Grandaire W4H7T24*K*AAA*vsZERO ZSOVA-24HDMB-USHH
Side-by-side heat pump comparison
Grandaire W4H7T24*K*AAA*
SEER2
16.5BTU/Wh
HSPF2
8.1BTU/Wh
Cooling Capacity
23200BTU/hr
Refrigerant
R-410A
GWP 2088 · Higher
ZERO ZSOVA-24HDMB-USHH
SEER2
18.3BTU/Wh
HSPF2
10BTU/Wh
Cooling Capacity
23000BTU/hr
Cold Climate
Yes
Cold climate certified
Key differences
ZERO ZSOVA-24HDMB-USHH is 10% more efficient at 18.3 BTU/Wh versus 16.5 BTU/Wh for the Grandaire W4H7T24*K*AAA*. The Grandaire W4H7T24*K*AAA* is larger at 23200 BTU/hr versus 23000 BTU/hr. ZERO ZSOVA-24HDMB-USHH uses a lower-impact refrigerant: R-454B (GWP 470) versus R-410A (GWP 2088).
Efficiency
| Spec | Grandaire | ZERO |
|---|---|---|
| SEER2 (best combination)(BTU/Wh) | 16.5 | 18.3 |
| SEER2 (worst combination)(BTU/Wh) | 16.5 | 18.3 |
| HSPF2 (best combination)(BTU/Wh) | 8.1 | 10 |
| HSPF2 (worst combination)(BTU/Wh) | 8.1 | 10 |
| EER2 (best combination)(BTU/Wh) | 12.5 | 11.7 |
| COP at 5 °F | — | 1.87 |
Capacity
| Spec | Grandaire | ZERO |
|---|---|---|
| Cooling Capacity (max)(BTU/hr) | 23200 | 23000 |
| Cooling Capacity (min)(BTU/hr) | 23200 | 23000 |
| Heating at 47 °F(BTU/hr) | 23400 | 24000 |
| Heating at 17 °F(BTU/hr) | 14700 | 20800 |
| Heating at 5 °F(BTU/hr) | — | 21600 |
Configuration
| Spec | Grandaire | ZERO |
|---|---|---|
| Product Type | HP - Split System | HP - Split System |
| Compressor Staging | Two-stage | Continuously variable |
| Cold Climate Certified | No | Yes |
| Connected Capability | No | No |
| Series | 2-STAGE 17 SEER HP | ZAVA Series |
| Indoor-Unit Combinations Rated | 1 | 1 |
Refrigerant
| Spec | Grandaire | ZERO |
|---|---|---|
| Type | R-410A | R-454B |
| GWP Rating | R-410A (GWP:2088) | R-454B (GWP:470 | Lower GWP) |