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I think its a feel good thing, either hot air moving out of the attic turns the turbine, or wind, but either way, the turbine is outside, it is not connected to a fan inside, so just a straight opening with the same amount of square inches would vent as well,
Yes because it will make it spin faster and faster and it will break
they got into your attic by either keeping it open or finding a way to the attic from outside.
I would reccomend that you have an external vent for the air to go thru and not just into the attic alone.
If the attic is well sealed from the inside of the house and well vented to the outside the air can be considered the same.
The Federal Housing Administration recommends that you have at least one square foot of attic ventilation for every 300 feet of attic space. You can find out if you have enough by figuring out how many square feet you have in your attic and then figure out the lineal feet that your exhaust fan puts out.
NO, just duct it into the soffit. you can also get the indoor kit that is made for a dryer, but at some point you should install a vent to the outside,there are tons of vents.
Yes if it rains it will leak into the attic or overhead space until it is saturated then it will leak thru the ceiling.
When you say "exhaust vents in your ceiling" I assume you are referriong to the heating and AC vents inside your house and not the roof vent on the outside used to vent the attic. It is most likely that the duct work was ran in the ceiling for ease of installtion or the house may be built on a slab and they did not want to run the duct work through the slab.
Doing this will cause the house to go into a deep negative pressure. Pulling in the outdoor unconditioned air through all of the imperfections of your homes envelope also making doors to the outside which open in hard to close.
Sheldon Alan Silverstein wrote this poem: A LIGHT IN THE ATTIC There's a light on in the attic. Thought the house is dark and shuttered, I can see a flickerin' flutter, And I know what it's about. There's a light on in the attic. I can see it from the outside. And I know you're on the inside... lookin' out.
He go's up the vent and into the attic .You need to goo outside and use the tools to break the bars on the window and go into the attic.