Since sunlight on the roof is the major source of attic heat attic fans are most useful during daylight hours.
Run attic fan and ac at same time.
For the ac this means keeping the thermostat closer to the temperature outside.
The attic fan consumes much more electricity than any possible saving from reduced air conditioner run time.
It may seem counterproductive to run your fan and your air conditioning at the same time since both use energy to operate.
Today ceiling fans are the best selling variety of fan in the united states.
It is important to remember that you should never use the fan mode for a central air conditioning unit the same way you use a regular room fan.
The drawback is that you will also draw in the humidity of the outside air.
Essentially you can use your ac unit and your whole house fan together.
This can cause problems with your thermostat and overall hvac system.
However if the air outdoors is cooler than the air indoors it doesn t make a whole lot of sense to turn your air conditioning system on.
The trick is to use them wisely and on lower settings.
Typically people who live in areas that get hot during the day and cooler at night often turn their whole h.
During the summer there is always a benefit to a cooler attic.
If it s 80 degrees outside that means setting the ac to run at 78 or 75 instead of 70.
If you were to turn on the air conditioner your air conditioner will work very hard because it will work hard trying to.
Running the fan for a long period of time with any system central air or window box will also increase the humidity in the room.
It helps to cool your home temperatures and the attic by approximately 30 degrees.
The warm air escapes through the attic and to the attic vents allowing the circulation of chilly air from the windows.
Increasingly ceiling fans are used not as an alternative to air conditioning but as an accompaniment.
Whole house fans work on the principle of removing the hot and humid air out of the house.
One energy concern with whole house fans is heat loss in the winter.
This means running the whole house fan will cost approximately 90 percent less than running a central air conditioning unit for the same amount of time.
Both types of attic fans are popular as solar powered equipment.
That s why the energy required to run an attic fan is wasted.
