A:AnswerBelow is a link to the installation guide. The cutout dimensions needed are 5.38" W x 7.13" H for the larger top cutout, and 2.25" W x 3.75" H for the smaller bottom cutout. Hope this helps!
file:///C:/Users/zmilli1a/Documents/Chrome/IS-In-WallTVPowe-OQ%20(2).pdf
A:AnswerMy previous answer had a typo in it...this unit is between 3 and 3 1/2 inches deep. I do not think it would work with a wall less than 2x4 construction.
A:AnswerNot likely. You would have to be able to find a hollow space behind the brick through which you could pull the cables. The fireplace is probably solid masonry.
A:AnswerI did it but it was a pain with the insulation. Fishing the wire and HDMI cable down past the insulation can be difficult -- especially if the insulation is tight. If you're not sure, pay the bux to Best Buy. They have the right tools to do it. Good luck.