9
Installing the Fireplace
Step 1. Locating the Fireplace
Thefollowing diagramshows space andclearance require-
ments for locating a fireplace within a room.
ABCD E
49” 22” 39 1/2” 56” 79”
Minimum Clearances
from the Fireplace to Combustible Materials
Inches mm
Glass Front ........................36 ..................... 914
Floor ....................................0........................ 0
Rear ................................... 1/2 ..................... 13
Sides ................................. 1/2 ..................... 13
Top ....................................3 1/2.................... 89
Ceiling**..............................31 ..................... 787
Clearance Requirements
The top, back, and sides of the fireplace are defined by
stand-offs.The minimumclearance to a perpendicular wall
extendingpast the faceof thefireplace is oneinch (25mm).
The back of the fireplace may be recessed 21 1/2 inches
(546 mm) into combustible construction.
Minimum Clearances
from the Vent Pipe to Combustible Materials
Inches mm
Vertical Sections...............1................. 25
Horizontal Sections
Top ......................................3................. 75
Bottom................................1................. 25
Sides ..................................1................. 25
At Wall Firestops
Top ...................................2 1/2.............63.7
Bottom.............................. 1/2 ............... 13
Sides ..................................1................. 25
* See Figure 3.
**Theclearance totheceilingismeasuredfromthetop
of the unit, excluding the standoffs (see Figure 40).
Thedistance fromthe unit tocombustible construction
is to be measured from the unit outer wrap surface to
thecombustibleconstruction,NOT fromthescrewheads
that secure the unit together.
For minimum clearances, see the direct vent termination
clearance diagrams on pages 23 and 24 in this manual.
D
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E
B
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Figure 2. Fireplace Dimensions, Locations,
and Space Requirements
Constructing the Fireplace Chase
A chase is a vertical box-like structure built to enclose the
gas fireplace 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.
CAUTION: TREATMENT OF FIRESTOP SPACERS AND
CONSTRUCTIONOFTHE CHASEMAYVARYWITH THE
TYPE OF BUILDING. THESE INSTRUCTIONSARE NOT
SUBSTITUTES FOR THE REQUIREMENTS OF LOCAL
BUILDINGCODES. THEREFORE,YOUR LOCALBUILD-
ING CODES MUST BE CHECKED TO DETERMINE THE
REQUIREMENTS FOR THESE STEPS.
Factory-builtfireplace chasesshould be constructed inthe
manner of all outside walls of the home to prevent cold air
drafting problems. The chase should not break the outside
buildingenvelope inany manner.
Thismeans that thewalls, ceiling,base plateandcantilever
floorof the chaseshould beinsulated.Vapor andair infiltra-
tionbarriers shouldbeinstalled inthe chaseas per regional
codesfortherestof the home.Additionally,Heat-N-Glo rec-
ommendsthattheinsidesurfacesbesheetrockedandtaped
for maximum air tightness.
Tofurther preventdrafts, thefirestops shouldbe caulkedto
seal gaps. Gas line holes and other openings should be
caulked or stuffed with insulation. If the unit is being in-
stalled on a cement slab, we recommend that a layer of
plywood be placed underneath to prevent conducting cold
up into the room. Be sure to include spark arrestors for
woodburningunits ifthey arerequired.
THECHASE SHOULD BECONSTRUCTEDSOTHATALL
CLEARANCES TO THE FIREPLACEARE MAINTAINED
AS SPECIFIED WITHIN THIS INSTALLERS GUIDE.
