You will typically need 1 sq ft.
Cost of correcting vent to attic.
A 2 500 square foot housewith one story may need 100 to 150 linear feet more ductworkthan one of the same size with three floors.
The price of a carpenter to replace or install a gable mounted unit is about 70 an hour.
Adjust the cost with your zip code.
The contractor cost to install 2 attic gable vents is 422 vs.
Of vent space per 300 sq ft.
That will take it from the bath exhaust fan to a discharge point.
Because gable units are visible and can impact the curb appeal of a home some homeowners choose a more decorative version.
Of floor space in your attic.
Now where the discharge point is is going to be up to you.
Estimating the linear feet you need depends more on your home s footprint than the total square footage.
National average improvement and repair cost.
The average cost for a duct and vent professional is 100.
The do it yourself cost of 158.
The price of a duct and vent professional can vary depending on your area.
So what you want to do is you want to install a duct a vent duct and you can use flex duct for this.
3 to 10 per linear foot.
Basic static vents cost 30 50 to professionally install while larger and more complex vent types cost 185 245 to professionally install.