DuraVent DuraChimney II - Manual (Page 6)

6
Table 1
Frame Opening Dimension Chart
Diameter Framing Dimension
10" 17" x 17"
12" 19" x 19"
14" 21" x 21"
16" 23" x 23"
pass through floors of buildings requiring
the protection of vertical openings shall be
enclosed with approved walls having a fire
resistance rating of not less than one hour
when such chimneys are located in a building
less than 4 stories in height, and not less than
2 hours when such chimneys are located in a
building more than 4 stories in height.”
In Canada, except in single-family and two-
family dwellings, chimneys which extend
through another story must have an enclosure
with a fire resistance rating equal to or greater
than that of the floor or roof assembly through
which they pass.
Cold Climates: In cold climates, chimneys
mounted on an outside wall should be
enclosed in a chase. Exterior chases reduce
condensation and creosote formation, and
enhance draft. Always maintain a 2” air-space
clearance to combustibles.
FIREPLACE RECOMMENDATIONS
Always follow the fireplace manufacturer’s
installation instructions.
Installation: Install your fireplace as described
by the fireplace manufacturer. Be sure to
maintain all required clearances.
Flues: Connect only one fireplace per chimney.
Operation: Follow the fireplace safety manual
for maximum efficiency and safety. Do not over
fire. Any damage to the fireplace or chimney can
possibly void your warranties.
Fuels: Do not burn driftwood, plastic, or
chemically treated wood such as railroad ties.
They are corrosive to your chimney system.
Follow the fireplace manufacturer’s instructions
regarding fuels.
MASONRy FIREPLACE
INSTALLATION
1. Place Fireplace: Position the fireplace
MASONRY
ANCHORS
HI-TEMP
SEALANT
ANCHOR PLATE
OR ANCHOR PLATE
WITH DAMPER
Figure 2
Figure 3
ANCHOR PLATE
WITH DAMPER NOTE: DAMPER PLATE
IS CLOSED WHEN
CHAIN IS HOOKED
ON LINTEL HOOK
LINTEL
HOOK