Question-and-Answer Resource for the Building Energy Modeling Community
 | 1 | initial version |
VRF does not have options to control humidity. For this reason a DOAS system should control to maintain a low dew point supply air temperature to dehumidify the outdoor air and also offset any latent loads within the building (i.e., DOAS supply air humidity ratio should be lower than the zone humidity ratio). Lower the DOAS supply air temperature, assuming there is a cooling coil in the DOAS, to see how that control point affects indoor relative humidity. Other system types do have humidity control options and may better serve your buildings humidity loads without overcooling the outdoor air (e.g., UnitarySystem, or other packaged system type, that has humidity control options).
