daydreamz I would also love to see a full layout of this design.

Birdseye Design 3/12

COASTROAD Hearth & Patio Since no one from Birdseye Design has responded yet, I might be able to help.

Looking a the other photos of the project, it appears that the interior fireplace is in a different part of the house.

Having said that, it is possible to do either back-to-back or even a see-through inside/outside fireplace.

We don't recommend the see-through type because of the different heating needs of the two sides. Imagine sitting out on the porch on a cool fall evening with the fire going for several hours to keep you warm. When it becomes late, you go back inside the house to find that the fireplace has made it uncomfortably warm inside the house. Since you have no control over how much heat goes to each side, it isn't a very practical solution. Two back-to-back fireplaces are better.