Rooftop fans and gable fans.
Hvac attic fan.
An attic fan works by exchanging the hot air in your attic space for fresh air pulled through the vents.
However the utility of attic ventilation fans is actually quite a controversial topic.
You may also bring in more humid and dirty air into the system which then gets circulated throughout your.
Good insulation reduces fan effectiveness.
Unless you plan to convert your attic to a living space it doesn t make sense to seal it and route your hvac vents up there.
There will be less duct leakage.
There are two basic types of attic fans.
Most updated central air conditioned homes have a new air conditioner split system meaning the ac is broken up into parts.
But you can install attic fans which will continuously replace the stagnant air with fresh outdoor air preventing your attic from turning into an oven.
The interactions of the stack effect wind hvac equipment with duct leaks and attic fans are complicated and unpredictable.
This will help to avoid premature damage to the shingles or mold building up in moist hot.
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.
Quietcool attic fans work almost everywhere almost anytime.
All ducts are at risk for this type of leakage.
Sometimes air conditioned air will seep right through your ducts and become useless instead of heating and cooling your home.
Here s why that is a good thing.
An outdoor unit which houses the fan condenser and compressor and an indoor unit which holds the evaporator and fan.
Attic hvac systems save space.
How whole house fans work the whole house fan pulls air in from open windows and exhausts it through the attic and roof.
The downside of attic ventilation fans.
During the summer an attic can be 40 to 50 hotter than the outside temperature which in turn heats up the house very quickly.
So why put an hvac system up in the attic at all.
Attic ventilation fans offer mechanical ventilation using a fan to draw in cool outside air and force out warm moist air.
In addition to whole house fans the ducts of your central heating and cooling system can be modified to provide whole house cooling.
During the summer months the ducts in your attic and close to your walls can fill with warm air resulting in the fan blowing hot air into your house.
Therefore you may end up running your ac even more to counterbalance the extra heat.
Adding two more fans to the mix instead of addressing the real problem which is the leaky ceiling is risky.
Attic hvac systems also require shorter ducts.
