Napoleon has designed a venting firestop to make your installation process much easier. The napoleon venting firestop is completely compatible with the dream gas fireplace. With this simple piece you can vent the smoke from your firestop in just a few hours. When you have the dream gas fireplace installed, attach the venting firestop by following the enclosed directions. The napoleon venting firestop will allow your gas fire to burn while keeping your home and family safe from the smoke. Weight 3 lbs.