Abstract: An exhaust extraction rail assembly including a top rail with side rails connected thereto and extending downwardly therefrom with a pair of resilient sealing members extending inwardly from the bottom edges of the side rails to close off the space therebetween and thus form a central line of contact between the sealing members, an exhaust spout sealingly positioned in the central line of contact of the sealing member for longitudinal movement therealong, a carriage assembly supporting the exhaust spout and carrying wheels riding in a track channel on the bottom edge portion of each side rail member.