blow through????

Does anyone know where i can get any info on blow throughs???

There is not going to much to find. As this is an applacation. The rule of thumb; the opening area of the cut out of the wall, needs to equal at least 80% of total cone and/or port(s) surface area.

Scott....do you still need info on this?
Email me through my site or my main email if you still have it.
Or call me again as I lost your number.