First, we’ll use heavy-duty Tapcon concrete screws to secure 2x4s to the produced stone. Then, using the hammer drill, drill them into the stone, which was surprisingly easy. If possible, buy a few additional bits to make it simpler for the later. Use some ducting materials which come in two divisions, cut out square divisions from it with an angle grinder and place the sheet metal screws.

Silky Terrier Dog Breed Playing Aro... Silky Terrier Dog Breed Playing Around

The ducting was divided into two sections, which were then bonded together and around the vent with duct tape to keep it as airtight as feasible. We were able to divert the majority of the heat away from the TV and out the sides of our bump out using this simple trick.

We need to construct two side panels out of 3/4′′ plywood to match the ducting, using a band saw to carve out holes for the venting. The panels were protected with the sided 2x4s and also heavy tapcon screws. Screw it only to the stone or just to the 24, but for this thing, we require a lot of anchor points and it needs to be overbuilt for strength. Furthermore, the bump-out was only attached to the 2x4s during the first assembly, which made repositioning easier, and we only screwed into the stone after we were completely committed.

The screws that go in the side of the bump-out, rather than the front, are stronger because they must shear (break), whereas those that go in the front might potentially be dragged out by the weight of the television. To complete the side panels, grab two matte black floor vents simply remove the cover and the “guts.” Drill two holes in the side panels of the bump-out to install the vents, and they’ll blend right in.

This is how the bump-out is framed into the fireplace.