@edpmay and @MaxMarschall ,
That’s a good suggestion and I just implemented it:
I was originally thinking that it was only hospitals and labs that needed to make use of the ACH property but, with the passive house use case, I think there’s enough to justify adding it. I also added the absolute flow_per_zone property (in m3/s) on the “HB Apply Absolute Loads” component and I implemented it in a manner that overrides all of the other ventilation inputs (vent_per_floor, vent_per_person, vent_ach).
Along these lines, you are correct, @edpmay , that Honeybee just adds the four types of ventilation together unless you are explicitly overwriting them with the “HB Apply Absolute Loads” component. The EnergyPlus implementation of this is more confusing with a ton of conditionals but I tried to keep it simple in Honeybee.