Continuous ridge vents allow hot air to readily escape from the roof peak. Most manufacturers now use a durable plastic, or aluminum, to avoid rust. If using plastic in cold climates, make sure it is rated to withstand subfreezing temperatures. Box Vents. Box vents are not mechanical vents and work better when used with soffit ventilation.
I have read some literature (taken w/a grain of salt - from vendors) that profess design that will prevent precip intake through the cupola and provide sufficient venting. I do not live w/in 100 miles of the coast but will certainly investigate the possibility of remote or "sensed" control of cupola vents.
Our Universal Vent is a low profile off ridge roof vent designed for sloped roofs and can be used as an air exhaust or intake vent. Our UL certified Universal Vent withstands wind pressure speeds up to 200 mph! Its low profile design looks great on shingled roofs as well as parapet walls.
Roof-mount Power Attic Vents. Electric-powered attic vents use a thermostat and humidistat control to monitor heat and moisture buildup inside the attic. Featuring a low-profile dome, the power attic vent is unobtrusive when installed on the roof slanting away from the front of your home.