Question-and-Answer Resource for the Building Energy Modeling Community
 | 1 | initial version |
I'm a design builder user and primary work on commercial projects, but also do some single family home residences. For context, most of my projects are in Vermont. Despite the climate, I show large cooling loads when the building envelope is very well insulated and tight. I show cooling dominant geothermal loads on most projects (added compressor and pump heat to the ground loop).
I'm not familiar with BeOPt and the ventilation requirement.
Here are some questions and comments for you to consider:
is there air conditioning?
is your model showing cooling dominant?
If so, you may be benefiting from infiltration when there are cooling loads and the outdoor conditions are mild (40F-60F)
do you have large south facing windows?
do you have skylights?
what is the window SHGC?
are you modeling window shading(interior or exterior)?
are you modeling natural ventilation for cooling?
