GRC18CN23STG1
Guardian · HP - Mini or Multi Split
19BTU/Wh
9BTU/Wh
18000BTU/hr
Yes
Guardian GRC18CN23STG1: SEER2 19 BTU/Wh, around the middle of the range for air-source heat pumps (category median 20 BTU/Wh).
SEER2: worse than 75% of the 1837 comparable models within 10% of this capacity. Their median is 21 BTU/Wh.
Where this model sits
The Guardian GRC18CN23STG1 is a 18000 BTU/hr hp - mini or multi split using R-32, a refrigerant with moderate global warming potential (GWP 675). At 19 BTU/Wh it ranks around the middle of the 12,218 certified air-source heat pumps models. Among similar-sized air-source heat pumps (within 10% of its size), it is less efficient than the peer median of 21 BTU/Wh. In this size range, comparable Midea models average 21.4 BTU/Wh and TOSOT models average 21 BTU/Wh.
Specifications
| Efficiency | |
|---|---|
| SEER2 (best combination) | 19BTU/Wh |
| SEER2 (worst combination) | 19BTU/Wh |
| HSPF2 (best combination) | 9BTU/Wh |
| HSPF2 (worst combination) | 9BTU/Wh |
| EER2 (best combination) | 11BTU/Wh |
| COP at 5 °F | 2.20 |
| Capacity | |
| Cooling Capacity (max) | 18000BTU/hr |
| Cooling Capacity (min) | 18000BTU/hr |
| Heating at 47 °F | 19100BTU/hr |
| Heating at 17 °F | 14000BTU/hr |
| Heating at 5 °F | 14200BTU/hr |
All 25 specifications
| Configuration | |
|---|---|
| Product Type | HP - Mini or Multi Split |
| Compressor Staging | Continuously variable |
| Cold Climate Certified | Yes |
| Connected Capability | No |
| Series | ECO |
| Indoor-Unit Combinations Rated | 1 |
| Refrigerant | |
| Type | R-32 |
| GWP Rating | R-32 (GWP:675 | Lower GWP) |
| Identifiers | |
| Model Number | GRC18CN23STG1 |
| ENERGY STAR ID | ES_16809_GRC18CN23STG1_03132026053000_29218139539 |
| Partner | Bosch Thermotechnology Corporation |
| Date Certified | 2026-04-27 |
| Available From | 2026-04-13 |
| Markets | United States, Canada |
Documentation
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