Does the Windkat Cowl work in low wind and still weather?

Yes, the Windkat continues to work even in extremely still conditions with no wind long after spinning cowls have stopped and become a hindrance rather than a help. The Windkat has extremely low resistance and as there is always some air movement even when the weather appears absolutely still, the Windkat will continue to channel that slight air movement upwards, which in turn draws air up the flue. No other cowl works as effectively.