

Close the outside-air duct when the fire is out. This register drops inline into the 5" fresh air intake pipe of an Osburn wood stove, insert or fireplace and puts an airtight damper on a wall knob: open while the appliance runs, closed when it is cold so no outdoor air leaks into an airtight house. It is made for the Osburn 950, 1700, 2000, Inspire 2000, Matrix and 3500 stoves, the Matrix 1900, 1700, 2000, Inspire 2000-I and Matrix inserts, the Horizon fireplace and the Gusto cookstove. The kit is the damper pipe with cable and mechanism, the wall plate, indicator and knob, and the screws; the insulated 5" pipe and the clamps are sold separately. $285.