Highlights:

• Utilizes two 250 watt maximum type R40 medium base infrared lamp (lamp not included). Metal duct connection collar and damper protects against back drafts
• Rated type IC for ceilings insulated to R-40
• Low profile grill
• Easily installs using the included adjustable hanging brackets
• 4" round plastic damper protects against back drafts and ensures quiet operation 

Specifications:

• HVI Certified CFM :  @ .10 SP: 70
• HVI Certified Sones :  @ .10 SP: 3.5
• Sound Level  :  Moderate
• Heat Bulbs :  2 - 250 Watts (not included)
• Duct Size :  4" round
• Collar/Damper  :  Plastic
• Mounting  :  Included hanger bars
• Effective Ventilation : Bathrooms up to 65 sq. ft. & Other rooms up to 85 sq. ft.