American Standard / Mitsubishi Electric / AIR-SOURCE HEAT PUMP
MUZ-GS12NA***
M-Series · EPA record 2856486
Source checked Sep 21, 2026
Performance & equipment details
Values below belong to EPA record 2856486. 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 | 25.60 |
| EER2 · BTU/Wh | 13.05 |
| HSPF2 · BTU/Wh | 10.70 |
| Cooling capacity · BTU/h | 12000 |
| Heating capacity at 47°F / 8.3°C · BTU/h | 14400 |
| Heating capacity at 17°F / −8.3°C · BTU/h | 9000 |
| Heating capacity at 5°F / −15°C · BTU/h | 10100 |
| COP at 5°F / −15°C | 2.00 |
| Equipment / loop type | HP - Mini or Multi Split |
| 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
+MUZ-GS12NA***Indoor unit
NAXWST12B112**AHRI reference 207705487 · reported by ENERGY STAR; no direct AHRI data connection.
All source records for MUZ-GS12NA*** →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 | 2856486 | EPA Sep 21, 2026 |
| markets | United States | EPA Sep 21, 2026 |
| cop at 5 f | 2.00 | EPA Sep 21, 2026 |
| eer2 btu wh | 13.05 | EPA Sep 21, 2026 |
| series name | M-Series | EPA Sep 21, 2026 |
| cold climate | Yes | EPA Sep 21, 2026 |
| hspf2 btu wh | 10.70 | EPA Sep 21, 2026 |
| model number | MUZ-GS12NA*** | EPA Sep 21, 2026 |
| product type | HP - Mini or Multi Split | EPA Sep 21, 2026 |
| seer2 btu wh | 25.60 | EPA Sep 21, 2026 |
| date certified | 2025-03-13T00:00:00.000 | EPA Sep 21, 2026 |
| manufacturer type | System Manufacturer | EPA Sep 21, 2026 |
| compressor staging | Continuously variable | EPA Sep 21, 2026 |
| energy star partner | Mitsubishi Electric U.S. HVAC Division | 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 | 207705487 | EPA Sep 21, 2026 |
| cooling capacity btu h | 12000 | EPA Sep 21, 2026 |
| indoor unit brand name | American Standard / Mitsubishi Electric | EPA Sep 21, 2026 |
| outdoor unit brand name | American Standard / Mitsubishi Electric | EPA Sep 21, 2026 |
| date available on market | 2022-11-21T00:00:00.000 | EPA Sep 21, 2026 |
| indoor unit model number | NAXWST12B112** | EPA Sep 21, 2026 |
| energy star model identifier | ES_14817_MUZ-GS12NA***_12082023150042_3479808 | EPA Sep 21, 2026 |
| heating capacity at 5 f btu h | 10100 | EPA Sep 21, 2026 |
| meets most efficient criteria | Yes | EPA Sep 21, 2026 |
| heating capacity at 17 f btu h | 9000 | EPA Sep 21, 2026 |
| heating capacity at 47 f btu h | 14400 | EPA Sep 21, 2026 |
| meets peak cooling requirements | Yes | EPA Sep 21, 2026 |
| controls verification procedure cvp test | ENERGY STAR CVP Test | EPA Sep 21, 2026 |