The manufacturer’s installation instructions must be followed precisely. Always maintain the proper clearance to combustibles as established by the pipe manufacturer. This clearance is usually a minimum of 2”, although it may vary by manufacturer or for certain chimney components.
Chimney Height
Whether a masonry chimney or prefabricated metal chimney is used it must be the required height above the roof line.
The requirement is:
The chimney must be at least 3 feet higher than the highest point where it passes through the roof and at least 2 feet higher than the highest part of the roof or structure that is within 10 feet of the chimney, measured horizontally. See figure 2.
FIGURE2
Chimneys shorter than 14 feet may not provide adequate draft. This could result is smoke spilling into the room from the stove when loading the stove, or when the door is open. In addition, inadequate draft can cause back puffing, which is a build up of gases inside the firebox.
Other times, chimney height can create excessive draft which can cause high stove temperatures and short burn times. Excessive drafts can be corrected by installing a butterfly damper.If you suspect you have a draft problem, consult your dealer.
WALL PASS-THROUGHS
When your installation unavoidably requires the chimney connector to pass through a combustible wall to reach the chimney, always consult your local building officials, and be sure any materials to be used have been tested and listed for wall
In the U.S.
The National Fire ProtectionAssociation’s publication, NFPA 211, Standard for Chimneys, Fireplaces, Vents and Solid Fuel Burning Appliances permits four methods for passing through a combustible wall. Before proceeding with any method be sure to consult with your local building officials to discuss any local code requirements.
Common Method
When passing through a combustible wall to a masonry chimney this method requires the removal of all combustible materials from at least 12” around the chimney connectors proposed location. With a 6” round liner the minimum area required would be 31” x 31” square.
The space is then filled with at least 12” of brick around a fireclay liner. Remember, the liner must be ASTM C35 or equivalent, with a minimum wall thickness of 5/8”.
It is important to remember to locate the
It will be necessary to cut wall studs, install headers, and construct a sill frame to maintain the proper dimensions and to support the weight of the brick.
The bricks must be solid brick with a minimum of 3 ½ “ thick (4” nominal).
Refractory mortar must be used at the junction of the chimney and the
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