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9 9
Chase Installations
A. Construct the Chase
A chase is a vertical boxlike structure built to enclose the
fireplace and/or its vent system. Vertical chimneys that
run on the outside of a building must be installed inside a
chase.
Construction of the chase may vary with the type of build-
ing. These instructions are not substitutes for the require-
ments of local building codes. Local building codes MUST
be checked.
For outside chase construction, insulation is not required.
Building codes require false ceiling and ceiling firestops at
each floor of the chase or every 10 ft (3.05 m) of clear
space to control spread of fire.
Gas line holes and other openings should be caulked with
high temperature caulk or stuffed with unfaced fiberglass
insulation.
Three examples of chase applications are shown in Fig-
ure 9.2.
Round Termination Cap
Metal Chase Top
Figure 9.1
Chase Assembly
Outdoor Lifestyles by Hearth & Home Technologies • ODVILLA Wood Owners/Install • 4072-345 Rev A • 08/22
Insulation in the
outside walls
of the chase
1. Fireplace and chimney enclosed in an exterior chase.
2. Chimney offset through exterior wall and enclosed in chase.
3. Chase constructed on roof.
1
Figure 9.2
Chase Constructions
WARNING! Risk of Fire! DO NOT seal area between fire
stop opening and chimney pipe except where they enter
the attic or leave the warm air envelope of the home (use
600° F sealant).
WARNING! Risk of Fire!
2 in. (51 mm) air space clearance to insulation and other
materials surrounding the chimney system.
•
Insulation and other materials must be firmly secured to
prevent accidental contact with chimney system.
•
The chase must be properly blocked to prevent blown
insulation or other combustibles from entering and
making contact with fireplace or chimney.
•
Failure to prevent contact between insulation or other
materials and chimney system may cause overheating
and fire.
2
You must maintain a minimum
3
29
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