Tempstar D5CUHAH18AAKvsWEATHERMAKER PH5SAN518**AA*
Side-by-side heat pump comparison
Tempstar D5CUHAH18AAK
SEER2
15.2–19.3BTU/Wh
HSPF2
9–12.5BTU/Wh
Cooling Capacity
17700–18800BTU/hr
Cold Climate
Yes
Cold climate certified
WEATHERMAKER PH5SAN518**AA*
SEER2
15.2–15.5BTU/Wh
HSPF2
7.8–8BTU/Wh
Cooling Capacity
17400–18900BTU/hr
Refrigerant
R-454B
GWP 470 · Lower
Key differences
Tempstar D5CUHAH18AAK is 20% more efficient at 19.3 BTU/Wh versus 15.5 BTU/Wh for the WEATHERMAKER PH5SAN518**AA*. The WEATHERMAKER PH5SAN518**AA* is larger at 18900 BTU/hr versus 18800 BTU/hr. Overall, the Tempstar D5CUHAH18AAK sits higher in the category, ranking above 37% of certified air-source heat pumps.
Efficiency
| Spec | Tempstar | WEATHERMAKER |
|---|---|---|
| SEER2 (best combination)(BTU/Wh) | 19.3 | 15.5 |
| SEER2 (worst combination)(BTU/Wh) | 15.2 | 15.2 |
| HSPF2 (best combination)(BTU/Wh) | 12.5 | 8 |
| HSPF2 (worst combination)(BTU/Wh) | 9 | 7.8 |
| EER2 (best combination)(BTU/Wh) | 12.5 | 12.5 |
| COP at 5 °F | 2.12 | 2.10 |
Capacity
| Spec | Tempstar | WEATHERMAKER |
|---|---|---|
| Cooling Capacity (max)(BTU/hr) | 18800 | 18900 |
| Cooling Capacity (min)(BTU/hr) | 17700 | 17400 |
| Heating at 47 °F(BTU/hr) | 22600 | 18300 |
| Heating at 17 °F(BTU/hr) | 16100 | 11000 |
| Heating at 5 °F(BTU/hr) | 19600 | 8600 |
Configuration
| Spec | Tempstar | WEATHERMAKER |
|---|---|---|
| Product Type | HP - Split System | HP - Split System |
| Compressor Staging | Continuously variable | Single stage |
| Cold Climate Certified | Yes | No |
| Connected Capability | No | No |
| Series | D5F Series | 15 SEER2 HP |
| Indoor-Unit Combinations Rated | 38 | 38 |
Refrigerant
| Spec | Tempstar | WEATHERMAKER |
|---|---|---|
| Type | R-454B | R-454B |
| GWP Rating | R-454B (GWP:470 | Lower GWP) | R-454B (GWP:470 | Lower GWP) |