Lennox Hearth 1900HT-M - Manual (Page 9)

INSTALLATION
PAGE 9
ACCEPTABLE CONNECTOR PIPE FOR INSTALLA-
TIONS
For Standard Residential Clearances: Six (6) inch
minimum, single wall, minimum MSG black or 25 MSG
blued steel connector pipe with listed factory-built chim-
ney suitable for use with solid fuels or masonry. Three
(3) pre-drilled holes are provided in the flue collar for
fastening the pipe securely to the stove. Use sheet
metal screws to do this. Additional sections of single
wall pipe should be fastened together with at least three
(3) sheet metal screws each section. When connecting
to the factory built ceiling support package, use the
manufacturer's transition piece, usually called a dripless
connector, to join single wall pipe to their factory built
chimney section.
Minimum Flue Size - The required minimum diameter
and area required for the flue size is (respectively) 6
inches / 152 mm diameter, which is approximately 28
square inches / 711 square mm. The maximum flue
size should be no more than (3) three times the cross
sectional area of the size of the 6 inches / 152 mm di-
ameter flue collar. In this case, that would be no larger
than a 10 inch (254 mm) diameter (area = approx. 85
sq. inches [216 sq. cm]).
Connection To A Factory Built Chimney - This space
heater is to be connected to a factory-built chimney
conforming to CAN / ULC – S629, Standard for 650
°C
Factory-Built Chimneys.
For Reduced Residential Clearances: Type L and
listed double wall connector pipe is acceptable. Install
any factory built brand of pipe according to the manu-
facturer's instructions.
Vapor Barrier at Chimney Penetration
Install all venting components per the Vent Manufactur-
ers installation instructions. Ensure that there is an ef-
fective vapor barrier at the location where the chimney
penetrates to the exterior of the structure. This can be
accomplished by applying a non-hardening waterproof
sealant to the following components:
• Around the chimney at the point where the storm
collar will meet the chimney just above the Flash-
ing.
• Along the vertical seam of the chimney pipe, where
it is exposed to the weather.
• On each nail head on the flashing.
• Around the chimney at the point where the storm
collar will meet the chimney just above the flashing.
Notes:
• On a flat or tarred and graveled roofs, nail and seal
the flat roof flashing to the roof on all sides with
roofing compound.
• Do not put screws through the flashing into the
chimney pipe.
CHIMNEY INSPECTION
Existing chimneys must be inspected before installing
your stove. Consult your local building department for
chimney code requirements. A masonry chimney must
have a code approved liner. This liner must not have
broken or missing pieces. Some non-code masonry
chimneys may be brought up to code by being relined.
(Consult your dealer or qualified chimney sweep). Fac-
tory built chimneys should also be inspected, first for
creosote deposits (which should be removed), and then
for integrity of the stainless steel liner.
Look for obvious bulges in the lining which may indicate
the need to replace that section (use a bright flashlight).
Also, inspect the attic to see that the chimney has
proper clearance to combustible framing members. For
interior masonry chimneys and most factory built chim-
neys, this must be a (2) two inch air space clearance,
which must not be filled with insulation or any other ma-
terial. An exterior masonry chimney must have a (1)
one-inch air space clearance.