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Place the fireplace in its final position. Install the exhaust piping at the top, or back, of stove. Cut the hole for the direct venting system. Frame the inside edges of the opening with lumber.
When you have found the spot in the room where you want to place the fireplace and placed the platform, set the fireplace on top of the platform. Make sure that it has the clearance it needs from any combustible materials and that its position looks good in the room. Attach as much as you can up to the section that goes through the wall. This will allow you to figure out where the hole through your wall should go exactly. You will begin by attaching a straight pipe to the starting collar on top of the fireplace using stove cement. Different fireplaces require different gaskets to completely attach the pipe to the collar. Be sure to follow manufacturer's instructions for this step. Once you are able to determine where the hole for the exhaust pipe will go, use a pencil to trace a circle around the pipe at the wall. Then move the fireplace platform and the fireplace out of the way so you can have easier access the wall when cutting the hole. This hole should be the size of the wall-pass-through that came with you ordered with your stove. The pass through is designed to keep all heat away from combustible wall materials, making it a very important part of keeping risk of fire damage at a minimum. Before just cutting all the way through your wall, make sure that there are no electrical lines or pipes in the area you are cutting out. Use a drywall saw to carefully cut a square hole around the tracing you made. Remove the drywall so that you can see into the wall, making sure all utilities are clear from the area. Drill a hole from the inside through the outside wall to show you where the corners are on the outside of the wall. If your wall-pass-through is square, it's easiest to drill a small hole at each corner. On the outside wall, use the appropriate tools based on your materials to complete the hole you started on the inside. The framing you insert will create a base on which the pass-through can be attached. Follow manufacturer's instructions when determining materials and size to make the finished hole.