M&G DuraVent DuraTech® Canada - Manual (Page 7)

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This support is designed to be used in rooms
with cathedral ceilings (no attic space between
the ceiling and the roof). If the support is used as
a regular floor support, follow the instructions for
the finish support DTC-FSC on page 5.
Step 1. Situate the chimney in a convenient location as near as possible
to the appliance outlet. Cut and frame a hole in the roof for the
support. The sides of this hole must be vertical (figure 7) (see
table 3 on page 3).
Step 2. From above, place the support in the opening. Lower it to a
convenient height.
Note: The cone portion of the support must extend below the
ceiling. The minimum horizontal distance between the single
wall stove pipe and the ceiling is 18".
Using a level, make sure the support is vertical. If the support
extends above the roof, cut it flush with the top of the roof. Nail
the support to the framed opening using (12)-3" spiral nails
(figure 8).
TO CONTINUE INSTALLATION SEE PREVIOUS STEP 3ON PAGE 5 .
INTERIOR INSTALLATION WITH CATHEDRAL CEILING
2
A - CATHEDRAL SUPPORT (DTC-RCSC)
B - SQUARE SUPPORT (DTC-CS) AND ADJUSTABLE
SQUARE SUPPORT (DTC-CSAS)
This support is similar in application and installation
as the cathedral support (DTC-CS). Install it using
the instructions above (refer to figure 9 for visual
references).
The adjustable square support requires an opening of 12"
x 12" up to 12" x 22-1/2" in the ceiling (see figure 10).
SUPPORT EXTENSION (DTC-PS) (For square support only)
Steep pitched cathedral ceilings may require the use of a
square support extension (DTC-PS). This piece fits down
inside the square support and can be adjusted to increase
the support's length by up to 16".
The extension is attached to the support using the eight
metal screws provided. Be sure there is at least a 2" overlap
where the extension joins the support.
HOLE SIZE
DOWN
B ROOF SLOPE
INCHES
SIDES OF HOLE MUST
BE VERTICAL
12 IN
ACROSS
SLOPE
A
Figure 7
Figure 8
Figure 9
CHIMNEY (DTC-_SS)
RAIN CAP (DTC-VC)
RAIN CAP (DTC-VC)
SILICONE
CAULKING
SILICONE
CAULKING
STORM COLLAR (DTC-SC)
STORM COLLAR (DTC-SC)
(12) - 3" SPIRAL
NAILS
CATHEDRAL
SUPPORT (DTC-RCSC)
FLASHING (DTC-F7)
MIN. HORIZONTAL
CLEARANCE 18" *
ROOF JOIST
SQUARE CATHEDRAL
SUPPORT (DTC-SS)
(12) 3" lg. SPIRAL NAILS
FLASHING
12" TO 22-1/2"
(4) x 3" lg SPIRAL NAIL
OR SCREW
3-1/2"
(MIN.)
(4) x 3" lg SPIRAL
NAIL OR SCREW
ADJUSTABLE ARM
PIPE CONNECTOR
(SINGLE WALL OR
DOUBLE WALL)
MIN. HORIZONTAL
CLEARANCE 18" *
* THAT DISTANCE CAN BE REDUCED IF A LISTED STOVE PIPE IS USED.
DTC-CS
DTC-PS
3-1/2" MIN.
Figure 10