Up to 6 12 roof pitch use the standard formula as explained in this article.
Ross 150 roof vent.
Ross 150cm roof vent provides ventilation for flat roof applications with all the benefits of the ross 150.
Secure the base with a minimum of 8 galvanized nails.
Nails should be a minimum of 1 1 4 long and must penetrate the vent shingle and decking.
The ross 150cm roof vent has passed the tdi texas dept.
The ross 150cm utilizes all the enhancements of the ross 150 static roof vent but with a fabricated curb to easily install over a building curb.
The top of the ross 150 roof vent has a molded in peak.
11 12 roof pitch and higher increase the amount of ventilation by 30 percent.
It offers 150 square inches of net free venting area which means fewer roof penetrations saving time and money.
7 12 to 10 12 roof pitches increase the amount of ventilation by 20 percent.
For projects involving vents with motors the calculation formula is different.
The ross 150 roof vent is a patented design that has been tested and proven to perform.
The ross 150cm is a patented design product that provides ventilation for flat roof applications.