Lennox BRENTWOOD, Installation Instructions Manual

Page: 27 / 34

25
4.3 OFFSET CHIMNEY INSTALLATON
The minimum chimney height when using elbows is:
Fireplace model BRENTWOOD
Chimney model AC
Vertical installation 12 ft. (3.66 m)
Two (2) elbows 15 ft. (4.57 m)
Four (4) elbows 17 ft. (5.18 m)
Table 3
After reaching the location requiring the elbow, proceed as follows:
AC Chimney
1. Install the first 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.
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 centre of the hole. Cut a hole for the chimney in the ceiling.
Frame this hole as described previously.
5. From below, install a firestop. (see figure 23).
6. Continue with the regular installation.
Figure 27