Effective January 1, 2023, new minimum efficiency standards for split-system air conditioners and split-system heat pumps are in effect. This includes a change to the efficiency rating test procedure, known as the "M1 Standard", which impacts split-system air conditioners, split-system heat pumps, and packaged units. These standards vary by product type and geographic region. This guide outlines the changes to Lennox air conditioner and heat pump product lines resulting from the 2023 regional standards. Mini-splits, package units, and indoor equipment are not included as no changes were made to these product lines due to the 2023 regional standards.
Air Conditioners - North & Canada
Comparison of 2022 Product Line Up and 2023 Regional Standard Compliant Products:
| 2022 Product Line Up | 2023 Regional Standard Compliant Products¹ |
|---|---|
| LENNOX signature COLLECTION | |
| XC21 (up to 21.0 SEER) | EL23XCV (up to 22.0 SEER²)² |
| SL28XCV (up to 26.6 SEER²)² | |
| ELITE SERIES | |
| XC13N (up to 16.0 SEER) | EL16XC1 (up to 16.2 SEER²) |
| EL17XC1 (up to 16.2 SEER²) | |
| EL18XCV (up to 18.0 SEER) | EL18XCV (up to 17.1 SEER²)² |
| XC20 (up to 22.0 SEER) | EL23XCV (up to 22.0 SEER²)² |
| MERIT SERIES | |
| 13ACXN (meets or exceeds 13.0 SEER) | ML14XC1 (meets or exceeds 13.4 SEER²) |
| ML17XC1 (meets or exceeds 13.4 SEER²) | |
| 16ACX (up to 18.0 SEER) | ML18XC2 (up to 17.1 SEER²) |
Air Conditioners manufactured in 2022 that are not compliant with 2023 Regional Standards may be installed in the North and Canadian regions in 2023.
Heat Pumps - All Regions
Comparison of 2022 Product Line Up and 2023 Regional Standard Compliant Products:
| 2022 Product Line Up | 2023 Regional Standard Compliant Products¹ |
|---|---|
| LENNOX signature COLLECTION | |
| XP21 (up to 19.2 SEER) | EL22XPV (up to 21.0 SEER²)² |
| SL25XPV (up to 22.8 SEER²)² | |
| ELITE SERIES | |
| EL16XP1 (up to 17.0 SEER) | EL17XP1 (up to 16.2 SEER²) |
| EL18XPV (up to 20.0 SEER) | EL18XPV (up to 17.1 SEER²)² |
| XP20 (up to 20.0 SEER) | EL22XPV (up to 21.0 SEER²)² |
| MERIT SERIES | |
| ML14XP1 (meets or exceeds 14.0 SEER) | ML17XP1 (meets or exceeds 16.2 SEER²) |
| ML17XP1 (meets or exceeds 16.2 SEER²) | |
| 16HPX (up to 16.5 SEER) | EL18XPV (up to 17.1 SEER²) |
Heat Pumps manufactured in 2022 that are not compliant with 2023 Regional Standards may be installed in all regions in 2023.
Testing to a Higher Standard
To comply with a new, more stringent testing protocol for reporting efficiency ratings, manufacturers are required to re-test equipment to the new efficiency rating test requirements known as the "M1 Standard". Manufacturers must also publish equipment efficiency ratings using the new efficiency metrics of SEER2, EER2, and HSPF2.
Compared to the current test procedure, the new test procedure increases the external static pressure from 0.1-0.3 ESP to 0.5 ESP to better reflect field conditions. For heat pumps, a more representative heating load line will also be implemented. Since the new testing requirements are more stringent, in 2023, there will be new metrics and nomenclature: SEER2, EER2, and HSPF2.
Efficiency Comparison
| Metric | 2022 Standard | 2023 Standard |
|---|---|---|
| SEER | 16.0 | 15.2 |
| SEER2 | 13.0 | 12.5 |
| EER | 15.0 | 14.3 |
| EER2 | 12.5 | 12.0 |
| HSPF | 10.0 | 9.5 |
| HSPF2 | 8.1 | 7.7 |
¹Products listed are currently available with the exclusion of the EL23XCV and EL22XPV which are tentatively set to be available February 2023.
²SEER2 is based on preliminary ratings and are subject to change.
Product Line Up
Effective January 1, 2023, new minimum efficiency standards for split-system air conditioners and split-system heat pumps are in effect. This includes a change to the efficiency rating test procedure, known as the "M1 Standard", which impacts split-system air conditioners, split-system heat pumps, and packaged units. These standards vary by product type and geographic region. Below is the product line up of 2023 compliant air conditioners and heat pumps as a result of the M1 Standard. Mini-splits, package units, and indoor equipment are not included in the product line up because no changes to those product lines were made due to the 2023 regional standards.
| Single Stage | Two Stage | Variable Capacity |
|---|---|---|
| EL16XC1 | EL18XCV | SL28XCV |
| EL17XC1 | EL18XPV | SL25XPV |
| EL17XP1 | ML18XC2 | EL23XCV |
| ML14XC1 | EL22XPV | |
| ML17XC1 | ||
| ML17XP1 |
Key:
- Air Conditioner
- Heat Pump
- Smart Communicating
- Cold Climate HP
Minimum Efficiency - North & Canada
| Product Class | SEER2 | HSPF2 |
|---|---|---|
| Air Conditioners (≤ 3.5 ton) | 13.4 | -- |
| Air Conditioners (≥ 4 ton) | 13.4 | -- |
| Heat Pumps | 14.3 | 7.5 |
Implementation Date: Manufacture by 12/31/22
Lennox Industries Inc. 22LNXTL 11/22
