NuTone 9965 Heat-A-Ventlite Heater, Fan and Light, 70 CFM 100 Watt 1500W heating element and 70CFM ventilation fan provides optimum performance in bathrooms up to 65 square feet, so you can have a touch heat just when you need it Bright 100W incandescent lighting provides clean, even light for pleasant surroundings and enough light to focus on the details 7-Watt nightlight provides a soft glow to light your bath during those night time visits 4.0 Sones sound rating.Fan, light and heater function works independently or together, so you control the environment and choose your comfort factor Duct Size:4 inches Soothing heat (fan-forced) Powerful ventilation Bright ceiling light Convenient night light Includes four-function switch