The products in this Chimney Plugs section are simple, but the effects for a homeowner can be really important. When you pass your venting installation through a combustible wall, there's a really good chance that you're required by code to use a wall thimble for that pass-through. If your venting setup changes or if you get a new heating appliance, you may be left with a hole in your wall where the vent pipe used to be. That hole can decrease your energy efficiency, leave potentially dangerous materials or edges exposed, and can generally be an eyesore. You can eliminate those problems and get your home back in tip-top shape with the simple addition of the appropriate Chimney Plug for your home.