Gibson / AIR-SOURCE HEAT PUMP
FSH4BF5M2SX48K
GIBSON FSH4BF SERIES · EPA record 4045657
Source checked Sep 21, 2026
Performance & equipment details
Values below belong to EPA record 4045657. 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 | 16.00 |
| EER2 · BTU/Wh | 11.70 |
| HSPF2 · BTU/Wh | 8.00 |
| Cooling capacity · BTU/h | 45500 |
| Heating capacity at 47°F / 8.3°C · BTU/h | 46000 |
| Heating capacity at 17°F / −8.3°C · BTU/h | 28000 |
| Heating capacity at 5°F / −15°C · BTU/h | 23400 |
| COP at 5°F / −15°C | 1.75 |
| Equipment / loop type | HP - Split System |
| Refrigerant / source-reported GWP | R-454B (GWP:470 | Lower GWP) |
| Compressor staging | Two-stage |
| Connected capability | No |
This listed system
These ratings apply to the listed configuration. Changing a component may change performance.
Outdoor unit
+FSH4BF5M2SX48KIndoor unit
B65VMMX3648K*CAHRI reference 217447223 · reported by ENERGY STAR; no direct AHRI data connection.
All source records for FSH4BF5M2SX48K →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 | 4045657 | EPA Sep 21, 2026 |
| markets | United States, Canada | EPA Sep 21, 2026 |
| cop at 5 f | 1.75 | EPA Sep 21, 2026 |
| eer2 btu wh | 11.70 | EPA Sep 21, 2026 |
| series name | GIBSON FSH4BF SERIES | EPA Sep 21, 2026 |
| cold climate | No | EPA Sep 21, 2026 |
| hspf2 btu wh | 8.00 | EPA Sep 21, 2026 |
| model number | FSH4BF5M2SX48K | EPA Sep 21, 2026 |
| product type | HP - Split System | EPA Sep 21, 2026 |
| seer2 btu wh | 16.00 | EPA Sep 21, 2026 |
| date certified | 2025-05-15T00:00:00.000 | EPA Sep 21, 2026 |
| manufacturer type | System Manufacturer | EPA Sep 21, 2026 |
| compressor staging | Two-stage | EPA Sep 21, 2026 |
| energy star partner | Nortek Global HVAC | EPA Sep 21, 2026 |
| connected capability | No | EPA Sep 21, 2026 |
| refrigerant with gwp | R-454B (GWP:470 | Lower GWP) | EPA Sep 21, 2026 |
| ahri reference number | 217447223 | EPA Sep 21, 2026 |
| cooling capacity btu h | 45500 | EPA Sep 21, 2026 |
| outdoor unit brand name | Gibson | EPA Sep 21, 2026 |
| date available on market | 2024-12-19T00:00:00.000 | EPA Sep 21, 2026 |
| indoor unit model number | B65VMMX3648K*C | EPA Sep 21, 2026 |
| energy star model identifier | ES_1020907_FSH4BF5M2SX48K_05102025025004_28217447223 | EPA Sep 21, 2026 |
| heating capacity at 5 f btu h | 23400 | EPA Sep 21, 2026 |
| meets most efficient criteria | No | EPA Sep 21, 2026 |
| heating capacity at 17 f btu h | 28000 | EPA Sep 21, 2026 |
| heating capacity at 47 f btu h | 46000 | EPA Sep 21, 2026 |
| meets peak cooling requirements | Yes | EPA Sep 21, 2026 |
| controls verification procedure cvp test | None | EPA Sep 21, 2026 |