Attic fans do cool down a house in less than an hour.
Does my house have an attic fan.
Noticed one of the attic vents was not working.
Even though an attic exhaust fan can incrementally lower the temperature of a very hot attic using a fan does not stop the source radiant heat.
It is designed to lower the temperature of an attic by exhausting air from the attic and replacing attic air.
Told that the 2 attic power vents are the only attic ventilation i have the house does have vented soffits every other soffit cover is vented.
Whole house fans work on the principle of removing the hot and humid air out of the house.
The whole house fan is installed inside the attic between the living space and ceiling.
This is why an attic fan will help ventilate the attic and bring in cool air.
You use it as an exhaust fan in conjunction with opening the windows of your home to pull a breeze through your entire home.
My apologies for using the rather vague term power ventilation in my post.
Good insulation reduces fan effectiveness.
The downside of attic ventilation fans.
Things have been ok low energy bills house very comfortable.
The whole house fans takes hot air from the house and moves it up into the attic and out through the attic vents.
Whole house fans need windows and doors open and attic fans need lots of soffit vents to suck cooler outdoor air up into the hot attic.
Essentially i do have a whole house fan but because of the rube goldberginess of my set up i was hoping to avoid full disclosure.
Without this open space the fans will not move much air.
A powered attic ventilator has a different purpose.
A neighbor gave me an elderly propeller fan with an approximately 300w per kill a watt motor.
A whole house fan is different than an attic fan.
Unlike a ventilation fan a whole house fan an attic mounted fan that exhausts air from a home at night is designed to cool a house that is to lower the indoor temperature.
The warm air escapes through the attic and to the attic vents allowing the circulation of chilly air from the windows.
A whole house fan is typically installed in the ceiling to your attic not in your roof.
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.
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.
However the utility of attic ventilation fans is actually quite a controversial topic.