If it is the dead of summer and you have ductwork in your attic temperatures can reach as high as 140 degrees.
How long should you run an attic fan.
The net free area of a vent takes into account the resistance offered by its louvers and insect screens.
There are a couple of reasons why you may not want to run your fan.
When is running my furnace fan all the time not a good idea.
If you can improve ventilation in your attic and reduce the amount of heat the space holds and pushes into your home you ll reduce the cooling load on your air conditioner and save money on your utility bills.
The warm air escapes through the attic and to the attic vents allowing the circulation of chilly air from the windows.
Ventilation in your attic is one of the most important things that you can do for your home and an attic fan is the best way to ventilate the space.
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.
Simpler fan models generally have on off switches or dials that allow you to run the fan for a specified amount of time such as 15 minutes.
You ll need 2 to 4 times the normal area of attic vents or about one square foot of net free area for every 750 cubic feet per minute of fan capacity.
Many homeowners are under the assumption that ventilation is only important in the summer but this couldn t be farther from the truth.
If the switch on temperature is set too low you can bet that the fan will run all summer long and create a noisy disturbance.
Even if your ductwork is insulated it only does so much good against those kinds of temperatures.
When you have a fan you ll need to inspect it from time to time to ensure that it s working and in good condition.
Instructions for running a whole house fan.
If your attic fan seems to be running constantly it would be a good idea to bring in a professional to check it out and make sure it s still working properly.
A whole house fan can provide an energy saving alternative to air conditioning particularly when the air outside becomes cooler at night.
While yes ventilation is important when the temperatures are high it is just as important if not more.
Operation operating an attic fan is simple.
You may feel a less even distribution of heating and cooling because once the thermostat is satisfied the fan stops moving air to other spaces in the home.
Cons to setting fan on auto.
It helps to cool your home temperatures and the attic by approximately 30 degrees.
Taking a look at the belt and blades of each fan and checking whether there is dry rot will help you find out if the fan is in a good working condition.
When exploring the best attic ventilation practices consider installing an attic ventilation fan to keep the hot air from settling in.
