[EnergyPlus_Support] interaction between purchased air and infiltration

["carlosochoam" <carlosochoam@xxxxxxxxx>]

Dear all,

I'm simulating a module that has only one external, insulated wall with 
a double glazing window 10% of the floor area. The rest of the walls, 
floor and ceiling are adiabatic. The orientation is South and there are 
no equipment or light loads.

The model includes a constant infiltration flow rate of 0.04 m3/s, and 
uses Purchased Air without limits. Thermostat settings are 23.5 for 
cooling and 19.5 for heating (using dual setpoint with deadband). The 
system can operate 24 hours.

Certain summer night hours indicate an outside temperature of 20 
degrees Celsius. However, for those same hours and despite the 
infiltration rate, I get a report that the Purchased Air operated 
cooling in order to reach the setpoint. Is that possible?

Thanks a lot for your answer,
Carlos



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