Attic Fan Costs

Attic fans are a mostly functional choice for doing ventilation. They remove hot and/or humid air from the attic space, providing for longer roof life and reduced energy load on other HVAC systems of the house.

You will find that the typical cost of a fully installed average attic fan will vary by motor rating, fan dimension, mounting type, overall finish quality, and the labor rate. There are passive-powered solutions (wind) and traditional electric-motor types.

In the following tables the Labor Cost figures are what the able DIY persons should expect to save by performing the complete installation.

Attic vent: wind powered spinning-turbine head, attic up to 800 sq.ft.

ItemUnit CostQuantityLine Cost
12" diameter vent: no motor, 1250 CFM (with high wind), galvanized steel, roof-mounted.$39each1$39
+ Labor Cost$116each1$116
Total Cost$155each1$155


Attic fan: gable mount, louvers, attic of up to 25' x 100' = 2500 sq.ft.

ItemUnit CostQuantityLine Cost
15" diameter fan: with thermostat and wildlife screen, 115VAC, 1300 CFM, aluminum/steel.$149each1$149
Humidity switch: starts fan at humidity set-point.$39each1$39
Material Cost$188each1$188
+ Labor Cost$87each1$87
Total Cost$275each1$275


Attic fan: roof mounted, dome shape; attic up to 32' x 75' = 2400 sq.ft.

ItemUnit CostQuantityLine Cost
15" diameter fan: with thermostat and wildlife screen; 115VAC, 1250 CFM; galvanized steel.$109each1$109
Humidity switch: starts fan at humidity set-point.$39each1$39
Material Cost$148each1$148
+ Labor Cost$138each1$138
Total Cost$286each1$286


Attic fan: gable mount, louvers, attic of up to 32' x 50' = 1600 sq.ft.

ItemUnit CostQuantityLine Cost
14" diameter fan: with thermostat and wildlife screen, 115VAC, 1020 CFM, aluminum/steel.$165each1$165
Humidity switch: starts fan at humidity set point.$39each1$39
Material Cost$204each1$204
+ Labor Cost$87each1$87
Total Cost$291each1$291


Attic fan: gable mount, louvers, attic of up to 30' x 100' = 3000 sq.ft.

ItemUnit CostQuantityLine Cost
15" diameter fan: with thermostat and wildlife screen, 115VAC, 1600 CFM, aluminum/steel.$195each1$195
Humidity switch: starts fan at humidity set-point.$39each1$39
Material Cost$234each1$234
+ Labor Cost$87each1$87
Total Cost$321each1$321

Other considerations and costs

  • During summer the attic fan will help cool the building and reduce A/C operation.
  • During winter the fan will remove humidity, extending the life of the roof and attic.
  • Taxes and permit fees are not included in these prices.
  • The installer must have the proper electrical and mechanical installations tools.
  • The installer must work safely atop a ladder, and be able to make necessary modifications and connections to an appropriate electrical circuit that passes near the fan location. 

DIY considerations

  • Other situations that require structural modifications of the building, or more extensive installations throughout the building, or new electrical circuitry are much more appropriate for professional service.

References

  • Craftsman Estimator Costbook, complete series year 2015.
  • Latest prices found on Home Depot and other vendor Web sites.
  • Literature review of DIY Web sites.

Cost to install an attic fan in my city

Cost to install an attic fan varies greatly by region. To get free estimates from local contractors, please indicate yours.