KyungDong KDB-101GOM+ Installation Manual page 23

G O M + 표 준 형 - 영 문
Forced Draught Balanced (FF) Construction
■ The total length of the exhaust flue should be 3m or less, the curvature must be 2 or less.
■ The exhaust flue should be over φ75, φ80 or more depending on capacity.(see P62, 63)
■ Be careful not to allow the middles of the exhaust flue to become constricted and the
curvature must be constructed so that the diameter of the curvature is as large as possible.
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