Installing Whole House Fans – An Air Conditioning Alternative

Installing Whole House Fans offer an Alternative to Cooling Your Home

By Mark J. Donovan

Installing whole house fans are an excellent alternative to air condition for cooling your home, as they typically require only 25% of the power of an equivalent air conditioning system.

In addition, whole house fans are lower cost and easier to install then central air conditioning systems.

However, installing whole house attic fans are more suited for areas where summer day temperatures do not regularly exceed 80o degrees Fahrenheit.

Whole house fans are ideal for small homes, or homes that do not have air ducts already installed in them. For example a small home heated off of forced hot water would be a great candidate for a whole house fan system.

Installing Whole House Fans in the Attic

Whole house fans are large fans that usually reside in the attic, and are installed and positioned over a main hallway.

A whole house fan operates by drawing in large volumes of cool air from the outside, via the home’s windows, and pulling the hot air from the living space out via attic vents.

Due to their size, and the high speed that homeowners typically run them at, whole house fans have been known to be notoriously loud.

Whole House Fan Technology

Whole house fan technology has improved over the years thus eliminating much of the noise associated with older models.

All metal, welded frames fans work best as they have fewer parts to rub together and create noise.

Also if properly installed, motor vibration noise can be prevented by installing the whole house fan on rubber mountings.

Air Vent Inc. 24″ Whole House Fan 54301 Attic & Whole House Fans

In addition, there are many things a homeowner can do to reduce or prevent the fan noise. First, it is usually best to install the largest whole house fan possible.

A smaller fan has to turn much faster to draw the same amount of air as a large one – the higher the revolutions per minute (RPMs) the louder the fan noise. In addition, smaller fans with higher RPMs typically have higher failure rates.

Second, the higher number of fan blades the quieter the fan. So when looking for a whole house fan it is best to select the largest model possible with the highest number of fan blades.

Installing Whole House Fans Requires Adequate Venting

Sufficient attic venting is required when installing a whole house fan. Typically 1 square foot of net free venting is required for every 700-800 cubic feet per minute (CPM) of air flow.

Frequently, there is insufficient attic venting when installing whole house attic fans, so it is critical that additional attic venting be installed when installing the whole house fan.

Inadequate attic venting can also cause noise and reduce the efficiency of the whole house fan.

Typically homeowners have whole house fans on timers that turn the fan on-and-off in the early evening. This also helps to mitigate the impact of any noise associated with the fans.

Attic Conversion Bid Sheet

Save time and money  with this Attic Conversion Bid Sheet when finishing your attic.

Whole house fans are not usually installed with thermostats, as whole house fans require some homeowner prep. Windows must be opened prior to the fan turning on for cooling to actually occur and to prevent the possibility of pilot lights from going out.

Hire a Professional for Installing Whole House Fan

It is recommended that a whole house fan be installed by professionals as they can ensure that the appropriate sized fan is installed properly and that adequate attic ventilation can be created. Typically installing a whole house fan can be completed within 1-2 days.

For help on Attic Conversion and Attic Renovation Projects, see’s Attic Conversion Bid Sheet. The Attic Conversion Bid sheet will help to ensure that you hire the right contractor so that your attic conversion project is built correctly, on time and budget.

Attic Conversion Bid Sheet

Related Information on Installing Whole House Attic Fans

Additional Attic Conversion and Home Remodeling Design Resources

Free Home Addition / Attic Conversion Price Quotes with No Obligation!

Fill out our 3-5 minute quick and easy form, and receive a free price quote on a attic conversion from one of our pre-screened and licensed home remodeling contractors. This process is free and there is no obligation to continue once you receive your attic conversion price estimate.