Lennox Hearth Brentwood SP - Manual (Page 15)

CHIMNEY INSTALLATION INSTRUC-
TIONS
1. Cut and frame the holes in the ceiling, floor
and roof where the chimney will pass (see
Figure 18). 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 13) for the roof holes.
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 (Figures 19a
through 19d).
3. For ASHT / HT6103+ AND S2100+ / HT6000+
chimneys place the first chimney length on
the fireplace. To lock it in place, turn 1/4
of a turn clockwise. With the AC chimney,
you must use a starter section (AC6SB or
AC6SB30) before installing the first chim-
ney length (Figure 20). 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 (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 21 and 22).
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.
CHIMNEY MODEL SqUARE HOLE
SIZE OPENING
ASHT / HT6103+ 12-3/8” (314 mm)
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 19a
AC CHIMNEY INSTALLATION
(AIR COOLED GALVANIZED CHIMNEY)
Attic Radiation Shield
ASHT / S2100
HT6103+ / HT6000+
Solid Packed Pipe
AC
Air Cooled Pipe
Figure 19c
Figure 20
Figure 18 - Roof Framing
Rain Cap
Collar
Flashing
Attic Radiation
Shield
Firestop
Starter Section
Outside Combustion
Air Kit
Radiation Shield
Attic Radiation
Shield
Firestop
Figure 19b
Flashing
Attic Radiation
Shield
Roof
Mobile / Manufactured Home with Flat Roof
ASHT / S2100
HT6103+ / HT6000+
Mobile / Manufactured Home with Flat Roof
AC Chimney
Flashing
Attic Radiation
Shield
Figure 19d
Chimney Outside
Air Intake
(required when
using AC chimney)
15 NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.