Restricted: This item is only approved for purchase by Business Accounts. For use with 2" or 3" vent systems. The vent kit must terminate outside the structure and can be installed with the intake and exhaust pipes located side-by side or with one pipe above the other. Vent kit is not for use with single pipe (indirect vent) installations. Flush-Mount Vent Kit, 2.9inH.x13.2in.W