Please check your attic for mold check your roof for outlet vent styles and take the appropriate action to eliminate more styles of vent before winter because less is more ron hungarter is a licensed contractor.
Mixing roof vent types.
As a result in certain situations it is acceptable to mix different types of static vents.
One of the consequences of mixing attic exhaust vent types can be weather infiltration such as the snow in this photo.
Over the brief 15 year life of the roof when the power vent would turn on it turned the four box vents into intake vents which sucked water into the attic and destroyed the roof deck adjacent and below the vent.
The building codes and building science for.
The saying more is less applies to exhaust vents for an attic.
The reason is simply due to the fact that various types of roof exhaust vents provide varying amounts of exhaust ventilation.
It is not advisable to install more than one type of roof exhaust vent upon a roof.
Vent roofs with steeples towers or cupolas can be found in different buildings from barns to cathedrals.
Mixing different types of outlet vents interferes with that flow of air.
The idea of roof vents existed for hundreds of years with natural vents employed in chinese buildings during the tang dynasty natural ventilation ducts in the buddhist monks caves and wind catchers incorporated in arabian architecture.
Therefore reduce multiple outlet vent types to only one.
Mixing or combining two or more different types of exhaust vents ridge vents wind turbines roof louvers gable louvers roof mount power fans and gable mount power fans on the same roof above a common attic can actually short circuit the attic ventilation system.
Remember not every home is designed the same.