
9
Installing the Fireplace
Step 1. Locating the Fireplace
For space and clearance requirements for locating a fire-
place within a room see Figure 2.
ABCD E
42” 22” 36” 51” 72”
For minimum clearances, see the direct vent termination
clearance diagrams on pages 24 and 25 in this manual.
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
E
1/2“ MIN. (13mm)
D
B
A
C
1” MIN. (25mm)
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.
NOTE:The distancefrom theunit to combustiblecon-
struction is to be measured from the unit outer wrap
surfaceto thecombustible construction,NOTfromthe
screw heads that secure the unit together.
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 and air infiltra-
tionbarriers shouldbeinstalled inthe chaseas per regional
codesfortherest ofthehome.Additionally,werecommend
thatthe inside surfacesbe sheetrockedand tapedformaxi-
mum 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.
Figure 2. Fireplace Dimensions, Locations,
and Space Requirements
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
SurroundSides* ..................0........................ 0
Top....................................3 1/2.................... 89
Ceiling**..............................31..................... 787
* See Figure 3
**Theclearance to theceilingismeasuredfromthetop
of the unit, excluding the standoffs (see Figure 37).