Hearth and Home Technologies Hearth&Home Fireplace BV4236DBI - Manual (Page 21)

21 Hearth & Home Technologies • BV4236DBI, BV4842DBI • 2209-900 Rev. N • 9/12
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B
D
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B. Constructing the Appliance Chase
A chase is a vertical box-like structure built to enclose the
gas appliance and/or its vent system. In cooler climates
the vent should enclosed inside the chase.
NOTICE: Treatment of ceiling firestops and wall shield
firestops and construction of the chase may vary with the
type of building. These instructions are not substitutes
for the requirements of local building codes. Therefore,
you MUST check local building codes to determine the
requirements to these steps.
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.
Figure 5.2 Clearances to Combustibles
Walls, ceiling, base plate and cantilever floor of the chase
should be insulated. Vapor and air infiltration barriers
should be installed in the chase as per regional codes for
the rest of the home. Additionally, in regions where cold
air infiltration 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 fire-
stops should be caulked with caulk with a minimum of
300ºF continuous exposure rating to seal gaps. Gas line
holes and other openings should be caulked with caulk
with a minimum of 300ºF continuous exposure rating or
stuffed with unfaced insulation. If the appliance is being
installed on a cement surface, a layer of plywood may be
placed underneath to prevent conducting cold up into the
room.
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* Adjust framing dimensions for interior sheathing (such as sheetrock)
* MINIMUM FRAMING DIMENSIONS
A B C D E F G H I J
Rough
Opening
(Vent Pipe)
Rough
Opening
(Height)
Rough
Opening
(Depth)
Rough
Opening
(Width)
Clearance
to Ceiling
Combustible
Floor
Combustible
Flooring
Behind
Appli-
ance
Sides of
Appliance
Front of
Appliance
BV4236DBI
in.
Per Vent
Manufacturer’s
Instructions
40-1/8 22 42 25 0 0 1/2 1/2 36
mm 1019 559 1067 635 0 0 13 13 914
BV4842DBI
in. 42-1/8 22 49 25 0 0 1/2 1/2 36
mm 1070 559 1245 635 0 0 13 13 914
COMBUSTIBLE FLOORING MAY BE INSTALLED
NEXT TO THE FRONT OF THE APPLIANCE.