American Standard 5A6H6018A1vsZERO Z4SOV-18HDMB-USHH
Side-by-side heat pump comparison
American Standard 5A6H6018A1
SEER2
15.2–16BTU/Wh
HSPF2
7.8–8.1BTU/Wh
Cooling Capacity
18000–19200BTU/hr
Refrigerant
R-454B
GWP 470 · Lower
ZERO Z4SOV-18HDMB-USHH
SEER2
20–21BTU/Wh
HSPF2
10BTU/Wh
Cooling Capacity
19000BTU/hr
Cold Climate
Yes
Cold climate certified
Key differences
ZERO Z4SOV-18HDMB-USHH is 24% more efficient at 21.0 BTU/Wh versus 16.0 BTU/Wh for the American Standard 5A6H6018A1. The American Standard 5A6H6018A1 is larger at 19200 BTU/hr versus 19000 BTU/hr. Overall, the ZERO Z4SOV-18HDMB-USHH sits higher in the category, ranking above 37% of certified air-source heat pumps.
Efficiency
| Spec | American Standard | ZERO |
|---|---|---|
| SEER2 (best combination)(BTU/Wh) | 16 | 21 |
| SEER2 (worst combination)(BTU/Wh) | 15.2 | 20 |
| HSPF2 (best combination)(BTU/Wh) | 8.1 | 10 |
| HSPF2 (worst combination)(BTU/Wh) | 7.8 | 10 |
| EER2 (best combination)(BTU/Wh) | 12 | 13 |
| COP at 5 °F | 2.10 | 2 |
Capacity
| Spec | American Standard | ZERO |
|---|---|---|
| Cooling Capacity (max)(BTU/hr) | 19200 | 19000 |
| Cooling Capacity (min)(BTU/hr) | 18000 | 19000 |
| Heating at 47 °F(BTU/hr) | 18600 | 20000 |
| Heating at 17 °F(BTU/hr) | 11900 | 20000 |
| Heating at 5 °F(BTU/hr) | 9000 | 18000 |
Configuration
| Spec | American Standard | ZERO |
|---|---|---|
| Product Type | HP - Split System | HP - Mini or Multi Split |
| Compressor Staging | Single stage | Continuously variable |
| Cold Climate Certified | No | Yes |
| Connected Capability | No | No |
| Series | Silver 16 | Z4S Series |
| Indoor-Unit Combinations Rated | 6 | 3 |
Refrigerant
| Spec | American Standard | ZERO |
|---|---|---|
| Type | R-454B | R-454B |
| GWP Rating | R-454B (GWP:470 | Lower GWP) | R-454B (GWP:470 | Lower GWP) |