[Equest-users] Modeling Infiltration and Windows

[Alex Krickx]

Hello all,

I am interested in modeling the energy savings that occurs when windows are replaced with lower-infiltration alternatives. In the wizard mode, the only place that I see infiltration is under the "Building Envelope Constructions"  Screen.

I'm hoping someone can confirm my methodology:

Can I input a weighted average of window and wall air infiltration here?  If I'm looking at a building with 20% Window to Wall Ratio, and the windows have 0.1 CFM/ft² while the walls have 0.04 CFM/ft²can I apply an area weighted average into this box? I would take (20%*0.1+80%*0.04) as the façade infiltration value.

That way I could use the same formula to determine the area weighted infiltration of the façade if better windows were installed.

How do other people model this?

Thanks in advance!

Alex Krickx


Alex Krickx
Building Energy Specialist
[cid:image001.jpg at 01CABED9.125DD380]
1250 Elko Dr, Sunnyvale, CA 94089
(t) 408.541.8124

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