American Standard / AIR-SOURCE HEAT PUMP
4TXK3818A10NU**
38 Series · EPA record 4529666
Source checked Sep 21, 2026
Performance & equipment details
Values below belong to EPA record 4529666. 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 | 22.00 |
| EER2 · BTU/Wh | 13.50 |
| HSPF2 · BTU/Wh | 10.00 |
| Cooling capacity · BTU/h | 18000 |
| Heating capacity at 47°F / 8.3°C · BTU/h | 18000 |
| Heating capacity at 17°F / −8.3°C · BTU/h | 15100 |
| Heating capacity at 5°F / −15°C · BTU/h | 20000 |
| COP at 5°F / −15°C | 1.80 |
| 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
+4TXK3818A10NU**Indoor unit
4MXW3818A10NU**AHRI reference 9150126 · reported by ENERGY STAR; no direct AHRI data connection.
All source records for 4TXK3818A10NU** →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 | 4529666 | EPA Sep 21, 2026 |
| markets | United States, Canada | EPA Sep 21, 2026 |
| cop at 5 f | 1.80 | EPA Sep 21, 2026 |
| eer2 btu wh | 13.50 | EPA Sep 21, 2026 |
| series name | 38 Series | EPA Sep 21, 2026 |
| cold climate | Yes | EPA Sep 21, 2026 |
| hspf2 btu wh | 10.00 | EPA Sep 21, 2026 |
| model number | 4TXK3818A10NU** | EPA Sep 21, 2026 |
| product type | HP - Mini or Multi Split | EPA Sep 21, 2026 |
| seer2 btu wh | 22.00 | EPA Sep 21, 2026 |
| date certified | 2026-06-13T00:00:00.000 | EPA Sep 21, 2026 |
| manufacturer type | System Manufacturer | EPA Sep 21, 2026 |
| compressor staging | Continuously variable | EPA Sep 21, 2026 |
| energy star partner | Trane and American Standard Heating and Air Conditioning | 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 | 9150126 | EPA Sep 21, 2026 |
| cooling capacity btu h | 18000 | EPA Sep 21, 2026 |
| indoor unit brand name | AMERICAN STANDARD | EPA Sep 21, 2026 |
| outdoor unit brand name | American Standard | EPA Sep 21, 2026 |
| date available on market | 2026-01-30T00:00:00.000 | EPA Sep 21, 2026 |
| indoor unit model number | 4MXW3818A10NU** | EPA Sep 21, 2026 |
| energy star model identifier | ES_1075581_4TXK3818A10NU**_01302026013000_299150126 | EPA Sep 21, 2026 |
| heating capacity at 5 f btu h | 20000 | EPA Sep 21, 2026 |
| meets most efficient criteria | Yes | EPA Sep 21, 2026 |
| heating capacity at 17 f btu h | 15100 | EPA Sep 21, 2026 |
| heating capacity at 47 f btu h | 18000 | EPA Sep 21, 2026 |
| meets peak cooling requirements | No | EPA Sep 21, 2026 |
| controls verification procedure cvp test | ENERGY STAR CVP Test | EPA Sep 21, 2026 |