Revolving Anti-Downdraught Cowls

Here at Brewer Cowls, we have a great range of revolving anti-downdraught chimney cowls.

How do revolving cowls work and help to prevent downdraught?

Globe type cowls, such as the Aspirotor, work when wind catches the fins, rotating the globe and preventing wind from entering the chimney. Lobster back chimney cowls rotate, turning the opening away from the wind direction, and Stealth chimney cowls are not just decorative, but use a vane and ball bearing system to rotate away from the wind.

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