Options for attic ventilation
I live in North Carolina and am ready to do a roof replacement. My roof is steeply pitched, hipped, and has an 8' ridge at the top. The house has about a ~1200 sqft footprint. The second story is contained within the hipped roof (with dormers) for a total of about 1600 sq ft living space. The house is 15 years old.
The house has perforated soffits around the perimeter of the house for adequate in-flow of air (I think). Current attic ventilation is a ridge vent and has a power ventilator that is almost at the peak of the roof. (Although the power ventilator died a month ago.)
From reading this forum (and other sources) I discovered that having the ridge vent and the power ventilator are not good together.
From the calculations that I've done so far, it appears that I need at least 2 sq feet of net free area for exhaust and for intake. I think that I'm covered on the intake, but am concerned on the exhaust. By using only a ridge vent, it appears that I will only get about half of what I need for exhaust.
Is it OK to combine the ridge vent and some other form of static ventilation that is very near the peak to attain the 2 sq ft of NFA?
Or, should I be pursuing other options?
I'm nervous about reinstalling a power ventilator due to the motor burn-up and fire hazard.
Should I be looking at something like an auravent or a syphon ventilator?
Thanks for your help.