Williams 9901

All top-vent wall furnaces are designed to be vented through the roof with 4" oval double-wall metal pipe to maintain clearances in the limited stud wall space. This kit makes converting to round vent simple and easy. Kit includes: (1) Hold Down Plate, (1) Oval-to-Round Adaptor, (2) Ceiling Plate Spacers, and (2) 4" Oval Pipe