Electrolux EI36DD10KS Complete Owner's Guide (English) - Page 14
Calculating Duct Length Table
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14 Installation Calculating Duct Length Table For maximum efficiency, use the shortest and straightest duct possible. The system will operate most efficiently when the ductwork does not exceed 60 feet of equivalent duct. The downdraft will operate properly with ductwork up to 100 equivalent feet of duct. Calculations are approximate and based on HVAC industry standards. 8" or 10" (20.3cm or 25.4cm) ROUND DUCT PIECES Straight EQUIVALENT LENGTH X NUMBER USED = Measure length of Straight duct and write here EQUIVALENT LENGTH Ft. or m Round Metal Flex - No Bends 1.5 Ft. (0.45m) Ft. or m 90° Elbow 10 Ft. (3m) Ft. or m 45° Elbow Round Wall Cap with Damper Round Roof Cap 10" to 8" Transition 3¼" x 14" (8.2cm x 35.6cm) RECTANGULAR DUCT PIECES Straight 90° Elbow 45° Elbow 90° Flat Elbow 8" (20.3cm) Round to Rectangular Transition 90° Elbow 8" (20.3cm) Round to Rectangular Transition Wall Cap with Damper 5 Ft. (1.5m) 25 Ft. (7.6m) 25 Ft. (7.6m) 5 Ft. (1.5m) Measure length of Straight duct and write here 10 Ft. (3m) 5 Ft. (1.5m) 15 Ft. (4.6m) 30 Ft. (9m) 5 Ft. (1.5m) 25 Ft. (7.6m) TOTAL DUCTWORK Ft. or m Ft. or m Ft. or m Ft. or m Ft. or m Ft. or m Ft. or m Ft. or m Ft. or m Ft. or m Ft. or m Ft. or m