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New heat pump models

Since 2025, new heat pumps are made with R-454B or R-32 refrigerant instead of R-410A, which is being phased down. Here is that switch, and the newest certified models of the size class you pick.

Covers heat pumps sold new today (R-454B and R-32 refrigerant). See older R-410A models · Updated

The refrigerant switchIn the newest certifications, R-410A is down to 0%. The oldest certifications still listed were almost all R-410A.

Each bar: 500,000 AHRI certifications in a row. AHRI numbers rise over time, so they stand in for dates, which AHRI does not publish. Source: AHRI directory.

What the switch means

R-454B and R-32 warm the planet far less than R-410A if they leak. Heat pumps already installed with R-410A can still be serviced; the phase-down limits how much new R-410A is made. The two kinds use different parts, so they are listed separately here.

Newest models: ducted, up to 1.5 tons

By AHRI reference number, newest first.

Showing Ducted, Up to 1.5 tons (under 21,000 Btu/h cooling). What size is my system?

  1. 1ML16KP2-024-230A**with ducted air handler V2430B-*EC*E**1Lennox1.5 tons · 20,600 Btu/h · DuctedGood1.72
  2. 2D5CURAH18AAKwith ducted air handler (H,G)73A*24+TXV+TDCarrier (sold as Day & Night)1.5 tons · 18,000 Btu/h · DuctedTop 10%1.78
  3. 3D5CUHAH18AAKwith ducted air handler (H,G)73A*24+TXV+TDCarrier (sold as Day & Night)1.5 tons · 18,000 Btu/h · DuctedTop 10%2.04
  4. 437MUHAQ18AA3with ducted air handler (H,P)G21*24+TXV+TDCarrier (sold as Bryant)1.5 tons · 17,600 Btu/h · DuctedTop 10%1.94

These are certified test ratings, not a recommendation for your home. The right size comes from a load calculation by a contractor.

Next steps

The advanced view shows every reference band of the switch and the full list of newest certifications.

Open the advanced view