Just make sure you have the right climate to use one.
Attic fan ac save.
Most homes already have some passive attic venting built in.
An attic fan may not reduce your air conditioning costs but a whole house fan is a different story.
It s always a good idea to run the whole house fan any time the air outside is cooler than the air inside.
126 302 at 90 savings.
This prevents hot air from seeping into your home and driving up the temperature in the living space which reduces the load on your air conditioner.
In colder months attic fans can help you avoid damage.
Cool air enters the attic through soffit vents in the eaves.
Using a whole house fan can result in a savings of over 300 each month of running a 3500w a c unit during the hottest part of summer.
70 168 at 50 savings.
In the summer you can drastically reduce the temperature in the attic helping to lengthen the life of the roofing shingles and sheathing.
Whole house fans such as those from quietcool can save 50 90 of a c electricity costs.
Larger homes that need larger a c units can.
As stated above an attic fan can enable you to turn up your ac thermostat by as much as 10 degrees.
This means your air conditioner will not have to work as hard to do its job and may even cycle on less.
So an attic fan i think generally is a bad idea.
When a c typically costs 140 336 per month that s a savings of.
Overall this saves you energy which saves you on your monthly utility bills too.