Hi there, I have a question regarding VRF efficiencies. We have an office building that have VRF with heat pump systems that provide cooling and heating. ASHRAE 90.1-2010 has two tables that address VRF efficiencies: Table 6.8.1 I – Variable Refrigerant Air Conditioners and Table 6.8.1 J – Variable Refrigerant Air-to-Air and Applied Heat Pumps.

After analyzing both we realized that cooling efficiencies between these two tables varied. Is this because Table 6.8.1 I applies to only cooling VRF systems and Table 6.8.1 J applies to VRF systems that provide heating and cooling? Therefore, should we compare the VRF systems installed in our building with Table 6.8.1 J?

Thanks in advance!