Regional Standards Product Reference Guide
LENNOX
Air is life. Make it perfect.
Introduction to 2023 Efficiency Standards
Effective January 1, 2023, new minimum efficiency standards are in effect for split-system air conditioners and split-system heat pumps. A revised efficiency rating test procedure, known as the "M1 Standard", also impacts these product types, as well as packaged units. These standards vary by product type and geographic region.
This guide outlines the changes to air conditioner and heat pump product lines resulting from the M1 Standard. Mini-splits, package units, and indoor equipment are not included in this guide because no changes were made to those product lines due to the 2023 regional standards.
Air Conditioners - South & Southwest
This section details the 2022 product line-up and the corresponding 2023 Regional Standard Compliant Products for air conditioners in the South & Southwest regions.
| Product Series | 2022 Product Line Up | 2023 Regional Standard Compliant Products¹ |
|---|---|---|
| Dave Lennox Signature Collection | XC21 (up to 21.0 SEER) | EL23XCV (up to 22.0 SEER²) SL28XCV (up to 26.6 SEER²) |
| SL28XCV (up to 28.0 SEER) | ||
| ELITE® SERIES | EL16XC1 (up to 17.9 SEER) | EL17XC1 (up to 16.2 SEER²) |
| EL18XCV (up to 18.0 SEER) | EL18XCV (up to 17.1 SEER²) EL23XCV (up to 22.0 SEER²) |
|
| XC20 (up to 22.0 SEER) | ||
| MERIT® SERIES | ML14XC1 (meets or exceeds 17.0 SEER) | ML17XC1 (meets or exceeds 16.2 SEER²) ML18XC2 (up to 17.1 SEER²) |
| 16ACX (up to 18.0 SEER) |
In the South/Southwest regions, all air conditioners installed in 2023 must meet 2023 regional standards.
Heat Pumps - All Regions
This section details the 2022 product line-up and the corresponding 2023 Regional Standard Compliant Products for heat pumps across all regions.
| Product Series | 2022 Product Line Up | 2023 Regional Standard Compliant Products¹ |
|---|---|---|
| Dave Lennox Signature Collection | XP21 (up to 19.2 SEER) | EL22XPV (up to 21.0 SEER²) SL25XPV (up to 22.8 SEER²) |
| SL25XPV (up to 24.0 SEER) | ||
| 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) EL22XPV (up to 21.0 SEER²) |
|
| XP20 (up to 20.0 SEER) | ||
| MERIT® SERIES | ML14XP1 (meets or exceeds 14.0 SEER) | ML17XP1 (meets or exceeds 16.2 SEER²) ML17XP1 (meets or exceeds 16.2 SEER²) |
| ML16XP1 (up to 17.0 SEER) | EL18XPV (up to 17.1 SEER²) | |
| 16HPX (up to 16.5 SEER) |
Heat Pumps manufactured in 2022 that are not compliant with 2023 Regional Standards may be installed in all regions in 2023.
Product Line Up Details
This section provides a detailed product line-up for 2023 compliant air conditioners and heat pumps, categorized by stage and region.
Product Categories by Stage
The following illustrates the product line-up across Single Stage, Two Stage, and Variable Capacity categories, along with their series and key features.
| Category | Product Models | Series/Features |
|---|---|---|
| Single Stage | EL17XC1 | ELITE® SERIES [ENERGY STAR Certified] |
| EL17XP1 | ELITE® SERIES [ENERGY STAR Certified] | |
| ML17XC1 | MERIT® SERIES [ENERGY STAR Certified] | |
| ML17XP1 | MERIT® SERIES [ENERGY STAR Certified] | |
| Two Stage | ML18XC2 | MERIT® SERIES |
| Variable Capacity | SL28XCV | Dave Lennox Signature Collection |
| SL25XPV | Dave Lennox Signature Collection | |
| EL18XCV | ELITE® SERIES | |
| EL18XPV | ELITE® SERIES | |
| EL23XCV | ELITE® SERIES | |
| EL22XPV | ELITE® SERIES |
Key
Minimum Efficiency Requirements
The following tables detail minimum efficiency requirements for different product classes in the Southwest and South regions.
Southwest Region
| Product Class | SEER2 | EER2 | HSPF2 |
|---|---|---|---|
| Air Conditioners (≤ 3.5 ton) | 14.3 | 11.7* | — |
| Air Conditioners (≥ 4 ton) | 13.8 | 11.2* | — |
| Heat Pumps | 14.3 | — | 7.5 |
| *9.8 EER2 if SEER2 ≥ 15.2 | |||
| Implementation Date | Install by 1/1/23 | ||
South Region
| Product Class | SEER2 | HSPF2 |
|---|---|---|
| Air Conditioners (≤ 3.5 ton) | 14.3 | — |
| Air Conditioners (≥ 4 ton) | 13.8 | — |
| Heat Pumps | 14.3 | 7.5 |
| Implementation Date | Install by 1/1/23 | |
Geographic Regions Map
A map indicates regional standards. Areas colored red represent the South & Southwest region, where specific air conditioner standards apply. Areas colored yellow represent the South region, with its own set of standards. Other regions are not detailed in this specific document excerpt but are subject to their own standards.
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".
- 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
This table compares efficiency metrics under the new testing standards.
| Metric | SEER | SEER2 | EER | EER2 | HSPF | HSPF2 |
|---|---|---|---|---|---|---|
| 16.0 | 15.2 | 13.0 | 12.5 | 10.0 | 8.5 | |
| 15.0 | 14.3 | 12.5 | 12.0 | 9.5 | 8.1 | |
| 14.0 | 13.4 | 12.2 | 11.7 | 9.0 | 7.7 | |
| 13.0 | 12.4 | 11.7 | 11.2 | 8.8 | 7.5 |
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.
