FMI MM39/44/49VF Outdoor Fireplace User Manual


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9
Clearances
The Importance of Clearances
Warningtothestructuralengineerand/orbuildingcontractor:
Itisyourresponsibilitytobecertainthatthe GrandMeridian
Fireplacecanbeproperlysupportedbythecombustibleoor
system on whichthe replace willrest. Be advised thatthis
engineering equation will be in addition to any live or dead
weightsthattheoorhastocarry.
Clearances to Combustibles
Nothing is more important than paying strict attention to
givingclearancebetween replacesurfaces andsurrounding
“combustibles”themostcommonofwhichare:
Drywall•
Woodooring•
Plywoodsub-ooring•
Framingmaterials•
Particleboard•
Millboard•
Plywoodpaneling•
Required Clearances are:
Unitfront,sides,rear:..........................................0"
CombustibleFloor:.............................................0"
CombustibleSheathingaboveopeningtop:.......8"(200mm)
Sheathingortrimtoopeningsides:....................8"(200mm)
Mantleaboveopening:.......................................12"(300mm)
Openingtosidewall:...........................................24"(500mm)
Insulationfromrebox:.......................................0"
TheGrandMeridianVent-Freereplacemaybeinstalled
at “zeroclearance” toplywood sheathingand touninsulated
woodframingmembersattheunitbottom,sides,rearandtop
whenusedforenclosinganylistedvent-freegas-redlogset
withmaximumheatinputratingsupto40,000Btu/hr.However,
whenaVent-Freereplaceistobeinstalledoncarpeting,wood
ooring,oranycombustiblematerialotherthantileorconcrete,
the Vent-Free replaceshall thenbe installedon ametal or
woodplatformextendingthefullwidthanddepthoftheVent-
Freereplace.
Clearance to Combustible Trim:
GrandMeridianVent-FreeFireplacesaredesignedtobe
custom nished withfacing trim andmantle to be anowner
option. However, all such trim material must meet standard
replacecoderequirements.
Non-combustible facing material must be applied to a
minimumofeightinches(8”)beyondthesidesofthenished
openingoftheVent-Freereplaceandnon-combustiblefacing
materialmustcoveraminimumoftwelveinches(12”)above
thenishedopeningoftheinstalledunit.
Figure 11
1-1/2”
8” MIN
NON-
COMBUSTIBLE
FACIA
Figure 12
1-1/2”
12” MIN
NON-COMBUSTIBLE
FACIA
Clearancetocombustibletrimarethosedistancesrequired
toensurethatcombustiblemantleandfacingmaterialwillnot
beexposedtoexcessiveheatwhiletheunitisoperating.
These clearances should be adequate to prevent
discolorationorwarpingoftrimfacingsduetoheat.However,
circumstancesuniquetoeachinstallationcreatevariablesthat
maybebeyondthescopeofthismanual.Thereforebesure
tofollowgaslogappliancemanufacturer’sexplicitinstallation
instructions regardingall minimumtrim facing,mantle height
andsidewallclearancerequirements.
Figure 13
Partsofthecombustiblemantleassemblylocatedabove
and projecting more than one and one-half inches (1-1/2”)
inchesfromthereboxopeningshallbekeptatleasttwelve
inches(12”)fromthetopoftheopening.
Mantleshelveswithhorizontalprojectionofteninches(10”)
fromthefaceofthereplacemustbeheldtoaminimumvertical
distance of twenty inches (20”) from the top of the nished
replaceopening.
Note: Mantle height clearances may vary among gas log
appliancemanufacturersorwiththeuseofreboxcanopies.
Be sure to follow the gas log appliance manufacturer’s
explicit installation instructions for mantle height clearance
requirements.
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