[EnergyPlus_Support] possible error for ACH calculation

[idoebber <idoebber@xxxxxx>]

When I use COMIS and obtain the infiltration volume (m3) and ACH for each 
zone, I checked to see if the ACH was the same as dividing the volume output 
by each zone's volume.  My output time step is in hours so I figured the 
volume outputed represented all the exterior air that entered the zone during 
that hour.  What I discovered was that my own calculated ACH was exactly 6 
times smaller then Energy Plus's ACH.  I figured it had something to do with 
my HVAC timesteps per hour being 6.  Is there an error with Energy Plus's ACH 
or am I going about this the wrong way.

Thanks
Ian


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