The maximum straight duct length for the hood is 100 feet. For each elbow and transition added to the duct work, a certain number of feet must be subtracted from the maximum straight length to compensate for wind resistance. To determine the length the duct work cannot exceed, subtract all of the equivalent lengths of the elbows and transitions listed below from 100 feet. DUCT PIECESUBTRACT 90 elbow15 feet45а elbow9 feet3 1/4 x 10Ԕ to 8 round 1 foot Wall cap with damper30 feetRoof cap30 feet > REAR EXHAUST DIAGRAM Web: http://www.Dacor.com Corporate Phone: 800-793-0093Specifications are subject...