GRAVITY VENTILATORS FAQs
Answers to your most frequently asked questions about Greenheck gravity ventilators.
Q:
Q:What is the maximum roof pitch that a ventilator can be mounted to without correcting the curb for the pitch?
A:
A:The recommended maximum roof pitch is 2:12 or 10 degrees from horizontal. Steeper pitches will increase the possibility of moisture infiltration into the building as a result of water splashing off the roof and entering the ventilator. For roof pitches greater than 2:12, it is recommended to have a pitched curb, which will allow the ventilator to sit level and not at an angle.
