
Dimensions 81/4"x 8" x 57/8". Lamping Information 1 - 250 watt maximum, type R40 bulb, medium base, 850 Btu. Duct Collar Plastic collar for 4" duct connection, comes complete with built in non-metallic back draft damper for quiet operation. Unit Mounting The housing will mount in ceilings with at least 6" of clearance and through drywall thickness up to 3/4", with a rough-in opening of 81/4" x 8". Rated for ceilings insulated to R-40. The housing will mount between 16" on center joists, us