Dacor DTHP48 Installation Instruciton - Distinctive Wall Mount Range Hood - Page 12

Preparation and Setup Ductwork Tips Wherever possible, reduce the number of transitions, turns, and sharp angles. Two staggered 45° angles are better than one sharp 90° angle. Keep turns as far away from the hood exhaust as possible, and keep as much space between any bends as possible. For best performance: use round duct instead of rectangular, especially when elbows are required. If multiple elbows are used, try to keep at least 24 inches of straight duct between each elbow. Avoid using "S" or back-to-back adjacent elbows. In extremely cold weather regions, use thermal breaks, i.e., short sections of non-metallic duct, to avoid indoor heat loss. Locate the break as close as possible to the outside pass-through point. Do not use flexible metal duct. Do not use ductwork that is smaller than what is advised in the tables. • The hood exhaust connects to an 8-inch round duct. You can increase the duct size over the duct run if desired. • To prevent a backdraft, never decrease the duct size over the run. If existing ductwork is smaller than 8 inches in diameter, remove it and replace it with 8-inch ductwork. • Do not rely on tape alone to seal duct joints. Fasten all connections with sheet metal screws, and tape all joints with certified duct tape or foil tape. • Use sheet metal screws as needed to support the weight of the ducting. • To prevent backdrafts, a damper at the duct outlet may also be required. (EHnolalrdgiendgfoBr rDaectakiel)ts Holding Brackets WARNING • The electricity to the range hood should be installed only by a licensed electrician. • Observe all governing codes and ordinances during site preparation and installation. Contact your local building department for further information. • Failure to properly anchor the hood to the wall may result in personal injury due to the unit falling off the wall. • To avoid an electric shock hazard and property damage, locate electric wires and water pipes and avoid drilling or cutting in the vicinity. • Use the temporary holding brackets only to hold the hood in place until permanent anchoring is secured. 10