Abstract: A device for drawing dilution air into a flue pipe extending from a furnace toward a chimney is disclosed. The device comprises first and second members. The first member includes an inlet and an outlet. The inlet is connectable to a furnace side of the flue pipe to receive flue gas therefrom. The outlet of the first member discharges the flue gas out of the first member. The second member include a body, a base, an outlet, a mixing chamber, and at least one louver. The base extends from the body toward the first member and has an opening fitted around the first member so that the outlet of the first member is positioned within the body of the second member and a flow passage is formed between the first member and the body of the second member. The outlet of the second member is connectable to a chimney side of the flue pipe. The mixing chamber receives the flue gas discharged from the outlet of the first member and the dilution air from the louver(s).