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, using the 4 supplied housing mounting rails. Single Pack Shipping Info Box Dim: 141/2" x 11" x 8" UPC: 0-8316227021-4 Shipping Weight: 5 lbs. CUL - TYPE IC RATED PROJECT LOCATION CONTRACTOR ARCHITECT ENGINEER SUBMITTED BY CFM IN W.G. RPM WATTS AMPS SONES QTY OPTIONAL EQUIPMENT & REMARKS U.S.: 820 Lincoln Drive West Chester, Pennsylvania 19380-4466 Tel: (877)-304-3785 Fax: (610) 696-8048 Canada: 110 Glidden Road Brampton, Ontario L6T 2J3 Tel: (905) 456-2033 Fax:(905)456-1015 Specifications subject to change without notice. Updated 1-06...