Sure Heat Mfg. VFBC42B Vent Free Firebox, 42" NG or LP, Black No chimney; no venting; no chase. Saves installation time and expense 99.9Percent energy efficiency. Saves on high energy costs while delivering maximum heat output Heat deflecting mantel guard protects mantels Easy to install; goes where other fireplaces can't go Optional traditional herringbone firebrick if desired but not needed (not included)