Just make sure you have the right climate to use one.
Attic fan help ac cost.
Solar power is safer to use with an attic fan.
According to the article.
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.
Well mainly it s a way to save space.
The attic fan kept my house cooler by 8f compared to pre fan installation days.
Temp 84f at 5pm.
Good insulation reduces fan effectiveness.
An attic fan may not reduce your air conditioning costs but a whole house fan is a different story.
As stated above an attic fan can enable you to turn up your ac thermostat by as much as 10 degrees.
This was observed on numerous days following the installation.
Attic hvac systems save space.
In winter for instance attic vents help to remove moisture from the home.
After attic fan installation ac still off during day.
Most updated central air conditioned homes have a new air conditioner split system meaning the ac is broken up into parts.
If the attic fan increases the comfort level of the house it may be worth it.
Temp 92 f at 5pm.
Yet in summer the attic ventilation helps to keep attic temperatures down.
This ensures problems like mold and mildew are avoided.
However the utility of attic ventilation fans is actually quite a controversial topic.
A good window ac unit runs on 1 2 kilowatts and costs 14 cents an hour to run.
Most powered attic ventilators come with a thermostat which controls when the fan turns itself on.
They also create zones of negative pressure that could pull the ac cooled air into the attic.
So why put an hvac system up in the attic at all.
During workdays would leave air conditioner off when leaving in the morning.
Yes installing an attic fan raises the electric bill.
The cost of air conditioning vs.
An outdoor unit which houses the fan condenser and compressor and an indoor unit which holds the evaporator and fan.
If the attic fan keeps the house cool enough so that the owners leave the ac off there is almost certainly an energy benefit.
A good ceiling fan it draws only 30 watts to run costing about 1 cent per three hours of use.
These run 100 to 300 each and installation costs around 100 units without a thermostat run between 80 and 100 you can buy a separate thermostat humidistat controller for 40 to 50 since attics account for up to 20 percent of the average cooling bill fans that.
A three ton central air unit a common cooling system runs on about 3 kilowatts and costs about 36 cents an hour to run.
And that can result in real energy cost savings.