Patented rings instead of solid-steel housing, which pulls more air
Automatic shutter available in white, but can be painted to coordinate with home's exterior
One power attic ventilator is usually sufficient, unless it's a very large attic
Roof-mount power vents are ideal for hip roofs
Feature a preset adjustable thermostat for maximum homeowner convenience
Gable-mounted power vents are an excellent option for tile roof ventilation