Minimume Installation Clearance For Sheet Metal Fireplace

The recommended minimum chimney height is 15 feet from the flue collar of the stove to the top of the chimney.

Minimume installation clearance for sheet metal fireplace.

When enclosing the chimney below the roof line a rafter radiation shield rrs must be installed at the roof level. Factory built fireplaces are a prefabricated sheet metal system that relies on clearances to combustibles to operate safely. 75 mm 3 in. Ul 103 type ht ul1738.

21 mm 7 8 in. Minimum installation clearances to com bustibles 50 mm 2 or as established by support assembly. Minimum space between shield and combustibles. All chimney enclosures must maintain the required minimum air space clearance of 2 50mm to the chimney.

The clearance reduction is usually measured from the rear of the stove to the original combustible wall not to the sheet metal. 450 mm 18 in. 75 mm 3 in. The local code may require more firestops based on the total footage so account for that in your plans.

Metal or asbestos millboard must be installed between the brick slate or stone and the floor. Minimum clearance along the top of shield at ceiling. Shield extension beyond each side of appliance. Install the chimney manufacturer s metal firestop in the center of the material.

For use in accordance with local building codes can1 b149 installation code for natural gas. There may be other factors to conform to code for clearances on the roof high wind high altitude etc that may make the minimumheight undesirable or a violation of building codes. Minimum clearance along the bottom of shield. Parts of the mantel assembly located along the sides of the fireplace opening which project more than 1 1 2 inches 38mm from the face of the fireplace shall have additional clearance equal to the projection extension beyond 1 1 2 inches.

Using a piece of 24 gauge sheet metal installed on spacers 1 from an existing wall and floor will reduce stove clearances by 66 or from 36 to 12. May also be installed with listed factory built fireplaces as specified in fireplace manufacturer s installation instructions and identified on the fireplace label. Regardless of the fuel type there are common design aspects of all factory built fireplaces that must be taken into consideration when planning a diy installation. 25 mm 1 in.

This includes connector pipe and chimney pipe. If the stove legs provide less than 6 inches of clearance 2 to 4 inches of hollow masonry laid to pro vide air circulation with a sheet of 24 gage sheet metal between the floor and the masonry is recommended.