York YZT48B21vsZERO ZSOVA-48HDMB-US
Side-by-side heat pump comparison
York YZT48B21
SEER2
16–17BTU/Wh
HSPF2
8.1BTU/Wh
Cooling Capacity
45500–47500BTU/hr
Refrigerant
R-410A
GWP 2088 · Higher
ZERO ZSOVA-48HDMB-US
SEER2
16BTU/Wh
HSPF2
8.5BTU/Wh
Cooling Capacity
48000BTU/hr
Cold Climate
Yes
Cold climate certified
Key differences
York YZT48B21 is 6% more efficient at 17.0 BTU/Wh versus 16.0 BTU/Wh for the ZERO ZSOVA-48HDMB-US. The ZERO ZSOVA-48HDMB-US is larger at 48000 BTU/hr versus 47500 BTU/hr. ZERO ZSOVA-48HDMB-US uses a lower-impact refrigerant: R-454B (GWP 470) versus R-410A (GWP 2088). Overall, the York YZT48B21 sits higher in the category, ranking above 85% of certified air-source heat pumps.
Efficiency
| Spec | York | ZERO |
|---|---|---|
| SEER2 (best combination)(BTU/Wh) | 17 | 16 |
| SEER2 (worst combination)(BTU/Wh) | 16 | 16 |
| HSPF2 (best combination)(BTU/Wh) | 8.1 | 8.5 |
| HSPF2 (worst combination)(BTU/Wh) | 8.1 | 8.5 |
| EER2 (best combination)(BTU/Wh) | 12.5 | 10 |
| COP at 5 °F | 2.32 | 1.85 |
Capacity
| Spec | York | ZERO |
|---|---|---|
| Cooling Capacity (max)(BTU/hr) | 47500 | 48000 |
| Cooling Capacity (min)(BTU/hr) | 45500 | 48000 |
| Heating at 47 °F(BTU/hr) | 48000 | 48000 |
| Heating at 17 °F(BTU/hr) | 33000 | 34800 |
| Heating at 5 °F(BTU/hr) | 27000 | 38000 |
Configuration
| Spec | York | 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 | AFFINITY | ZAVA Series |
| Indoor-Unit Combinations Rated | 18 | 1 |
Refrigerant
| Spec | York | ZERO |
|---|---|---|
| Type | R-410A | R-454B |
| GWP Rating | R-410A (GWP:2088) | R-454B (GWP:470 | Lower GWP) |