Why this ducting earns its place
Extraction ductwork that passes through the roof or external wall needs proper sealing—and it's an easy detail to get wrong. The Combisteel Storm Collar Ø 200 mm is the right solution for smaller commercial kitchens, cafés, and compact preparation areas. It forms a tight seal where the duct exits the building, stopping cold draughts, wind-driven rain, and the insect infiltration that can block filters and reduce extraction efficiency.
Built from galvanised steel, this collar resists both kitchen humidity and external weather. The 200 mm diameter suits compact hoods and smaller ventilation systems—those used in sandwich shops, small restaurant kitchens, prep rooms, or catering vehicles. Installation is straightforward: position it over the ductwork where it breaches the roof or wall, secure it with stainless fasteners, and seal the gaps with high-temperature silicone and roofing cement.
Fitting a storm collar is a code-compliant best practice on new builds and an effective retrofit on older systems where you've noticed draughts or weather-related extraction problems. It's a small investment that protects your equipment and keeps your kitchen comfortable.
