Here is a free download from EPA “I-Beam” this software is very useful and informative. It deals with IAQ. Follow the link below.


Thanks Mario, that was good Info.

I am getting geared up to start a $1,000,000 upgrade at this College site right now to do just that, up grade the air quality using HRV’s.


Your welcome Marcel!!

I find I use I-Beam more often now.