It doesn t matter if the ventilation openings are spread out as long as there is sufficient space for all the air to escape.
Do i need two attic fans.
Often being situated on the roof attic fans are often in need of repairing or replacing following hail storms.
Do you need an attic fan if you have a ridge vent.
Note that these two feet would not need to be one large opening.
The whole house fan and the more.
So if your fan is rated at 1500 cfm you will need about two feet of totally open space in your attic.
However the utility of attic ventilation fans is actually quite a controversial topic.
These fans are designed to remove excess heat from your attic which in theory is supposed to lessen the load on the air conditioning in your home.
There are really two categories of attic fans.
With an attic fan you can cool the attic to the same temperature as it is outside greatly reducing the house from heating as quickly.
In a properly.
For both fans to work well they need large exhaust openings in the roof for the moving air to exit.
Ok i would definitely not recommend an attic fan.
Attic fans exhaust hot air from your attic to the outside.
Most either come with a programmable thermostat or can be wired to one which will turn the fan on when the attic reaches a set temperature no need for flipping a switch or monitoring the attic.
The downside of attic ventilation fans.
How an attic fan works.
This pressure balance improvement and the cooling provided by the air flow are most significant in the case of a leaky.
Good insulation reduces fan effectiveness.
Attic ventilation fans whether hard wired or powered by their own solar panels seem like a low cost and effective way to help keep your house cool.
During the summer an attic can be 40 to 50 hotter than the outside temperature which in turn heats up the house very quickly.
The ventilation that controls moisture from condensation and regulates the temperature in your attic relies on air circulation.
Exhausting moderate amounts of attic air as solar fans do can counteract this reducing infiltration my calculations show it to be about right for a vented attic but either do the calculations or measure the pressures.
Whole house fans need windows and doors open and attic fans need lots of soffit vents to suck.