Segmented collar saddles allow fabricating round branch ducts from square ventilation ducts. The installation requires cutting and opening in the duct being branched and fastening the piece with rivets or screws. The joint needs to be sealed with a silicone or acrylic compound. The saddle's form improves the air flow compared to standard ILSL collar saddles.
This product is specifically recommended for branching systems that require air tightness class D according to EN 12237.
