Hi!
I am modeling a high rise residential apartment/office building in Openstudio v2.6 located in Seattle, WA. I am having trouble confirming the infiltration is simulated correctly. I've built a shoe box residential floor and a shoe box office floor and applied the appropriate multipliers to each. Seattle code require 0.034 cfm/ft2 max infiltration per exterior suface area, so I've modeled this according to the clip shown below.
First of all, I'm assuming the units on Flow per Exterior Surface Area are a typo and should actually say cfm/ft^2 based on the units translated in the idf file.
The discrepancy comes when I look at the plotted variable "Zone Infiltration Standard Density Volume Flow Rate" and the EnergyPlus Output table. The values shown in the table for average Infiltration ACH as well as the minimum Infiltration ACH do not line up with the values shown in the plotted graph. For example, looking at E Office Zn, the minimum Infiltration(ACH) is listed as 0.007 ACH, when the graph shows a minimum of 37cfm (0.125 ACH). Can anyone give me some insight on what these two variables mean?
Another item I'd like confirmation on is whether the multiplier has been applied to the values shown in the graph or not. Because if so, the peak should be somewhere around 1000 cfm.
