Up To Date 50+ How To Build A Firebox For A Ventless Fireplace
Up To Date 50+ How To Build A Firebox For A Ventless Fireplace. A ventless fireplace fits anywhere in the house with no special renovations. Ventless fireplaces consist of a fire box with burners and a mantel. Units come in hundreds of descriptions from antique styles to custom designs. Unvented gas fireplaces have to meet a standard, ansi z21.11, so it is unlikely that you will be able to build an unvented fireplace that will.