Attic Fan vs. Whole House Fan

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Attic fans and whole house fans are two commonly used devices to fasten the circulation of indoor air.

Attic fan is adopted mainly for lowering the high temperature of attic, while whole house fan is responsible for cooling down hot weather of whole living places.

Both of two fans can work perfectly if used in proper situations.

So what exactly difference do they have?

How to choose between the two types?

Go on reading, you will find your answer.

Attic Fan vs. Whole House Fan

Attic fans Whole house fans 
+ Easy to install-Easily cause drawback of carbon monoxide+ Cool down interior temperature- Difficult to install
+ Quite cheap for whole installation costs and using costs- Low cost efficient+ High efficiency in cold days- A bit expensive for installation costs and using costs
+ Prevent moist air from getting into rooms in winter
- Electric fans are forbidden in some areas+ Cool down living spaces in one hour- Loud noise
+ High efficiency in hot days- Loss of heat in cold days
+ Low down temperature on attics

Installation spots

Attic fans are normally gable mounted or roof mounted, thus you can either install it in the existing gable vent for garage or greenhouse use, or to place it on the roof to cool down temperature on roof.

For best gable mounted attic fans, we would highly recommend this Iliving 18 Inch Variable Speed Shutter Exhaust Fan to you as follow,

Iliving 18 Inch Variable Speed Shutter Exhaust Fan, Wall-Mounted, 18″

best attic fan vent

For best roof-mounted attic fans on the market, the following type will be a best choice:

Broan 349BR Roof Mount 120-Volt Powered Attic Ventilator, 1000 CFM, Brown Dome

best solar fanIn mid-summer, the attic will be extremely hot because of long term sunburn, the hot temperature will affect the life span of the house component, what the most important is that it causes high temperatures for living spaces. Especially when you are living in a two-story house, the top room can be hard to bear.

Through the operating of the attic fan, the temperature of the roof will be lowered down effectively.

Whole house fans, quite the same as attic fans, are installed on the ceiling. However, they are used mainly for pushing interior hot air out and make you feel cool in living space.

However, it can not work perfectly alone, you need to keep windows open or rely on a central air conditioner. It works brilliantly especially when the outdoor temperature is higher than the indoor temperature.

Installation difficulty

Attic fans are quite easy to install because of their small sizes when you have an existing vent, it becomes even easier. However, for solar attic fans, you need also to get a solar panel.

Both of two fans need to be installed by professionals if you lack of enough knowledge. They need electricians to wire the new fan.

Price/Using Costs

For attic fans, you can get a best one at $80-$400, each with different performance and sizes. If counted on installation costs, the whole costs reach approximately $350 to $800.

On the other hand, buying the best whole house fan takes about $150-$550. Its installation costs are much higher, the whole costs reach from $300-$1400.

Effective Usage

Attic fans work best in hot day, for it cools down roof temperature effectively in summer.

However, you can also use it in winter. In cold weather, moist air causes great damage to roof components and also be bad for living places. Once operating your attic fans in winter, it expels moist air on the roof out.

Whole house fans need to be used along with windows or air conditioners. In cool days such as falls or spring, you will find it super effective.

Energy Efficiency

In the early days, most people believe that attic fans can be quite energy efficient because average attic fans draw only 300 watt. However, some experts claim that there is no evidence to prove it to be high energy efficiency.

With the expansion of the debate, many states have forbidden the use of electric fans. Such as in the 2009 Energy Conservation Code, the state of Georgia determined that electric fans are not cost-saving devices, and thus banned the use of them.

Therefore, if you are concern mostly on energy efficiency, whole house fans can be a perfect choice. They draw 200-700 watt with different sizes and specifications. For long term use, you will find using whole house fan can be 90% less cheap on using costs compared with air conditioning units.

As a energy efficient cooling device, you should also guarantee the sealing of whole house fan in installation. If under bad sealing conditions, cold air gets into the house easily and causes loss of hot temperature in cold days.

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