Airquest PHB536000K000B*vsLennox XP21-036-230-**
Side-by-side heat pump comparison
Airquest PHB536000K000B*
SEER2
15.2BTU/Wh
HSPF2
7.2BTU/Wh
Cooling Capacity
35200BTU/hr
Refrigerant
R-454B
GWP 470 · Lower
Lennox XP21-036-230-**
SEER2
16–16.4BTU/Wh
HSPF2
8BTU/Wh
Cooling Capacity
34800–35000BTU/hr
Refrigerant
R-410A
GWP 2088 · Higher
Key differences
Lennox XP21-036-230-** is 7% more efficient at 16.4 BTU/Wh versus 15.2 BTU/Wh for the Airquest PHB536000K000B*. The Airquest PHB536000K000B* is larger at 35200 BTU/hr versus 35000 BTU/hr. Airquest PHB536000K000B* uses a lower-impact refrigerant: R-454B (GWP 470) versus R-410A (GWP 2088). Overall, the Lennox XP21-036-230-** sits higher in the category, ranking above 68% of certified air-source heat pumps.
Efficiency
| Spec | Airquest | Lennox |
|---|---|---|
| SEER2 (best combination)(BTU/Wh) | 15.2 | 16.4 |
| SEER2 (worst combination)(BTU/Wh) | 15.2 | 16 |
| HSPF2 (best combination)(BTU/Wh) | 7.2 | 8 |
| HSPF2 (worst combination)(BTU/Wh) | 7.2 | 8 |
| EER2 (best combination)(BTU/Wh) | 11.5 | 12.5 |
| COP at 5 °F | 1.70 | — |
Capacity
| Spec | Airquest | Lennox |
|---|---|---|
| Cooling Capacity (max)(BTU/hr) | 35200 | 35000 |
| Cooling Capacity (min)(BTU/hr) | 35200 | 34800 |
| Heating at 47 °F(BTU/hr) | 34400 | 34200 |
| Heating at 17 °F(BTU/hr) | 19600 | 23400 |
| Heating at 5 °F(BTU/hr) | 14100 | — |
Configuration
| Spec | Airquest | Lennox |
|---|---|---|
| Product Type | HP - Single Package | HP - Split System |
| Compressor Staging | Two-stage | Two-stage |
| Cold Climate Certified | No | No |
| Connected Capability | No | No |
| Series | Quiet Comfort HP | DAVE LENNOX SIGNATURE XP21 SERIES |
| Indoor-Unit Combinations Rated | 1 | 2 |
Refrigerant
| Spec | Airquest | Lennox |
|---|---|---|
| Type | R-454B | R-410A |
| GWP Rating | R-454B (GWP:470 | Lower GWP) | R-410A (GWP:2088) |