THF2B42T21
Fraser-Johnston · HP - Split System
ENERGY STAR CertifiedAir-Source Heat Pumps →
SEER2
15.2–16BTU/Wh
HSPF2
7.8–8.1BTU/Wh
Cooling Capacity
39500–42000BTU/hr
Refrigerant
R-410A
GWP 2088 · Higher
Low SEER2GWP 2088 · high impact
Fraser-Johnston THF2B42T21: SEER2 16 BTU/Wh, lower than 85% of air-source heat pumps (category median 20 BTU/Wh).
Where this model sits
Cooling42000BTU/hr
6000median 2400060000
SEER216BTU/Wh
15.2median 2035.1
Lower than 85% of air-source heat pumps.
The Fraser-Johnston THF2B42T21 is a 42000 BTU/hr hp - split system using R-410A, a refrigerant with high global warming potential (GWP 2088). At 16 BTU/Wh it ranks in the bottom 14% of the 12,218 certified air-source heat pumps models. Among similar-sized air-source heat pumps (within 10% of its size), it is less efficient than the peer median of 16 BTU/Wh.
Specifications
| Efficiency | |
|---|---|
| SEER2 (best combination) | 16BTU/Wh |
| SEER2 (worst combination) | 15.2BTU/Wh |
| HSPF2 (best combination) | 8.1BTU/Wh |
| HSPF2 (worst combination) | 7.8BTU/Wh |
| EER2 (best combination) | 12BTU/Wh |
| COP at 5 °F | 2.42 |
| Capacity | |
| Cooling Capacity (max) | 42000BTU/hr |
| Cooling Capacity (min) | 39500BTU/hr |
| Heating at 47 °F | 41000BTU/hr |
| Heating at 17 °F | 26600BTU/hr |
| Heating at 5 °F | 22600BTU/hr |
All 25 specifications
| Configuration | |
|---|---|
| Product Type | HP - Split System |
| Compressor Staging | Two-stage |
| Cold Climate Certified | No |
| Connected Capability | No |
| Series | LX SERIES |
| Indoor-Unit Combinations Rated | 430 |
| Refrigerant | |
| Type | R-410A |
| GWP Rating | R-410A (GWP:2088) |
| Identifiers | |
| Model Number | THF2B42T21 |
| ENERGY STAR ID | ES_21045_THF2B42T21_11212024023029_4697502 |
| Partner | Johnson Controls, Inc. |
| Date Certified | 2026-07-17 |
| Available From | 2024-11-16 |
| Markets | United States, Canada |
Documentation
We link to manufacturer documentation at its original source rather than rehosting it, so you always get the current revision.