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Heatilator • Caliber Multi-Sided B-Vent • 4002-094 Rev H • 11/07
9
B. Construct 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 build-
ing. These instructions are not substitutes for the require-
ments 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 in
fi
ltration barriers should
be installed in the chase as per regional codes for the rest of
the home. Additionally, Hearth & Home Technologies recom-
mends that the inside surfaces be sheetrocked and taped
(or the use of an equivalent method) for maximum air tight-
ness.
To further prevent drafts, gas line holes and other openings
should be caulked with high temperature caulk or stuffed
with unfaced insulation. If the appliance is being installed
on a cement slab, we recommend that a layer of plywood
be placed underneath to prevent conducting cold up into the
room.
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.
• Do NOT place furniture or any other
combustible household objects within
36 in. of the appliance front.
WARNING
Fire Risk
• Construct chase to all clearance
speci
fi
cations in manual.
• Locate and install appliance to all
clearance speci
fi
cations in manual.
WARNING