Tunnel Greenhouse Venting Fan. Get free estimates from local contractors who can Install an Attic Fan. 4 Critical Things To Consider When Installing An Attic Fan Attic Fan Attic Fans Install Attic Fan The total cost will vary depending on attic conditions and the complexity of the project. Attic fans installation cost . International Shipping Only 2495. Most homeowners can expect to pay between 369 and 875. 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 1300. Attic Fan Installation Costs Most homeowners spend between 394 to 546 nationally. Cost estimate includes standard fan hardware and supplies. This key will serve as your guide. Attic Fan Installation 31270 to 41216 fixed fee includes mid-grade attic fan Manhours for attic fan installation are included in price. Costs to install powered attic fans. Ad Poultry Farming Cool Fan. Ad Shop NCAA NFL MLB NBA More. Attics can reach temper...