Purchasing an electric or solar attic fan may not provide the savings that homeowners expect.
Ridge vent roof fan.
This is different from soffit vents which allow air to travel into the attic.
That means you have a lower risk of mold or mildew development.
When the power vent goes on it can actually pull air from the ridge vent which can cause an imbalance of airflow along the underside of the roof deck.
In this case the ridge vent pulls its intake air from the power fan which can lead to weather infiltration and poor ventilation along the underside of the roof deck.
When the power vent goes off it acts like a roof louver an opening on the roof without a motor.
Roof ridge vents do work well when there are soffit vents or box vents that help to draw air into the attic.
And how they work together is that the wind blows and it presses up into the soffit vent rides up under the roof sheathing and then exits at the ridge.
A roofer installs a ridge vent.
Like attic fans ridge vents are designed to exhaust air that is already inside the attic.
While a power vent fan combined with a ridge vent can work against the natural flow of air through the attic it will still exhaust more hot air than not having a fan at all it s just not the most efficient way to go about it.
The quicker you can uniformly exhaust all of the hot moist air out of your attic or shed the better it is for the life of your roof and the health of you and your home.
The ridge is always in a depressurized area of the house because the wind hits that and sort of bounces off the roof and goes in a circular motion which causes a draw at the ridge.
And i know that that air foil speeds up the depressurization and will make the attic ventilation much more effective.
Ridge vents are a passive system simply allowing hot air to rise up through them rather than pushing it out as a fan does.
Adding roof ridge vents can reduce summer air conditioning costs prevent roof mildew and rot and keep your roof in better shape longer.
It s a metal vent ridge vent that sits on top of your roof and it has an air foil to the side of it.
You will also discover that this product can work by itself to release moisture from the house which is especially useful during the winter months.