Lennox Hearth Brentwood SP - Manual (Page 18)

ANGLED WALL RADIATION SHIELD
(RSM+ and RSMI30)
When traversing a combustible wall with the chimney at a 30º or 45º
angle, an angled firestop or wall radiation shield must be installed. Only
one is required.
Note: 45º angle for Canada only ( RSMI45)
In cold climate locations (climates where temperatures will fall below 32°
F / 0° C), we recommend that you use the insulated wall radiation shield
since it will maintain the home’s thermal barrier.
RSM+ and RSMI30
(RSMI45 - Canada Only)
Chimney Model Angle Hole Size
ASHT / HT6103+ (6”
dia). Canada only
30º 283 mm x 781 mm (11-1/8” x 30-3/4”)
45º 283 mm x 518 mm (11-1/8” x 20-3/8”)
S-2100+ / HT6000+ /
AC (6” dia).
30º 327 mm x 881 mm (12-7/8” x 34-11/16”)
30º 380 mm x 972 mm (15” x 38-1/4”)
Table 5
Figure 24
Drywall
Insulated Wall
Insulated Wall
Radiation Shield
Figure 25 - Offset Chimney Installation
Figure 26
Insulated Wall
Radiation Shield
Support
Straps
ACRS
Chimney AC
Starter Section
Straps
Rain Cap
Collar
Roof Flashing
Offset Support
Framing
2” x 3”
Note: This illustration is not to scale. It represents how the chimney
must be supported. A 30 degree offset only is allowed in the USA
and a 45 degree maximum offset is allowed in Canada.
Note: In cold areas it is recommended to protect the
chimney in a insulated chase.
NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
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