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Heat & Glo • Cerona-36, Cerona-42 • 2106-900 Rev. F • 04/088
Fire Risk.
• Construct chase to all clearance specifi cations
in manual.
• Locate and install appliance to all clearance
specifi cations in manual.
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 re-
quired 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 out-
side walls of the home to prevent cold air drafting prob-
lems. 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 high temp caulk or stuffed with unfaced
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.
insulation. If the appliance is being installed on a cement
slab, a layer of plywood may be placed underneath to pre-
vent conducting cold up into the room.
A
B
C
D
F
G
H
J
I
E
WARNING
WARNING
CLEARANCES TO COMBUSTIBLES:
A BCD E F G H I J
Rough
Opening
(Vent Pipe)
Rough
Opening
(Height)
Rough
Opening
(Depth)
Rough
Opening
(Width)
Clearance to
Ceiling from Top
of Arch Opening
Combustible
Floor
Combustible
Flooring
Behind
Appliance
Sides of
Appliance
Front of
Appliance
Cerona-36
in
10 50-1/2 22-1/4 42-1/8 49 0 8 1/2 1/2 36
mm
254 1283 565 1070 1245 0 203 13 13 914
Cerona-42
in
10 54-1/2 22-1/4 49-1/8 45-1/4 0 8 1/2 1/2 36
mm
254 1384 565 1248 1149 0 203 13 13 914