Knockdown ventless shallow sheetmetal fireplace firebox

Abstract

In accordance with the present invention a knockdown ventless sheetmetal fireplace firebox that is simple and inexpensive to manufacture, easy to assemble, and is less than 10″ in exterior depth.

1 . A knockdown, ventless, shallow, fireplace firebox comprising of five pieces of sheetmetal, a top piece, a bottom piece, a left piece, a right piece and a back piece, where the exterior depth of the assembled unit is under 10″. 
   
   
       2 . A knockdown, ventless, shallow, fireplace firebox according to  claim 1  wherein the five pieces of sheetmetal are held together by eight screws. 
   
   
       3 . A knockdown, ventless, shallow, fireplace firebox comprising of four pieces of sheetmetal, a top piece, a bottom piece, a left piece and a right piece, where the exterior depth of the assembled unit is under 10″. 
   
   
       4 . A knockdown, ventless, shallow, fireplace firebox according to  claim 3  wherein the five pieces of sheetmetal are held together by eight screws. 
   
   
       5 . A knockdown, ventless, shallow, fireplace firebox according to  claim 1  wherein the left and right pieces are identical and the top and bottom pieces are identical. 
   
   
       6 . A knockdown, ventless, shallow, fireplace firebox according to  claim 5  wherein the five pieces of sheetmetal are held together by eight screws. 
   
   
       7 . A knockdown, ventless, shallow, fireplace firebox according to  claim 3  wherein the left and right pieces are identical and the top and bottom pieces are identical. 
   
   
       8 . A knockdown, ventless, shallow, fireplace firebox according to  claim 7  wherein the four pieces of sheetmetal are held together by eight screws. 
   
   
       9 . A knockdown, ventless, shallow, fireplace firebox according to  claim 1  wherein insulation is attached to the exterior of the left, right, top and back of the invention. 
   
   
       10 . A knockdown, ventless, shallow, fireplace firebox according to  claim 2  wherein insulation is attached to the exterior of the left, right, top and back of the invention. 
   
   
       11 . A knockdown, ventless, shallow, fireplace firebox according to  claim 3  wherein insulation is attached to the exterior of the left, right, top and back of the invention. 
   
   
       12 . A knockdown, ventless, shallow, fireplace firebox according to  claim 4  wherein insulation is attached to the exterior of the left, right, top and back of the invention. 
   
   
       13 . A knockdown, ventless, shallow, fireplace firebox according to  claim 5  wherein insulation is attached to the exterior of the left, right, top and back of the invention. 
   
   
       14 . A knockdown, ventless, shallow, fireplace firebox according to  claim 6  wherein insulation is attached to the exterior of the left, right, top and back of the invention. 
   
   
       15 . A knockdown, ventless, shallow, fireplace firebox according to  claim 7  wherein insulation is attached to the exterior of the left, right, top and back of the invention. 
   
   
       16 . A knockdown, ventless, shallow, fireplace firebox according to  claim 8  wherein insulation is attached to the exterior of the left, right, top and back of the invention.