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CHIMNEY INSTALLATION
INSTRUCTIONS
1. Cut and frame the holes in the ceiling, floor
and roof where the chimney will pass (see
Figure 31). Use a plumb-bob to line up the
center of the holes. The sizes are indicated
in Table 2 for the floor and ceiling holes and
Table 3 (Page 22) for the roof holes.
CHIMNEY MODEL *
SQUARE HOLE
6"
SIZE OPENING
ASHT+ / HT6103+ *
12-3/8" (314 mm)
DuraTech /
12-3/8" (314 mm)
DuraTech DTC **
S-2100+ / HT6000+ *
14-1/8" (359 mm)
AC *
15 in (380 mm)
NOTE: See Table 3 for Sloped Roof Framing
Table 2 - Flat Roof Framing
Figure 31 - Roof Framing
2. From below, install a firestop in each ceiling/
floor separation through which the chimney
will pass. At the attic level, install an attic
radiation shield from above (Figure 32a).
3. For ASHT+
/ HT6103+
/ DuraTech DTC
*
*
and S2100+
/ HT6000+
chimneys place
*
*
the first chimney length on the fireplace.
Secure it to the collar with four screws equally
spaced around the perimeter. With the AC
chimney, you must use a starter section
before installing the first chimney length
(Figure 33). Continue installing chimney
lengths making sure to lock each length in
place.
4. Every time the chimney passes through
a ceiling or a wall, install the appropriate
firestop. When you reach the desired height,
install the roof support. When installing a
support, slightly lift the chimney system so
the weight will lie on the support, not on the
fireplace to reduce expansion noises (Refer
to instructions included with the support).
5. Then, put the roof flashing in place and seal
the joint between the roof and the flashing
with roofing pitch (see Figures 34 and 35).
For sloping roofs, place the flashing under
the upper shingles and on top of the lower
shingles. Nail the flashing to the roof, using
roofing nails.
6. Place the spacers and the storm collar over the
flashing, and tighten it with the bolt supplied.
Finally, seal the joint between the storm collar
and the chimney, using silicone caulking.
7. Install the chimney cap. Once the chimney
cap is in place, the roof flashing can be
washed with a solvent or vinegar and then
painted with rust-proof paint.
Attic Radiation Shield
ASHT / S2100
HT6103+ / HT6000+
Solid Packed Pipe *
Figure 32a
AC CHIMNEY
INSTALLATION
*
(AIR COOLED GALVANIZED CHIMNEY)
**
Chimney Outside
Air Intake
(required when
using AC chimney)
Outside Combustion
Air Kit (included
with fireplace)
Figure 33
AC
Air Cooled Pipe *
Firestop
Figure 32b
Rain Cap
Collar
Flashing
u
u
Combustibles are not allowed below
top spacers above the fireplace. Facing in
front of fireplace must be non-combustible
below this area.
Attic Radiation
Shield
Radiation Shield
Attic Radiation
Shield
Firestop
Universal Support
AC Starter Section
Available from Security Chimneys
*
**
Available from DuraVent
®
21
®
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