Our FB-ZC-S is specifically designed to fit into the most common 36˝ zero clearance fireplaces or smaller masonry fireplaces with a compact, molded design and an expansive height for your viewing area. Consisting of a patented ceramic fiber material with an extremely high insulation factor, the FireBrick© radiates more heat into a room than a metal fireplace insert can provide. With six realistic, oak-style logs and several fronts and finishes to choose from, our insert will match the beauty of any smaller-sized masonry or built-in fireplace.