Throw duct leakage into the mix and the problems are.
Attic in ranch.
The bigger the house for whole house fans or attic space for attic venting fans the higher the cfm figure you need.
Some fans are twin speed so two cfm ratings are given.
I live in a small square house.
With a dedicated entrance sturdy flooring and plenty of natural light you can use your ranch attic for any number of things.
Adding attic vents is a simple matter of cutting holes and installing vents.
Mark the roof venting locations from the attic where you can see the rafters and avoid placing roofing vents over them.
Now that i know the ins and outs of attics i wanted to share more about what i ve learned about venting your attic if you don t have eaves.
But before you cut any holes plan the locations of the attic vents.
With hundreds of square feet of ductwork surface area in the attic and a δt of 75 f the air coming out of the vents in your home will be significantly higher than 55 f.
Photos 1 6 show how it s done.
Motor power given in amps or horsepower isn t a major factor so long as it generates the required cubic feet per minute.
It s a classic post war ranch house built in the 50s to meet the needs of the soldiers returning from ww2 and the needs of their growing families.
With attics that extend the entire length of the home.