GE GFDR485GFRR Installation Instructions - Page 25

Installation Instructions EXHAUST LENGTH Using exhaust longer than specified length will: • Increase the drying times and the energy cost. • Reduce the dryer life. • Accumulate lint, creating a potential fire hazard. The correct exhaust installation is YOUR RESPONSIBILITY. Problems due to incorrect installation are not covered by the warranty. The MAXIMUM ALLOWABLE length of the exhaust system depends upon the type of duct, number of turns, the type of exhaust hood (wall cap) and all conditions noted on the chart. • Internal elbows added for side or bottom vent conversions must be included in the total elbow count. • Any elbow greater than 45° should be treated as a 90° elbow. • Two 45° elbows will be treated like one 90° elbow. • For the side exhaust installations, add one 90° elbow to the chart. • The total vent system length includes all the straight portions and elbows of the system (transition duct included). EXHAUST LENGTH RECOMMENDED MAXIMUM LENGTH Exhaust Hood Types Recommended Use only for short-run installations 4" DIA 4" DIA 4" DIA No. of 90º Elbows 0 1 2 3 4 4" Rigid Metal 90 Feet 60 Feet 45 Feet 35 Feet 25 Feet 21ø2" Rigid Metal 60 Feet 45 Feet 35 Feet 25 Feet 15 Feet 25