Anti down draught

The purpose of an anti-down draught chimney cowl is to eliminate downdraught. All the models offered use aerodynamic principles to create lift at the top of the chimney as air moves over it. This effect cures downdraught and shifts residual fumes. In other words, by putting one of Colt Cowls anti-downdraught cowls on your chimney, you will stop having a smokey fireplace or stove!

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