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606.2.2.1 Ground Source Heat Pumps
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The efficiency of ground source heat pumps shall comply with the provisions of Table 606.2.2.1 based on the applicable referenced test procedure.
TABLE 606.2.2.1
ENERGY-EFFICIENCY CRITERIA FOR
GROUND SOURCE HEAT PUMPS
| PRODUCT TYPE | MINIMUM EER | MINIMUM COP | TEST PROCEDURE |
| Water-to-Air Closed loop | 14.1 | 3.3 | ISO 13256-1 |
| Water-to-Air Open loop | 16.2 | 3.6 | ISO 13256-1 |
| Water-to-Water Closed loop | 15.1 | 3.0 | ISO 13256-2 |
| Water-to-Water Open loop | 19.1 | 3.4 | ISO 13256-2 |
| Direct Expansion (DX) or Direct GeoExchange (DGX) | 15.0 | 3.5 | AHRI 870 |
EER = Energy efficiency ratio, COP = Coefficient of performance.
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