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Today's Hours 8am - 11pm estThe Napoleon Outside Air Kit – 111KT is designed to improve the efficiency and safety of wood-burning fireplaces and stoves by supplying combustion air from outside the home. This kit includes a 4-foot length of insulated 4" flexible venting and a through-wall vent, making installation simple and effective. By drawing air from outdoors, it helps reduce negative pressure in tightly sealed homes and enhances overall fireplace performance.