Air King AK917 Bulb Heater with Exhaust Fan, Single Exhaust fan with heat lamps' grill measures 10" wide x 10" deep, with housing measurements of 8" long x 8" wide x 5-7/8" deep Operates at 70 CFM at 3.5 sones and comes with a low-profile, white polymeric grill and one-piece polymeric blower wheel Uses two 250-watt maximum type R-40 medium base infrared lamps (lamp not included) for just the right amount of silent heat Protects against back drafts with 4" round metal duct connection collar and damper Fan is UL-listed, HVI 2100-certified, and rated Type IC for ceilings insulated to R-40 It easily installs using the included adjustable hanging brackets Uses one 250-Watt maximum type r40 medium base infrared lamp (lamp not included) Powerful 70-CFM exhaust fan, HVI certified Low profile grill 1-Year parts only warranty