Screwfit Anti Downdraught Chimney Liner Cowl | Solid Fuel

Screwfit Anti Downdraught Chimney Liner Cowl The screwfit anti downdraught chimney liner cowl is engineered to help stabilise flue performance on flexible stainless-steel liners used with wood-burning, coal and multifuel appliances. By dispersing wind turbulence around the terminal, it minimises smoke blow-back, helps maintain a steady draw and prevents rain, debris and birds from entering the flue. Its unique screwfit system ensures a strong mechanical connection without additional clamps or sealants, making installation quick and secure. If your stove or fire experiences inconsistent draught, periodic downdraught or small amounts of smoke entering the room during windy conditions, the screwfit anti downdraught chimney liner cowl offers a simple, reliable and long-lasting solution. Its aerodynamic hood design channels airflow upward, promoting positive flue pressure while ensuring continuous extraction of combustion gases. Helpful resources: Liner Cowls · Anti-Downdraught Cowls · Ultimate Guide · Chimney Cowls UK Blog · Hot Box Stoves Why choose this screwfit anti downdraught chimney liner cowl Effective downdraught reduction: Aerodynamic profile disperses wind to ensure stable flue draw. Screwfit connection: Eliminates the need for straps or adapters — simply twist and secure. Solid fuel compatible: Works with wood burners, multifuel stoves and open fire installations. All-weather performance: Prevents rain ingress and protects against birds and debris. Durable construction: Manufactured in coated steel or stainless steel (model dependent). For pots rather than liners, see our pot-hanging liner cowls. Technical specifications — screwfit anti downdraught chimney liner cowl Product type Anti-downdraught cowl for flexible liners Connection Screwfit liner spigot attachment Material Coated steel / stainless steel Fuel type Wood, coal, multifuel * Purpose Improve draw, reduce downdraught and smoke blow-back Weather resistance Designed for wind, rain and coastal exposure *Always check your stove and flue manufacturer instructions regarding terminal compatibility. Installation & compliance Confirm your liner size matches the screwfit anti downdraught chimney liner cowl. Insert the cowl’s spigot into the liner end and twist until firmly engaged. Ensure the seal is tight and the cowl is level on the terminal. Check there are no obstructions and the flue path is clear. Test the appliance to verify improvements in draw and stability. For UK regulations on chimney terminals, see Approved Document J. Related & helpful Liner Cowls Anti-Downdraught Cowls Stainless Steel Cowls Ultimate Guide to Chimney Cowls FAQs — screwfit anti downdraught chimney liner cowl Does this cowl stop all downdraught? It significantly reduces most wind-related downdraught issues, especially on exposed chimneys and problematic flues. Will the screwfit connection loosen over time? No. Once properly fitted, the screwfix-style attachment provides a secure mechanical bond. Is it suitable for gas flues? No — gas systems typically require terminals without mesh or restrictions. Consult your installer. How often should I clean the cowl? Solid fuel systems should be inspected regularly to avoid soot buildup on the cowl and liner connection. More from us: Liner Cowls · Blog · Anti-Downdraught Buy the Screwfit Anti Downdraught Chimney Liner Cowl Add to basket Price shown ex VAT. Fast UK delivery.