This is openstudio template for infiltration Quarter on, i wonder why the infiltration rate is 1 during unoccupied hours ..Does that mean that it's more of an open space where 100% of the outside air is being infiltrated to the office? and the reason why the infiltration changes during occupied hour is mainly due to using HVAC system and changing the pressure and temperature. thanks
Yes, that is what the Measure is assuming. That when the system is on, the infiltration (Idesign in the ZoneInfiltration object) is reduced to 0.25 of the full value because it's assumed that when the system is on, the building is pressurized. When the system is off, it is assumed that infiltration can move freely into the building.
I will say that our research has shown that this isn't necessarily the case. We (the National Institute of Standards and Technology) have released a Measure called "Adding infiltration correlated for weather and building characteristics" which will take into account weather (wind and outside temperature), physical characteristics of the building, and system operation when calculating infiltration.
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please always tag the question with the software.
okay, sorry for forgetting to do that!