*PLUMBERSSTOCK EXPERT* responded:
Hi, there! Unfortunately, this Vermont Castings 1897 Outside Air Adaptor is designed only for Aspen Woodburning Stove Model 1920. For Aspen II Multi-Fuel Heater, you will need the outside air adapter kit #33258. Please check the 4th page of this Aspen II Installation and Operating Maual for reference. We don't have the Vermont Castings Outside Air Adapter Kit #33258 currently on the site, but there is a chance that we might be able to order it for you. Please contact one of our customer service representatives at 435-868-4020 between 8:00 AM and 7:00 PM MT or through e-mail at firstname.lastname@example.org and they will be happy to assist you. Thank you for visiting PlumbersStock.com! Have a good day!