Duplex 152 Anti-Downdraught Cowl

Built for a cottage with a single flue and two rooms to warm, Duplex 152 joins with a spigot and socket and locks with a band clamp.

Seams are welded, not folded. A folded seam is the first thing to open when a flue gets hot enough to move.

Every run needs one cleaning point per bend — plan for it now, because a sweep will insist on it later. Firebricks and baffles are wear parts — they are listed as spares and take ten minutes to change.

Specification

• Type: Anti-Downdraught Cowl
• Material: Stainless Steel
• Dimensions: 150–200 mm
• Diameter: turns downdraught into draw
• Weight: 3.26 kg

Care

Sweep once a season and check the clamp bands after the first winter — steel moves and bands loosen.