My hip roof attic is kind of complex (attached car port); but basically it is 1200 sq feet, with about 20 feet of ridge; on which I have 15 feet of Shingle Vent II. That's not enough -- the attic hits 135 on sunny days in June (Maryland). And my ductwork is in the attic.
So I am thinking of installing Hip Ridge Vent (say, 8 feet down each of the four 25 feet long hip ridges).
The question is whether this would help. There seems to be disagreement about the effectiveness of hip vent (eg; does it short cut the soffit to ridge stack effect)?
Any experience or advice?
BTW: I have about 110 sq feet of slotted soffit, which should get me close to the 1200/300=4 sq ft of recommended soffet vent (assuing about 5 NFVA/lineal foot.
BTW2: I asked same question in an HVAC forum, and got mixed responses. Some thought hip ridge vent would help, others not. Static vents seem to be preferred, but not universally. And my local roofing company recommended a 2000 CFM power Lomanco.