Sure Heat VFLB42B Surefire Vent-Free Low Profile Firebox with Screen, 42", Black No chimney; no venting; no chase. Saves installation time and expense 99.9% Energy efficiency. Saves on high energy costs while delivering maximum heat output Heat deflecting mantel guard protects mantels. Minimal clearance to floor and walls provide great design flexibility. All Sure Heat Vent Free Gas Logs can be installed in the Savannah Series Universal Vent Free Firebox Low profile hearth 1.5" From floor level provides great design flexibility Allows finishing with non-combustible material (marble, granite, stone, brick, tile, or slate)