Lennox Hearth MODEL MONTAGE 32FS - Manual (Page 12)

NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE
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Figure 11 - Manufactured Home Chimney Height Requirements
Chimney Height Requirements - Site Built Residential Home
The vent termination height required is - USA, 1-foot minimum; Canada
3-feet minimum above the roof penetration point as illustrated below (Ref.
USA - National Standard, NFPA 211 and Canada National Standard CSA
B365-01. Check with your local building official for additional require-
ments for your area.
Figure 10 - Site Built Residential Home Chimney Height Requirements
Termination Cap
Must Be Listed To
UL 641 or ULC S609
USA 1 Foot Minimum *
CANADA 3 Feet Minimum
Less than
10 Feet (3 m)
10 Feet
(3 m)
3 Feet (914 mm)
Minimum
2 Feet (610 mm) Min.
3 Feet
(914 mm)
Min.
m = meter
mm = millimeter
Requires A Listed Termination Cap *
Top Of Flue Must Be
3’ Higher Than High-
est Point Of Roof
Penetration
Top Of Flue Must Be ’
Higher Than Any Part Of
Roof Within 10’ Horizontal
Chimney Height Requirements - Manufactured Homes
The chimney must extend 3’ (.92m) above the level of roof penetration
and a minimum of 2’ (.61m) higher than any roof surface within 10’
(3m) (see below). Check with your local building officials for additional
requirements for your area.
To pass inspection in nearly any jurisdiction, the chimney must meet both
safety and exhaust flow requirements. The (3’ by) 2’ by 10’ rule applies
to both masonry and factory-built chimneys
* Ref. USA - National Standard, NFPA 211-latest edition and Canada
National Standard CSA B365-01-latest edition. Vents installed with a
listed cap shall terminate in accordance with the terms of the cap’s
listings.
Termination When Connected to Masonry Chimney or Existing
Class A Chimney
A flexible corrugated chimney liner has much greater resistance to the
flow of flue gases than does a rigid liner. For this reason we recommend
that a larger, 4” liner be used on vertical runs exceeding 15 feet or that
rigid venting be used . See Figure 12.
If a flexible corrugated chimney liner is used, it must be fully extended
to eliminate any sagging and to improve the exhaust flow.
Figure 12 - Existing Chimney Terminat ion
Listed Pellet Vent
Termination Cap
Chase Cover
1’ Section of PL Vent
(listed to UL 641 or
ULC S609)
3” or 4” liner
(listed to UL 1777
or ULC S635)
Termination When
Connected to Masonry
Chimney or Existing
Class A Chimney
Termination height is
measured above the
highest point where
it passes through the
roof surface.
*Min.  ft. clearance
is required to com-
bustibles (i.e. cedar
shake roof, etc.)