Masonry Fireplace Firebox Dimensions

Model building codes also require that the hearth extend a minimum of 8 in.

Masonry fireplace firebox dimensions. Traditional style firebox with angled back wall straight back wall option also available. 30 36 42 and 48. Prefabricated fireplaces factory built or prefabricated fireplaces are relative newcomers to the fireplace scene. Fireplace design details checklist sides of firebox must pinch in towards back back wall of fireplace must be straight up for first 12 inches back wall must slope towards front for remainder of height width and height of opening must come from table below smoke shelf up above fireplace must be sized.

Brickwork should be strong enough to hold any decorative stone or other materials used on the exterior of the fireplace. To provide adequate draft and safe venting of combustion products the chimney flue for a fireplace has to be adequate in size or cross sectional area. Details are provided in technical notes 19a while proper chimney construction is outlined in technical notes. Unlike traditional masonry fireplaces most factory built fireplaces are metal and come from the factory as complete units with a firebox a specific chimney system and all miscellaneous parts.

Hearth may be a reinforced brick masonry cantilever. The technical notes address all the necessary features in a brick fireplace and their relationship to one another. In each direction to mark the 42 in. 3870 to 38 700 mm2 depending on the other components in the exterior air supply system.

Then he draws a centerline and measures out 21 in. The firebox of a concrete or masonry fireplace shall have a minimum depth of 20 inches 508 mm. Typical firebox assembly. If the fireplace opening is greater than 6 ft.

Oversized models available in 60 and 72 openings with dual chimney systems. Fireplace flue size specifications relation of fireplace size to flue opening dimensions table of required chimney flue size and flue dimensions for masonry fireplaces. This article series provides information about masonry fireplaces. Single face fireplace dimensions including the firebox depth width and height along with the proportionate flue size are given in technical notes 19.

The air inlet damper assembly area as shown in fig. 2 generally ranges from 6 to 60 sq in. The throat opening shall not be less than 4 inches 102 mm deep. The size of fireplaces will vary but masonry fireboxes should be at least four inches thick and 20 inches deep.

He draws a line along the back to establish the 20 in. The throat shall not be less than 8 inches 203 mm above the fireplace opening. 400 mm in front of the fireplace opening. Our conventional model is compatible with either masonry chimneys or ul 103 metal chimney systems.

Thus the best performance is generally achieved when the inlet is located near the front of the fireplace within the combustion chamber.