" means mildly flammable with a low burning velocity (less than 10 cm/s). While A2L refrigerants can ignite under specific conditions, the risk in properly installed and serviced residential systems is considered low. Training and awareness are key.
What This Means for HVAC Contractors Day-to-Day
New Equipment Requires New Refrigerant
Any new heat pump or air conditioner installed after 2025 will come pre-charged with a lower-GWP refrigerant — most commonly R-454B or R-32. You cannot recharge a new R-454B system with R-410A. The refrigerants are not interchangeable, and equipment is specifically designed for one or the other.
Existing R-410A Systems Can Still Be Serviced
If your customer already has a working R-410A system, you can still service it. R-410A recovered from existing systems can be reclaimed and reused for servicing. Production has stopped, but the refrigerant isn't illegal to use in systems that were designed for it — just increasingly expensive and harder to source.
Your Recovery Equipment Must Be Compatible
Different refrigerants require different recovery equipment. Verify that your recovery machines and gauges are rated for A2L refrigerants before working on new equipment. Manufacturers and distributors are updating their tools to accommodate the transition.
EPA 608 Certification Is Still Required
EPA Section 608 certification requirements remain in effect. You still need to be certified to purchase and handle refrigerants. The certification itself covers refrigerant handling broadly, but refreshing your knowledge on A2L handling procedures is strongly recommended.
How This Affects HERS / ECC Inspections in California
One area where the refrigerant transition directly intersects with HERS/ECC compliance is refrigerant charge verification. California Title 24 requires that new HVAC systems have their refrigerant charge verified by a HERS rater as part of the ECC inspection process.
This verification — which confirms the system has the correct amount of refrigerant for maximum efficiency — must now account for the new refrigerants in new equipment. HERS raters like Roo's Ratings stay up to date on the proper charge verification procedures for systems using R-454B, R-32, and other replacement refrigerants.
Switching to a new refrigerant doesn't eliminate your HERS inspection requirements — it just means the rater needs to verify refrigerant charge for the specific new refrigerant the system uses. Don't skip the HERS inspection just because you installed a new-generation system. California still requires it.
California-Specific Considerations
California has additional environmental regulations beyond federal EPA requirements. The California Air Resources Board (CARB) has been proactive about refrigerant regulations for years, and the state's goals around climate and HFC emissions are among the most aggressive in the country.
For contractors operating in California, staying on top of both federal EPA regulations and CARB guidance is essential. When in doubt, check with your refrigerant distributor and stay connected with your trade association.
Practical Steps for California HVAC Contractors
1. Train your technicians on A2L safety procedures. HVAC distributors and manufacturers are offering training sessions on the new refrigerants. Take advantage of these resources before your crews encounter A2L systems in the field.
2. Update your tools and recovery equipment. Verify that your manifold gauges, recovery machines, and leak detectors are compatible with A2L refrigerants.
3. Order new equipment early. Supply chain dynamics around the new refrigerant equipment are still stabilizing. Don't wait until a system fails to discover inventory issues.
4. Communicate with customers about service costs. R-410A is becoming more expensive as production winds down. Be transparent with existing R-410A customers about future servicing costs if their system develops a leak.
5. Keep your HERS inspections in order. New systems still require ECC/HERS inspection and refrigerant charge verification. Work with a reliable HERS rater to keep your jobs moving — delays in HERS inspections cost everyone time and money.
Roo's Ratings — CHEERS-Certified ECC/HERS Rater
Installing new HVAC equipment in Sacramento or the surrounding region? Roo's Ratings handles HERS refrigerant charge verification and all required ECC inspections — with same-day filing. Call (530) 300-4472 or request a quote online.