Panasonic CS-XZ18AKUAW/CU-XZ18AKUACvsWillis MZUHW18KCH21S2-O
Side-by-side heat pump comparison
Panasonic CS-XZ18AKUAW/CU-XZ18AKUAC
SEER2
22BTU/Wh
HSPF2
11.7BTU/Wh
Cooling Capacity
17200BTU/hr
Cold Climate
Yes
Cold climate certified
Willis MZUHW18KCH21S2-O
SEER2
21BTU/Wh
HSPF2
10BTU/Wh
Cooling Capacity
17000BTU/hr
Cold Climate
Yes
Cold climate certified
Key differences
Panasonic CS-XZ18AKUAW/CU-XZ18AKUAC is 5% more efficient at 22.0 BTU/Wh versus 21.0 BTU/Wh for the Willis MZUHW18KCH21S2-O. The Panasonic CS-XZ18AKUAW/CU-XZ18AKUAC is larger at 17200 BTU/hr versus 17000 BTU/hr. Panasonic CS-XZ18AKUAW/CU-XZ18AKUAC uses a lower-impact refrigerant: R-32 (GWP 675) versus R-410A (GWP 2088).
Efficiency
| Spec | Panasonic | Willis |
|---|---|---|
| SEER2 (best combination)(BTU/Wh) | 22 | 21 |
| SEER2 (worst combination)(BTU/Wh) | 22 | 21 |
| HSPF2 (best combination)(BTU/Wh) | 11.7 | 10 |
| HSPF2 (worst combination)(BTU/Wh) | 11.7 | 10 |
| EER2 (best combination)(BTU/Wh) | 13.7 | 12 |
| COP at 5 °F | 2.22 | 2.22 |
Capacity
| Spec | Panasonic | Willis |
|---|---|---|
| Cooling Capacity (max)(BTU/hr) | 17200 | 17000 |
| Cooling Capacity (min)(BTU/hr) | 17200 | 17000 |
| Heating at 47 °F(BTU/hr) | 20400 | 18000 |
| Heating at 17 °F(BTU/hr) | — | 15000 |
| Heating at 5 °F(BTU/hr) | 17800 | 13600 |
Configuration
| Spec | Panasonic | Willis |
|---|---|---|
| Product Type | HP - Mini or Multi Split | HP - Mini or Multi Split |
| Compressor Staging | Continuously variable | Continuously variable |
| Cold Climate Certified | Yes | Yes |
| Connected Capability | No | No |
| Series | ClimaPure XZ | MultiHeat |
| Indoor-Unit Combinations Rated | 1 | 1 |
Refrigerant
| Spec | Panasonic | Willis |
|---|---|---|
| Type | R-32 | R-410A |
| GWP Rating | R-32 (GWP:675 | Lower GWP) | R-410A (GWP:2088) |