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Hearth & Home Technologies, Inc. • Bravo, Aztec • InD • 703-900 Rev. N • 8/06 7
Fire Risk.
• Construct chase to all clearance
specifi cations in manual.
• Locate and install appliance to all
clearance specifi cations in manual
WARNING
B. Constructing the Appliance Chase
A chase is a vertical boxlike structure built to enclose the
gas appliance and/or its vent system. Vertical vents that run
on the outside of a building may be, but are not required to
be, installed inside a chase.
Construction of the chase may vary with the type of building.
These instructions are not substitutes for the requirements
of local building codes. Local building codes MUST be
checked.
Chases should be constructed in the manner of all outside
walls of the home to prevent cold air drafting problems.
The chase should not break the outside building envelope
in any manner.
Walls, ceiling, base plate and cantilever fl oor of the chase
should be insulated. Vapor and air infi ltration barriers should
be installed in the chase as per regional codes for the rest of
the home. Additionally, in regions where cold air infi ltration
may be an issue, the inside surfaces may be sheetrocked
and taped for maximum air tightness.
To further prevent drafts, the wall shield and ceiling fi restops
should be caulked with high temperature caulk to seal gaps.
Gas line holes and other openings should be caulked with
C. Clearances
Figure 3.2 Clearances to Combustibles
Fire Risk.
Odor Risk.
• Install appliance on hard metal or wood
surfaces extending full width and depth of
appliance.
• Do NOT install appliance directly on
carpeting, vinyl, tile or any combustible
material other than wood.
WARNING
high temp caulk or stuffed with unfaced insulation. If the
appliance is being installed on a cement slab, a layer of
plywood may be placed underneath to prevent conducting
cold up into the room.
C
B
D
A
*
*For additional framing options and dimensions, see Section 11, Finishing.
Clearance to Combustibles
A B C* D E F G H IJ
Rough
Opening
(Vent Pipe)
Rough
Opening
(Height)
Rough
Opening
(Depth)
Rough
Opening
(Width)
Clearance
to Ceiling
Non-Combustible
Floor
Combustible
Flooring
Behind
Appliance
Sides of
Appliance
Front of
Appliance
Inches 10 44 25-1/4 35-3/8 34-7/8 0 0 1/2 1/2 36
Millimeters 25 1118 641 699 886 0 0 13 13 914
FROM
TOP OF
FINISHING
STRIP TO
CEILING
H
E
G
I
F
J