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A low cost prefabricated fireplace is provided with an open-ended fireplace box which requires no outer sheet metal shroud or housing as employed in the prior art sheet metal fireplaces. The novel fireplace box has at least five walls which consist substantially of insulating reinforced ceramic fibe

A low cost prefabricated fireplace is provided with an open-ended fireplace box which requires no outer sheet metal shroud or housing as employed in the prior art sheet metal fireplaces. The novel fireplace box has at least five walls which consist substantially of insulating reinforced ceramic fiber (RCF) material and a binder. A modular burner system is removably mounted on the bottom wall of the fireplace box and a floor panel is mounted on the modular burner system forming an air chamber below the floor panel in the fireplace box. A decorative surround trim is attached to the open end of the fireplace box which serves to support fixed or operable glass doors. A log set which may include a log burner is mounted above the floor panel which supports a decorative log set. Apertures are made in the sides or top of the fireplace box to accommodate an air supply and/or an exhaust stack. The fireplace box serves as a base unit to which other fireplace components are attached, connected or supported so that the need for conventional sheet metal is substantially eliminated. The resulting fireplace can be completed in many different configurations using a common fireplace box which needs no additional surrounding insulation for installation in a room.

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[ What is claimed is:] [1.] A low cost decorative prefabricated fireplace without a housing for installation inside individual room spaces to be heated, comprising:a non-porous one piece open fireplace box,said fireplace box comprising a high temperature fiber insulating material comprising a reinfo

[ What is claimed is:] [1.] A low cost decorative prefabricated fireplace without a housing for installation inside individual room spaces to be heated, comprising:a non-porous one piece open fireplace box,said fireplace box comprising a high temperature fiber insulating material comprising a reinforced ceramic fiber (RCF) and a non-organic binder,said fireplace box having at least five walls of interconnected homogenous said (RCF) material and a binder,said fireplace box having a top wall, a bottom wall, a rear wall and side walls,a removable floor panel mounted inside said fireplace box and spaced apart from said bottom wall forming an air chamber for combustion air below said floor panel and a combustion space above,a decorative log set mounted above said floor panel,burner means comprising a burner mounted below said log set at said floor panel,tubular exhaust stack means mounted on and extending through an aperture in one said fireplace box wall and coupled to the combustion space in the fireplace box, anddecorative surround trim means mounted on the exposed edges of the fireplace walls which form said open fireplace box for providing a prefabricated fireplace without the need for separate outer housings.