EPA’s Revised AIM Act Rule: What It Means for R-410A Equipment

On May 21, 2026, the U.S. Environmental Protection Agency (EPA) finalized updates to the 2023 Technology Transitions Rule under the AIM Act. These revisions adjust compliance timelines for high-GWP refrigerants like R‑410A and provide added flexibility for existing equipment.

Here’s what you need to know to stay aligned and make informed decisions.

Installation Timeline Update

The revised rule removes the installation deadline for qualifying R‑410A residential and light commercial systems. To qualify:

• Equipment must be manufactured before January 1, 2025
• Systems may be serviced, repaired, and, where permitted, installed in line with EPA guidance

Effective date: July 27, 2026
Until this date, current EPA rules remain in effect. Installation of qualifying R‑410A systems is not permitted before July 27, 2026.

Equipment Categories and Requirements

The EPA defines R‑410A equipment across three categories. Each has specific timelines and conditions.

R‑410A Products

Factory-assembled and charged systems, including packaged units and MagicPak®.

• Manufacture Stop Date: December 31, 2024
• Distribution Stop Date: December 31, 2027

R‑410A Systems

Split systems assembled and charged in the field.

• Manufacture Stop Date: December 31, 2024
• Installation Stop Date: None

Requirements:

• Indoor and outdoor units must be manufactured before January 1, 2025
• Must be an AHRI-certified matched system

R‑410A Components

Individual units used for repair, such as condensing units, coils, and air handlers.

• Manufacture Stop Date: None (with conditions)
• Installation Stop Date: None (with conditions)

Key considerations:

• Outdoor units manufactured after January 1, 2025 must meet OUWNM efficiency standards
• Allied Air no longer manufactures these outdoor repair components
• Indoor components are not subject to these requirements
• Allied Air continues to produce R‑410A air handlers and coils

Replacement rule: You may replace one component at a time (indoor or outdoor). Replacing both is treated as a system and must meet system requirements.

What This Means For You

You can continue to support customers with existing R-410A systems while managing the transition to newer refrigerants.

You can:

• Service and repair installed R‑410A systems
• Use qualifying pre-2025 inventory for installation, where allowed
• Plan inventory and projects without immediate disruption

Allied Air Availability

Allied Air has qualifying R‑410A inventory available to support your replacement and service needs.

Inventory is available while supplies last.

• Reach out to your local Allied Air distributor to access qualifying R-410A inventory.

Conclusion

The EPA’s revised rule gives you more flexibility to manage R‑410A equipment without rushing decisions. With clear guidelines and extended flexibility, you can continue supporting customers while preparing for the shift to lower‑GWP solutions.

Review Allied Air’s available inventory and connect with your representative to identify compliant R‑410A options that meet your current installation and service requirements.