Westinghouse / AIR-SOURCE HEAT PUMP
WHM48SZA21S
WH ULTRA HD-COIL · EPA record 3028365
Source checked Sep 21, 2026
Performance & equipment details
Values below belong to EPA record 3028365. Temperature points and test metrics are preserved as reported. Missing and zero values are not substituted with estimates.
| Metric or attribute | Source value |
|---|---|
| SEER2 · BTU/Wh | 15.55 |
| EER2 · BTU/Wh | 11.40 |
| HSPF2 · BTU/Wh | 8.55 |
| Cooling capacity · BTU/h | 42000 |
| Heating capacity at 47°F / 8.3°C · BTU/h | 42000 |
| Heating capacity at 17°F / −8.3°C · BTU/h | 31200 |
| Heating capacity at 5°F / −15°C · BTU/h | 34600 |
| COP at 5°F / −15°C | 1.94 |
| Equipment / loop type | HP - Split System |
| Refrigerant / source-reported GWP | R-410A (GWP:2088) |
| Compressor staging | Continuously variable |
| Connected capability | No |
This listed system
These ratings apply to the listed configuration. Changing a component may change performance.
Outdoor unit
+WHM48SZA21SIndoor unit
DC61A44-245RAHRI reference 213886028 · reported by ENERGY STAR; no direct AHRI data connection.
All source records for WHM48SZA21S →Specifications & provenance
Every value below is preserved from the source record. Checked Sep 21, 2026. Asterisks and other model wildcards are retained as published.
| Source field | Reported value | Evidence |
|---|---|---|
| pd id | 3028365 | EPA Sep 21, 2026 |
| markets | United States | EPA Sep 21, 2026 |
| cop at 5 f | 1.94 | EPA Sep 21, 2026 |
| eer2 btu wh | 11.40 | EPA Sep 21, 2026 |
| series name | WH ULTRA HD-COIL | EPA Sep 21, 2026 |
| cold climate | Yes | EPA Sep 21, 2026 |
| hspf2 btu wh | 8.55 | EPA Sep 21, 2026 |
| model number | WHM48SZA21S | EPA Sep 21, 2026 |
| product type | HP - Split System | EPA Sep 21, 2026 |
| seer2 btu wh | 15.55 | EPA Sep 21, 2026 |
| date certified | 2024-10-24T00:00:00.000 | EPA Sep 21, 2026 |
| manufacturer type | System Manufacturer | EPA Sep 21, 2026 |
| compressor staging | Continuously variable | EPA Sep 21, 2026 |
| energy star partner | Fujitsu General America, Inc. | EPA Sep 21, 2026 |
| connected capability | No | EPA Sep 21, 2026 |
| refrigerant with gwp | R-410A (GWP:2088) | EPA Sep 21, 2026 |
| ahri reference number | 213886028 | EPA Sep 21, 2026 |
| cooling capacity btu h | 42000 | EPA Sep 21, 2026 |
| outdoor unit brand name | Westinghouse | EPA Sep 21, 2026 |
| date available on market | 2023-12-19T00:00:00.000 | EPA Sep 21, 2026 |
| indoor unit model number | DC61A44-245R | EPA Sep 21, 2026 |
| energy star model identifier | ES_28426_WHM48SZA21S_12182023213003_1016016 | EPA Sep 21, 2026 |
| heating capacity at 5 f btu h | 34600 | EPA Sep 21, 2026 |
| meets most efficient criteria | No | EPA Sep 21, 2026 |
| heating capacity at 17 f btu h | 31200 | EPA Sep 21, 2026 |
| heating capacity at 47 f btu h | 42000 | EPA Sep 21, 2026 |
| meets peak cooling requirements | No | EPA Sep 21, 2026 |