Using a fan to blow hot air out of the attic doesn t address the radiant heat flow from the roof to the attic floor.
Attic fan useless.
If you stayed in a perfectly sealed house you would get sick and die.
If the gaps in your ceiling are so big as to allow too much air through then fix the holes.
One static vent style is the turbine vent which uses wind to power its enclosed fan all it takes is a light breeze to rotate the blades and suck heat out of the attic view example on the home.
The only effective means are more insulation preferred or a radiant barrier up against the inside of the roof.
Attic fans suck air out of the attic to the outdoors.
Even though a manufactured cover costs more it is far easier to install.
Powerful fans that are exhausting air from your attic work best when they can get ample amounts of makeup or replacement air from outdoors.
But don t go crazy you need oxygen anyway.
The lack of soffit vents may cause the fans to draw air up from the inside of your home.
This radiant heat in turn heats up the rafters and everything else in the attic.
It also requires no assembly.
Power vented attic fans are a true hazard vinyl is just gross no matter how you look at it fresh air intakes were a sad idea from conception.
The attic coffin you mention which is used to air seal and insulate pull down stairs scuttle hole or a whole house fan is good in theory but in practice is cumbersome to install.
Get help with your home improvement projects.
You are spot on with your comment about thermostats.
You need great soffit vents to supply the attic with all of the replacement air.
Attic fans installed properly don t suck any more air out of your house than a normal bath fan.
Much of that heat then conducts downward and finds its way into the house.
Mechanical attic ventilation fans may be powered in a variety of different ways.
A fan may be installed in an attic for the different purpose of cooling a whole house venting hot air out via the attic.
Most attic ventilators fitted to homes are powered off mains electricity.
Setting them back is what is important so an un programmed thermostat is just as useless as a manual thermostat.
Attic fans are typically used in warmer months when temperatures in an attic can exceed 120 f 49 c.
Send your questions to tom.
An attic fan does nothing to slow or stop radiant heat exchange.
Fans can cause increased loss of conditioned air.
