Is there a way to add an HVAC System to Revit's Building Data under Advanced Energy Settings? (Need to input an ERV) The project I am working on has an ERV as its HVAC system and I want to run an Energy Analysis. Nothing in the drop down is close to an ERV system. I was able to edit an xml file to create new construction U-Values for building components, so am curious if there is anything like this I can do for HVAC Systems. Or if there is anyway at all to add a custom system. Thanks!!!