Roof Down Slope Hole Size
SLOPE
ASHT+
*
/
*
/ DuraTech DTC
**
S-2100+
*
/
*
AC
*
Roof Pitch
6”
6”
6”
0 *
12-3/8” (314 mm)
14-1/8” (359 mm)
15” (380 mm)
2/12
12-9/16” (319 mm)
14-3/8” (365 mm)
15-3/8” (390 mm)
4/12
13” (330 mm)
14-7/8” (378 mm)
16-1/8” (410 mm)
6/12
13-7/8” (352 mm)
15-3/4” (400 mm)
16-7/8” (430 mm)
8/12
14-7/8” (378 mm)
17” (432 mm)
18-1/4” (465 mm)
10/12
16-1/8” (410 mm)
18-3/8” (467 mm)
19-5/8” (500 mm)
12/12
17-1/2” (445 mm)
20” (508 mm)
21-3/8” (545 mm)
*
Cross Slope Hole Size
Put the chimney cap into place.
Wash the roof fl ashing with a solvent or vinegar, then paint it with rust-proof paint.
Table 3
Figure 24
Figure 25
Minimum Chimney Height Using Elbows
Fireplace Model
MONTE
Chimney Model
ASHT+
*
/ S2100+
*
/
*
/
*
/ AC
*
/ DuraTech DTC
**
Vertical installation
12 feet (3.66 m)
Two (2) elbows
15 feet (4.57 m)
Four (4) elbows
17 feet (5.18 m)
Table 4
After reaching the location requiring the
elbow, proceed as follows:
ASHT+
*
/
*
/ S-2100+
*
/
*
/
DuraTech DTC
**
Chimneys
1. Install the fi rst elbow; turn it in the required
direction. Fasten it to the chimney with
the three (3) 1/2” (12 mm) metal screws
provided with the elbow.
2. Install the necessary chimney lengths to
achieve the required offset. Lock the chimney
lengths together: it is recommended to use
three (3) 1/2” (12 mm) screws. If the offset
length is made of two (2) chimney lengths or
more, use an offset or roof support halfway
up the offset. If penetrating a wall, install
a wall radiation shield (see
Figures 27 and
29
).
3. Use another elbow to turn the chimney
vertically. Secure the elbow, using three
(3) 1/2” (12 mm) screws (provided with the
elbow).
4. Use a plumb-bob to line up the center of
the hole. Cut a hole for the chimney in the
ceiling/fl oor. Frame this hole as described
previously (refer to section
Chimney Instal-
lation Instructions
).
5. From below, install a fi restop (See
Figure
22a
).
6. A support (ST
*
or SO
*
) must be used on
the fi rst 15’ section (5 m).
7. Continue with the regular installation.
AC Chimney
*
1. Install the fi rst elbow. Turn it in the required
direction. To lock it in place, turn 1/8 of a
turn. Fasten the straps attached to the elbow
to the surrounding frame, using nails or
drywall screws (see
Figure 27
).
2. Install the necessary chimney lengths to
achieve the required offset. Lock the chimney
lengths together. If penetrating a wall, use
a wall radiation shield.
3. Use another elbow to turn the chimney
vertically. Lock it to the chimney. Fasten
the straps attached to the elbow to the
surrounding framing using nails or drywall
screws.
4. Use a plumb-bob to line up the center of the
hole. Cut a hole for the chimney in the ceiling.
Frame this hole as described previously.
5. From below, install a fi restop (see
Figure
22c
).
6. Continue with the regular installation.
NOTE: When using AC
*
chimney, an AC6SB
*
starter section must be used before installing
an elbow. When an offset is needed imme-
diately off the top of the fi replace, an elbow
starter section, AC6SB30
*
, is available.
AC
*
Air Cooled Chimney
Collar
Chimney
Flashing
OFFSET CHIMNEY INSTALLATION
After reaching the location requiring the elbow, proceed as follows. The minimum chimney height
when using elbows is:
Spacer (built
into fl ashing)
NOTES:
•
Must return to vertical before penetrating ceiling or fl oor.
•
A maximum of 2 offsets are allowed.
*
Available from Security Chimneys™
**
Available from DuraVent
®
NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
15
