... odors. * Long-life motor. * Metal housing with rust-proof paint. * Built-in damper to ... prevent air-back draft. * Easy installation, with adjustable mounting brackets included. * Duct diameter: 4" ... Keywords: fan, bath fan, exhaust fan, bathroom fan, ventilating fan, ventilation fan, ventilator, ceiling exhaust fan, ducted exhaust fan, greenhouse exhaust fan. Exhaust Fan with light - AFS80L1 ...