In a project that we propose to use EnergyPlus to model VRF systems, our reviewer ask us to validate the EnergyPlus modeling tool against DOE 2.2. We would like to ask your opinions regarding whether EnergyPlus need to be validated against DOE 2.2? We believe we should use ASHRAE 140 as the standard to validate the modeling tools and we also believe EnergyPlus should be already validated by the standard and field studies.