The UK's bestselling static anti-downdraught cowl perfect for use with chimneys with excessive smoke issues. The cowl is fully assembled with stainless steel hook bolts and wing nuts, attaching the hood easily to the chimney pot. The chimney hood is still effective when the wind blows from any direction, while also stopping intrusion from rain or unwanted pests. The Cowl will fit all flues and has a 125-250mm internal diameter. Suitable for all fuels and is thoroughly tested under BSEN1856-2003-1.