Osburn Stoves by SB I 2200 - Manual (Page 11)

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1.5.3.4 Draft
Your Osburn stove will attain its best performance if installed with a chimney system that has
proper draft. (Draft is the force that moves air from the appliance up through the chimney and is
predominantly affected by the height and diameter of the chimney, and the stack temperatures of
the stove). If you test the draft using a pressure gauge, the reading should be between .05 - .07
inches of water column (w.c.) at a medium high fire. (See Table 2.2). Drafts of less than .03" w.c.
will cause operation difficulty while too much draft (greater than .10" w.c.) will result in over-
firing of the stove. This can result in excessive operating temperatures. If this is the case, a manual
damper may be installed in the vertical connector pipe to help reduce excessive draft.
Figure 1.4 Connection to a Masonry Chimney (Exterior Shown)
1.5.4 Typical Types of Chimney Systems
There are basically two types of chimney systems; one employs an existing masonry chimney,
while the other employs a manufactured or factory built chimney. In either system the chimney
may be of an interior or an exterior type. The following illustrations are provided to demonstrate
the basic components required for a proper and safe installation. The components identified may
not appear exactly as those purchased – the manufacturers’ installation instructions and specified
clearance distances should always be followed in accordance with local and national installation
codes. In Canada the CSA B365 and the CSA C22.1 installation codes are to be followed. In the
USA the ANSI NFPA 70 and ANSI NFPA 211 installation codes are to be followed.