Lennox Hearth Products Brentwood SP Installation & Operation Manual page 10

Insulated Chase Construction
Note: Floor and wall below the attic must be
insulated using the same insulation.
(2.1 m)
Figure 9
Facing
1. Combustible material must be installed flush
with the fireplace. It may not project in front
of and on the fireplace (i.e. the steel facade
of the fireplace) (Figure 10).
2. Non-combustible materials such as brick,
stone or ceramic tile may project in front of
and onto the fireplace facing (Figure 11).
Mantel
The mantel must be installed at least 45"
(1143 mm) above the base of the fireplace
(Figure 10).
10
Roof Support
Attic Radiation
Shield
Firestop
6' 8"
(2 m)
Min.
7'
Min.
1/2" Plywood
Mantel
45"
(1143mm)
Min.
Figure 10
NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
Insulate Joists
Same As Ceiling
Storm Collar
Flashing
Draft Stops
Floor
Ceiling
Firestop
Wall
CTDT
Termination
• Must have the same firestopping
Note: Non-
resistance as adjacent wall.
Combustible
• Must have the same insulation as Chase
Flashing
adjacent ceiling.
Must Be
Used To
• Follow local rules regarding framing
Cover
construction.
Chase
Opening
Drywall or Any Rigid
Material
Insulation
2 x 4
(Thermal Barrier)
1/2" Drywall
2" X 3" Min.
Spacer
Optional
Insulation
In Outside
Walls Of
Chase
8'
8'
(2.4 m)
Level
Level
Solid
Continuous
Surface
Non-Combustible Facing
1/2" Drywall
2" X 3" Min.
Spacer
Door
Figure 11
Outside
Base