How Much Does it Cost to Install Attic Fans or Vents?

Typical Range:

$369 - $877

Find out how much your project will cost.

Cost data is based on actual project costs as reported by 2,659 HomeAdvisor members. Embed this data

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  • Homeowners use HomeAdvisor to find pros for home projects.
  • When their projects are done, they fill out a short cost survey.
  • We compile the data and report costs back to you.

Published January 10, 2022

Written by HomeAdvisor.

Cost to Install an Attic Fan

Attic fan installation costs an average of $596. Most homeowners can expect to pay between $369 and $877. Depending on the quality of the unit you choose, location, and add-ons, the project can run as little as $200, or as much as $1,300.

There aren't a whole lot of downsides to installation. Attic units reduce heat build-up in your attic, which can get up to 150 degrees F in the summer. That kind of heat can ruin what you have stored there, not to mention the hit your energy bills will take. This also reduces the life of your roofing materials.

Cost to Install a Whole House Fan

To add a whole house fan, homeowners pay between $1,250 and $1,830 on average. On the low end, you can expect to pay between $700 and $950 including labor. On the high end, the project can cost $2,000 to $2,750 including labor.

Whole house units, on the other hand, cool your entire home by pulling cooler, outside air in and circulating it with cross breezes from open windows. In mild to moderate climates, these can cool without air conditioning. In either case, controlling the heat at the top of your home and allowing for proper ventilation will be a great asset to your home.

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National Average $596
Typical Range $369 - $877
Low End - High End $200 - $1,400

Cost data is based on actual project costs as reported by 2,659 HomeAdvisor members.

Attic Fan Costs

the average cost to install an attic fan is $600 or $200 to $1,400.

Attic fans range in price from $80 to $400 or more. The model you choose will affect the rate to install. There is a range of models for both roof and wall installation.

Some models move more air than others, measured in cubic feet per minute (cfm). Others feature higher-end finishes. Solar units include a roof-mounted solar panel. Location may also change price. They installed through the roof or on a gable. All these factors affect your total project cost.

Roof Vent Fan Costs

Roof or ridge-mounted models range from $75 to more than $400. Price will depend on factors like size and airflow. In addition to cooling your attic, these systems:

  • Inhibit mold and mildew growth by reducing moisture

  • Prevent dust and dirt from settling in the home

  • Are easier to mount


Gable-mounted models cost between $75 and $300 depending on size and airflow (cfm). They offer the same advantages as roof units in most ways. However, manufacturers make these fans in larger sizes, giving them more cooling capacity for larger areas. They can also be easier to install if an existing gable vent is already present. Installation will not require roof work or disruption of shingles. Leaks are also less likely because the units exist on a vertical surface and are covered by a roof overhang.

Solar-Powered Attic Fans

Solar-powered ventilation systems run from $200 to $500 or more. While more expensive up front, they cost nothing to operate once placed. Energy Star-rated solar units may also qualify homeowners for a federal tax credit.

These models also draw less air than electrical ones. As a result, they do not create zones of negative pressure. Therefore, they reduce efficiency by pulling conditioned air from the inside out. The lack of backdrafts also means the unit will not pull dangerous gases from combustion appliances back into the home.

Whole House Fan Costs

Whole house fans range in price from $300 to $1,400 or more. To reap all of the benefits of a whole house ventilation system, you must choose the correct size and airflow. These factors will also affect the price of the unit.

You install the unit in a central location in the upstairs ceiling and vent it through the attic. The fan draws hot air from within the home. Open windows create drafts and fill the home with cool air from outside.

These units are more energy efficient, more cost effective to operate, and easier to put in. They also

  • cool more quickly than a central AC unit when the external air is cooler than the inside air,

  • operate quietly,

  • freshen indoor air,

  • prevent odors, and

  • provide ventilation throughout the home.

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Exhaust Ventilation Fan Installation Prices & Factors

Installation may require the expertise of more than one contractor. Labor rates vary based on the model you choose and your existing home features.

A roofing professional should work with roof-mounted units. A licensed, experienced roofer will charge between $45 and $75 per hour. The process will take approximately two hours, for a total labor cost of $90 to $150.

When a vent is not already present or needs modification to fit a gable-mounted unit, a carpenter can perform the work. He/she can also make the ceiling modifications necessary for a whole house ventilation system. Carpenters charge around $70 an hour. The work will take approximately two hours, for a total labor cost of approximately $140.

You will need to hire an electrician to connect your electric or solar unit to your home's electricity source. Your pro can also mount and connect solar panels. Wiring will take at least one hour at a rate of $65 to $85 per hour.


In addition to the fan, you'll also need caulk, plywood, and a few electrical items for installation. None of this should break the bank, but it's something to consider as part of the overall cost.

  • Shingles: $100 per square foot

  • Siding: Up to $100. Cost depends on the size of the hole.

  • Caulking: About $4 to seal the unit

  • Gable-Mounted Vents: Between $10-$60

  • Roof-Mounted Vents: About $40


Prices will be similar whether you choose to place your powered ventilator on the roof or on a gable wall. The cost to add a roof unit might be slightly higher since it means cutting a hole in the roof, and then placing shingles above and around the plastic or sheet metal bases that serve as the flashing.

The price to install into a gable wall depends on if you're choosing to install it in place of an existing vent. This might be a cost-effective option since you'll probably only need to widen that opening to fit. If you need to cut a hole into the wall, then it might be slightly more expensive.

Humidistat & Thermostat

Most powered attic ventilators come with a thermostat, which controls when the fan turns itself on. 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 turn on and off automatically are a worthwhile investment.

More expensive models usually include a humidistat as well. Models with this feature will help to control excess humidity. This can be a problem in colder months, and can cause

  • mold

  • mildew

  • peeling paint

  • decaying shingles

  • warped beams and floorboards

Whole house fans do not include a humidistat or thermostat. These systems operate only when needed. A homeowner manually turns the machine on and off, usually in the morning or evening when it is cooler, for 30 minutes to an hour.

Attic Conditions

The condition of your attic will also contribute to the cost of installation. If it's difficult to access it, then it might increase the price. It's smart to clear some space if you have things stored up there. If moisture has wreaked havoc on the floorboards, then it might be dangerous to walk around. This would mean your professional will have to be careful, which could potentially make the project take longer and be more expensive.

Both systems require attic access. Most pros will perform an initial inspection before they quote the work. Speak with your service providers about concerns about access or safety hazards at that time.

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DIY vs. Hiring a Pro

In most cases, you can install passive, gable-mounted vents yourself. If you are mounting on your roof or are adding an electric or solar-powered fan, you will need to hire a professional roofer, carpenter, and/or electrician.

Overall, installing an attic fan is beneficial for ventilation and will lower your energy bills. The cost will be mostly determined by the current state of your attic and where you decide to place it. Make sure to talk to at least three professionals to find someone you trust and who understands the needs of your space. They'll be able to help you decide the best route for installation.


Why install an attic or whole house fan?

A powered ventilator lowers the temperature of the attic to reduce how hard a home's AC system has to work. A whole house fan lowers the indoor temperature of a home by removing warm air. Both models reduce energy consumption.

Which is better: whole house or attic fans?

Whether a whole house or attic style is better for you will depend on a variety of factors. For example, attic fans will not raise home value but they are cheaper to purchase and install, while whole house are more expensive and can raise your home value. Also, whole house styles depend on a lower outside air temperature, while the attic styles can work with high temperatures.

Who installs attic and whole house fans?

Depending on your specific situation, you may require more than one professional contractor. A roofer should add the roof-mounted systems. A carpenter can make necessary structural modifications needed to place gable-mounted and whole house systems. Electricians can wire the unit to your home's electrical supply and mount and connect solar panels.

How much does it cost to repair or replace a fan or motor?

Depending on the problem, the price of repairing an attic fan ranges from $180 to $400.

How do I install or replace a bathroom ventilation fan?

A bathroom ventilation fan is different from an attic or whole house unit. Installing or replacing a bath fan costs just under $400. Because bathroom fan projects include electrical wiring, homeowners should consult a professional electrician.

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