Hopefully I’m understanding you’re post correctly, but I would say the ventilation amounts are like that because the energy model in HB is typically built to follow some standard (i.e. ASHRAE Standard 90.1) defined when assigning various templates (i.e program types, constructions etc). How you use it depends on your building code, but usually the standard defines one type of baseline minimum you have to meet.
This of course is a prescriptive approach that limits the flexibility in optimizing the energy performance of the building, which sounds like what you are critiquing in the posts above. That’s why there’s also performance compliance paths, that give more flexibility in building design (like for example, assumptions behind ventilation loads) as long as you can demonstrate through simulation that it performs better than the baseline minimum built prescriptively.
So if you can prove through simulation that you don’t need mechanical ventilation because of your building’s natural ventilation, then you don’t need to follow that assumption.
I’m asking because in the currently used European EN 12831 only the highest amount is taken of these loads? Does this apply for the honeybee/EP+ context as well?
If I’m interpreting this question correctly, HB takes the sum of the different ventilation inputs to calculate the overall flow rate. If I recall correctly, this is what is defined by the ASHRAE 55 Thermal Comfort standard. But you can incorporate the European standard assumption easily.
Single family residential? Where is this located in honeybee?
I’m not sure if HB has a single family residential program type.