Lennox BRENTWOOD, Installation Instructions Manual

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4.5 CHIMNEY SUPPORT INSTALLATION
Universal Roof Support
This support has two possible uses:
1. It may be used on a floor, ceiling or roof above an offset to support the chimney
above the offset.
2. It may be used on a floor, ceiling or roof as a supplementary support
Table 6 gives maximum height of supported chimney.
NOTE: For the AC chimney, a support section may be used every 40 ft. (12 m) instead
of the universal roof support (ST).
For roof support installation, refer to the instructions provided with the support.
Universal Offset Support
This support is used to support the chimney above an offset. When the chimney offset is
used to traverse a wall this support may be used on the wall to support the chimney. The
maximum heights are given in Table 6. For offset support installation, refer to the
instructions provided with the support.
CHIMNEY MODEL MAXIMUM HEIGHT OF SUPPORTED CHIMNEY
OFFSET SUPPORT ROOF SUPPORT
AC (6" dia.) 40 ft. (12.19 m) 50 ft. (15.20 m)
Table 6
4.6 CHIMNEY CHASE AND MULTIPLE TERMINATIONS
For the purpose of this manual, a chimney chase is considered a part of the chimney
system rather than part of a building. The termination must be placed a minimum of 18"
(460 mm) above the chase.
For installations where more than one chimney is located in the same chase or within the
same area, we suggest that their terminations be separated by at least 16" (410 mm)
horizontally, and 18" (460 mm) vertically. This separation is to prevent smoke migrating
from one chimney to another (see figure 28).