DuraVent DuraPlus HTC - Manual (Page 5)

5
INSTALLATION NOTES
Proper planning for your DuraPlus HTC
Chimney installation will result in greater
safety, efficiency, and convenience, as well
as saving time and money. You must use
only authorized DuraPlus HTC Chimney parts
to maintain a listed Chimney system (not
including the connector pipe). Do not mix
parts or try to match with other products,
or use improvised solutions. Do not install
damaged or modified parts. Table 1 lists
the authorized DuraPlus HTC Chimney
components. Keep electrical wiring and
insulation away from all chimneys and
stovepipes. If you have any questions, be
sure to contact either your dealer or M&G
DuraVent directly.
Follow the appliance manufacturer’s
instructions to determine chimney diameter
and clearances between combustible
materials and your heating appliance. Never
choose a chimney with an inside diameter
smaller than your appliance’s outlet unless
allowed by local code or specified by your
appliance manufacturer. To calculate the
chimney’s outside diameter, add 4 inches
(100 mm) to the inside diameter.
CHIMNEY HEIGHT
The National Building Code of Canada states:
“1) A chimney flue shall extend not less than
a) 900 mm (3 feet) above the highest point at
which the chimney comes in contact with the
roof, and b) 600 mm (2 feet) above the highest
roof surface or structure within 3 m (10 feet)
of the chimney.” In the US, the National Fire
Protection Association Standard #211 states:
Chimneys shall extend at least three feet
above the highest point where it passes
through the roof of a building, and at least
two feet higher than any portion of a building
within ten feet.” (Fig 1) DuraPlus HTC chimney
can be installed up to 40-feet (12.2 m) when
using a Ceiling Support or single Tee Support.
If using two Tee Supports, DuraPlus HTC
chimney can be installed up to 80-feet (24.4
2 ft (600mm) MINIMUM
ABOVE HIGHEST POINT OF
ROOF WITHIN 10 ft (3m)
3 ft (900 mm)
MINIMUM
ABOVE ROOF
10 ft
(3m)
Figure 1
Figure 2
m). If using a Roof Support, a maximum of 30-
feet (9.1 m)of chimney can be installed. If the
chimney extends more than 4 feet above the
roof, an Extended Roof Bracket must be used.
Due to the overlap of the joints, subtract 1-1/2
ATTIC SPACE
OCCUPIED
SECOND
FLOOR
FIRST FLOOR
SUPPORT BOx
ENCLOSURE
MUST HAVE
2-INCHES (50mm)
OF CLEARANCE
BETWEEN
CHIMNEY
AND WALL
FIRESTOP
RADIATION
SHIELD
ATTIC
INSULATION
COLLAR