Different results in Ideal Loads if I calculate the ventilation + infiltration load all together at the zone level than if I calculate the infiltration at the zone level and the ventilation at the system level.
Different results in Ideal Loads if I calculate the ventilation + infiltration load all together at the zone level than if I calculate the infiltration at the zone level and the ventilation at the system level. What is this about? Makes sense?
Ventilation + infiltration load all together.
End Use Consumption (kWh)
Heating 2,139
Cooling 306
Infiltration at the zone level and the ventilation at the system level.
End Use Consumption (kWh)
Heating 1,739
Cooling 319
If you want, I can send you the two OSM files so you can check it yourself. We are talking about 23% more energy simply by introducing all the outside air as infiltrations. Such a difference seems strange to me.
CASE 1
SpaceInfiltrationdesignflowrate 1.26 ACH
CASE 2
SpaceInfiltrationdesignflowrate 0.26 ACH
DesignSpecificationOutdoorAir 1.00 ACH