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Self adjusting chimney cowl is designed to support gravitational exhaust ventilation and draft in flue, smoke and ventilation chimneys. Using a high-quality ball bearing guarantees long, maintenance-free use and significantly extends the service life of the chimney cowl. Regardless of the direction and strength of the wind, the base always sets with its direction, thereby covering the chimney opening.The chimney cowl is an ideal solution when there is no stabilized chimney draft or it is too small, and with unfavorable terrain configuration, strong and frequent winds.