Majestic ASH50 User manual

1
Majestic • Ashland ASH50 Installation Manual • 4059-900 • Rev E • 04/19
WOODBURNING FIREPLACE
Model(s):
Installation Manual
Installation and Fireplace Setup
WARNING
HOT SURFACES!
Glass and other surfaces are hot during
operation AND cool down.
Hot glass will cause burns.
• DO NOT touch glass until it is cooled
• NEVER allow children to touch glass
• Keep children away
• CAREFULLY SUPERVISE children in same room as
replace.
• Alert children and adults to hazards of high temperatures.
High temperatures may ignite clothing or other ammable
materials.
• Keep clothing, furniture, draperies and other ammable
materials away.
INSTALLER: Leave this manual with party responsible for use and operation.
OWNER: Retain this manual for future reference.
ASH50
NOTICE: DO NOT discard this manual!
• DO NOTstoreorusegasolineorotheram-
mablevaporsandliquidsinthevicinityofthis
or any other appliance.
• DO NOToverre.Overringwillvoidyour
warranty.
• Comply with all minimum clearances to com-
bustiblesasspecied.Failuretocomplymay
causehousere.
WARNING: If the information in these
instructions is not followed exactly, a re
or explosion may result causing property
damage, personal injury, or death.
This replace uses DuraChimney II pipe.
2” CLEARANCE TO COMBUSTIBLES AND BUILDING INSULATION FROM CHIMNEY REQUIRED.
Fire Risk.
WARNING
For use with solid wood fuel only.
Other fuels may overre and generate poisonous
gases (i.e. carbon monoxide).
Installation and service of this appliance should be performed by
qualified personnel. Hearth & Home Technologies recomends HHT
Factory Trained or NFI certified professionals.

2Majestic • Ashland ASH50 Installation Manual • 4059-900 • Rev E • 04/19
Safety Alert Key:
• DANGER! Indicatesahazardoussituationwhich,ifnotavoidedwill result in death or serious injury.
• WARNING!Indicatesahazardoussituationwhich,ifnotavoidedcould result in death or serious injury.
• CAUTION! Indicatesahazardoussituationwhich,ifnotavoided,couldresultinminorormoderateinjury.
• NOTICE:Indicatespracticeswhichmaycausedamagetothereplaceortoproperty.
Table of Contents
1 Product Specic & Important Safety Information
A.ApplianceCertication 4
B.Non-CombustibleMaterials 4
C.CombustibleMaterials 4
2 Getting Started
A. Typical Fireplace System 5
B. Design and Installation Considerations 6
1. Selecting Fireplace Locations 6
2. Locating Fireplace & Chimney 7
C. Tools and Supplies Needed 8
D. Inspect Fireplace and Components 8
E.FireplaceSystemRequirements 8
3 Framing and Clearances
A. Fireplace Dimensions 9
B. Clearances 10
MinimumClearancestoCombustibles 10
C. Construct the Chase 11
D. Frame the Fireplace 12
E.SecureandLeveltheFireplace 13
F. ProtectiveMetalHearthStrips 13
G.OutsideAirKit 14
4 Chimney and Termination Installation
A.ChimneyRequirements 15
B. Clearances 17
C. Installation Notes 17
D.FrameOpenings 17
E.CutRoofOpening 17
F. Install Firestop 17
G.AssembleChimneySections 18
H.UsingOffsets/Returns 18
I. OffsetElbowInstallation 19
J. SupplementarySupport&Stabilizer 19
K. Install Attic Insulation Shield 20
L. Install Roof Radiation Shields 20
M.AttachFlashing 20
Field-Constructed Chase Top Flashing 21
N. Finish Top 22
O.ChimneyTerminationRequirements 23
5 Shrouds
A.ShroudRequirements 24
B.HouseStyleShroud 25
C.Arch/MailboxStyleShroud 26
D. Pyramid Style Shroud 26
6 Finishing
A.FinishingMaterial 27
B.HearthExtension,BuildingandFinishing 29
1. Fireplace Installed Flush on the Floor
 andHearthExtensionRaisedto
 BottomofFireboxOpening 29
2.RaisedHearthExtensionandRaisedFireplace 30
3.FireplaceOpeningandHearthExtensionFlush
 withtheFloor 31
C.Non-CombustibleSealantMaterial 31
D.Sidewalls/Surrounds 32
E.MantelandWallProjections 32
7 Fireplace Setup
A.InstallHearthMoldedBrickPanel 33
B.InstallBackMoldedBrickPanel 33
C.InstallSideMoldedBrickPanel 33
D.InstallScreens 34
E.InstallMortar(Optional) 34
F.Grate 34
G.GasLog/LighterProvision 35
H.WoodBurningInserts 35
8 Reference Materials
A.ChimneyComponents 36
B.OptionalComponents 36
►
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Majestic • Ashland ASH50 Installation Manual • 4059-900 • Rev E • 04/19
Customer:
Lot/Address
Model (circle one): ASH50
YES IF NO, WHY?
WARNING! Risk of Fire or Explosion! Failure to install fireplace acording to these instructions can lead to a fire or
explosion.
Verified that the chase is insulated and ventilated (Pg. 11)
Verified clearances to combustibles. (Pg. 10)
Fireplace is leveled and secured. (Pg. 13)
Hearth extension size/height decided. (Pg. 29)
Outside air kit installed. (Pg. 14)
Chimney configuration complies with diagrams.
Firestops installed.
Roof flashing installed.
Chimney installed, locked and secured in place with proper clearance.
Terminations installed.
Installer:
Shrouds Section 5 (Pg. 24)
Shrouds properly installed per instructions.
Dealer/Distributor Phone #
Serial #:
Chimney Section 4 (Pg. 15)
Fireplace Install
Protective hearth strips installed per manual requirements. (Pg. 13)
Attic insulation shield installed.
ATTENTION INSTALLER:
Follow this Standard Work Checklist
This standard work checklist is to be used by the installer in conjuction with, not instead of, the instructions contained in this installation
manual.
Date Installed:
Location of Fireplace:
4059-904 • Rev A• 4-09-18
Comments communicated to party responsible
Combustible materials not installed in non-combustible areas.
Verified all clearances meet installation manual requirements.
Mantels and wall projections comply with installation manual requirements.
All packaging and protective materials removed.
Fireplace Setup Section 7 (Pg. 33)
__________________________ by ______________________on ________
Molded brick panels installed correctly.
Optional doors properly installed.
• Photographing the installation and copying this checklist for your file.
• That this checklist remain visible at all times on the fireplace until the installation is complete.
Hearth & Home Technologies recommends the following:
Grate properly installed
Firescreen installed properly.
(Builder/Gen. Contractor) (Installer) (Date)
Comments: Further description of the issues, who is responsible (Installer/Builder/Other Trades, etc.) and corrective action
needed:_________________________________________________________________________________________________
Manual bag and all of its contents are removed from the fireplace and given to the party
responsible for use and operation.
________________________________________________________________________________________________________
________________________________________________________________________________________________________
Hearth extension installed per manual requirements.
Finishing Section 6 (Pg. 27)

4Majestic • Ashland ASH50 Installation Manual • 4059-900 • Rev E • 04/19
WARNING! Risk of Fire! Hearth & Home Technologies
disclaims any responsibility for, and the warranty and
agency listing will be voided by the following actions.
DO NOT:
• installoroperatedamagedreplace
• modifyreplace
• install other than as instructed by Hearth & Home
Technologies
• operate the fireplace without fully assembling all
components
• overre
• install any component not approved by Hearth & Home
Technologies
• install parts or components not Listed or approved
Improper installation, adjustment, alteration, service or
maintenance can cause injury or property damage. For
assistance or additional information, consult a qualied
installer, service agency or your dealer.
B. Non-Combustible Materials
• Materialswhich willnot igniteand burn,composed of
anycombinationofthefollowing:
- Steel - Iron
- Brick - Tile
- Concrete - Slate
- Glass - Plasters
• MaterialsreportedaspassingASTM E 136, Standard
Test Method for Behavior of Metals, in a Vertical Tube
Furnace at 750° C
C. Combustible Materials
• Materialsmadeoforsurfacedwithanyofthefollowing
materials:
- Wood - Compressedpaper
- Plantbers - Plastic
- Plywood/OSB - Sheetrock(drywall)
• Anymaterialthatcanigniteandburn;ameproofedor
not, plastered or un-plastered
1 Product Specic & Important Safety Information
WARNING: This product and the fu-
els used to operate this product (wood
and wood pellets), and the products of
combustion of such fuels, can expose
you to chemicals including carbon black,
which is known to the State of California
to cause cancer and carbon monoxide,
which is known to the State of California to
cause birth defects or other reproductive
harm. For more information go to: www.
P65Warnings.ca.gov.
A. Appliance Certication
Thisreplacesystemhasbeentestedandlistedinac-
cordancewithUL127standardsbyUnderwritersLabo-
ratories Inc. for installation and operation in the United
States.
ThisreplacemaybeinstalledinsleepingroomsEX-
CEPT in manufactured homes. If installed with a gas log
set,provisionsfortheNationalFuelGasCodemustbe
met.
Thisreplacehasbeentestedandlistedforusewith
theoptionalcomponentsspeciedinthismanual.These
optionalcomponentsmaybepurchasedseparatelyand
installedatalaterdate.Theoutsideairkitsmustbe
installedatthetimeofreplaceinstallation.

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Majestic • Ashland ASH50 Installation Manual • 4059-900 • Rev E • 04/19
2 Getting Started
Additional lateral
support for chimney
above roof (or enclosed
in chase) if needed
Ceiling firestop
on floor of attic
Support straps
on rafter supports
chimney (not shown)
Termination cap
Chimney penetrates roof
preferably without affecting
roof rafters
Framing headed off
in ceiling joists
Enclosed space above
and around fireplace
Mantel and surround
Decorative facing
and trim
Hearth extension
Factory-built fireplace
Protective metal
hearth strip(s)
Combustible
framing/header
on top of
V-shaped
standoffs
(spacers)
Chimney system
Attic insulation shield must be used
here to keep insulation away
from chimney if attic is insulated
Attic Shield Collar
Storm Collar
Outside Air
(both sides)
Chase Top Flashing
(4) Roof Radiation Shields
A. Typical Fireplace System
Figure 2.1 Typical Fireplace System

6Majestic • Ashland ASH50 Installation Manual • 4059-900 • Rev E • 04/19
A*
F
D
BC
1/2 in. (13 mm) all
configurations
1-1/2 in. min. air space
from fireplace to
combustible materials.
1/2 in. min. air space at
nailing flanges.
Note:
In an exterior chase
or projecting into a
garage
Across a
corner
As a
room
divider Along a wall
92 in.
(2337 mm)
G
B
E
48 in.
(1219 mm)
MINIMUM
24 in. (610 mm)
from fireplace opening to
any perpendicular wall
A
B
G
G
B
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Model # A B C D E F G
in. 85 7/8 61 7/8 103 1/4 51 5/8 25 1/4 73 28 1/2
mm 2181 1572 2623 1311 641 1854 724
ASH50
*12 in. (305 mm) extra space
included for each outside air
connection. If outside air duct has
no bend, this dimension may be
reduced as long as minimum
clearances are met.
Figure 2.2 Fireplace Locations
NOTICE:
• Illustrationsandphotosreecttypicalinstallationsand
are FOR DESIGN PURPOSES ONLY.
• Illustrations/diagrams are not drawn to scale.
• Actual installation/appearance may vary due to individual
design preference.
• Hearth & Home Technologies reserves the right to alter
its products.
NOTICE: In addition to these framing dimensions, also
reference the following section:
• Framing and Clearances (Section 3).
NOTICE:
A minimum 1-1/2 in. air clearance at the back and
sides of the replace assembly must be main-
tained.
Chimney sections at any level require a 2 in.
minimum air space clearance between the
framing and chimney sections.
B. Design and Installation Considerations
NOTICE: Check building codes prior to installation.
• InstallationMUSTcomplywithlocal,regional,stateand
national codes and regulations.
• Consultinsurancecarrier,localbuildinginspector,re
ofcialsorauthoritieshavingjurisdictionoverrestrictions,
installation inspection and permits.
• Before installing,determinethefollowing:
- Wherethereplaceistobeinstalled.
- Theventsystemcongurationtobeused.
- Gas supply piping.
- Electrical wiring.
- Framingandnishingdetails.
- Whetheroptionalaccessories-devicessuchasa
fan, wall switch or remote control - are desired
1. Selecting Fireplace Locations
Thisreplacemaybeusedasaroomdivider,installed
alongawall,acrossacornerorusedinanexteriorchase.
See Figure 2.2.
Locatingthereplaceinabasementshouldbeavoided.
Locatingnearfrequentlyopeneddoors,centralheat
outletsorreturns,orotherlocationsofconsiderableair
movementcanaffecttheperformance.
Considerationshouldbegiventothesefactorsbefore
deciding on a location.

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Majestic • Ashland ASH50 Installation Manual • 4059-900 • Rev E • 04/19
2. Locating Fireplace & Chimney
Locationofthereplaceandchimneywillaffectperfor-
mance.
• Installwithinthewarmairspaceenclosedbythebuilding
envelope.Thishelpstoproducemoredraft,especially
duringlightinganddie-downofthere.
• Installingthereplaceinabasementisnotrecommended.
• Penetrate the highest part of the roof. This minimizes
the effects of wind loading.
• Locate termination cap away from trees, adjacent
structures,unevenrooflinesandotherobstructions.
• Minimizetheuseofchimneyoffsets.
• Considerthereplacelocationrelativetooorandceiling
and attic joists.
• Takeintoconsiderationtheterminationrequirementsin
Section4.
Marginal Location:
• Below peak
Location NOT recommended:
• Not the highest point of the roof
• Wind loading possible
Multi-level Roofs
Windward
Leeward
Recommended Location:
• Above peak
Recommended:
• Insulated exterior chase
in cooler climates
Recommended Location:
• Above peak
• Inside heated space
Location NOT recommended:
• Too close to tree
• Below adjacent structure
• Lower roof line
• Avoid outside wall
Marginal Location:
• Wind loading possible
Not recommended in basement due
to high negative pressure concerns
that effect draft
Figure 2.3 Recommended Chimney Locations
• Installtheoutsideairkitwiththeintakefacingprevailing
winds during the heating season.
• Ensure adequate outdoor air for all combustion
appliancesandexhaustequipment.
• Ensurefurnaceandairconditioningreturnventsarenot
locatedintheimmediatevicinityofthereplace.
• Avoidinstallingthereplaceneardoors,walkwaysor
small isolated spaces.
• Recessedlightingshouldbea“sealedcan”design.
• Attic hatches weather stripped or sealed.
• Atticmountedductworkandairhandlerjointsandseams
taped or sealed.

8Majestic • Ashland ASH50 Installation Manual • 4059-900 • Rev E • 04/19
C. Tools and Supplies Needed
Beforebeginningtheinstallationbesurethefollowing
toolsandbuildingsuppliesareavailable:
Reciprocating saw Framing material
Pliers Non-combustiblesealant
Hammer Gloves
Phillipsscrewdriver Framingsquare
Flatbladescrewdriver Electricdrillandbits
Plumbline Safetyglasses
Level Tapemeasure
1/2-3/4in.length,#6or#8self-drillingscrews
Misc.screwsandnails
D. Inspect Fireplace and Components
WARNING! Risk of Fire and/or Explosion! Damaged
parts could impair safe operation. DO NOT install dam-
aged,incompleteorsubstitutecomponents.Keepre-
place dry.
• Removereplaceandcomponentsfrompackagingand
inspect for damage.
• Vent system components and doors are shipped in
separatepackages.
• Report to your dealer any parts damaged in shipment.
• Read all the instructions before starting the
installation. Follow these instructions carefully
during the installation to ensure maximum safety
and benet.
E. Fireplace System Requirements
TheHeatilatorreplacesystemrequirementsconsistof
thefollowing:
• Fireplace
- Molded brick panels (hearth panel Included with
replace,sideandbackpanelssoldseparately)
- Firescreen(includedwithreplace)
- HearthExtension(soldseparately)
- Grate(includedwithreplace)
• OutsideAirSystem
- AirInletHoodx2(includedwithreplace)
- Flex(required,soldseparately)
• Chimney System
- AtticInsulationShield(soldseparately)
- Chimneyterminationcap(soldseparately)
• Non-combustiblenishmaterial
►

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Majestic • Ashland ASH50 Installation Manual • 4059-900 • Rev E • 04/19
3 Framing and Clearances
A. Fireplace Dimensions
16 1/8 in.
408 mm
Gas Line
Knockout
11 1/8 in.
282 mm
6 7/8 in.
175 mm
5 in.
129 mm
50 in.
1270 mm
60 7/8 in.
1546 mm
3 3/4 in.
97 mm
38 in.
965 mm
54 in.
1372 mm
74 1/8 in.
1883 mm
70 3/4 in.
1797 mm
16 1/8 in.
408 mm
11 1/8 in.
282 mm
6 7/8 in.
175 mm
5 in.
129 mm
45 1/8 in.
1146 mm
11 in.
281 mm
27 1/2 in.
699 mm
74° TYP.
Gas Line
Knockout
22 1/2 in.
572 mm
61 7/8 in.
1572 mm
5 1/2 in.
140 mm
Outside
Air
Outside
Air
Figure 3.1 Fireplace Dimensions

10 Majestic • Ashland ASH50 Installation Manual • 4059-900 • Rev E • 04/19
1/2 in. air space
established by
spacers
Chase Top
Flashing
Roof
Radiation Shield
1/2 in.
Air Space
Spacers furnished with
complete Chase Top Flashing
(May be field-fabricated)
1/2
Storm collar must
be installed 1 in.
off chase top
CHASE TOP CLEARANCES
1 1/2” Ventilation Opening
around Chimney Pipe
(insulation)
0 in. to level
of standoffs
Attic
Insulation Shield
(ceiling)
(roof)
(attic)
(ceiling)
Attic Shield Collar
Ceiling Firestop
Storm Collar
Chase Top Flashing
1-1/2 in. (38 mm)
to back & sides
of appliance
(except at nailing
flanges where it is
1/2 in. [13 mm])
Must have 2 in. (51 mm)
minimum clearance
to any combustible materials
including header
0 in.
to floor
2 in. (51 mm) min.
Shaded areas
represent
2 in. (51 mm) min.
air space clearance
required around pipe
Combustible Object
48 in.
1219 mm
1 in.
B. Clearances
WARNING! Risk of Fire!
You must comply with all minimum air space clearances
tocombustiblesasspeciedinFigure3.2.DO NOT pack
required air spaces with insulation or other materials.
Framing or nishing material used on the front of, or in
frontof,thereplacecloserthantheminimumslistedmust
be constructed entirely of non-combustible materials (i.e.,
steel studs, concrete board, etc.). Failure to comply may
causere.
Figure 3.2 Clearances to Combustible Materials
Minimum Clearances to Combustibles
WITHIN ENCLOSURE AREA
Fireplacetobackwall 1-1/2in.(38mm)
Fireplace to sidewall 1-1/2in.(38mm)
Top standoffs to header 0in.(0mm)
Door opening to sidewall 24in.(610mm)
MANTEL
Mantelminimumheight 63-3/4in.(1619mm)
Maximummanteldepth 12in.(305mm)

11
Majestic • Ashland ASH50 Installation Manual • 4059-900 • Rev E • 04/19
C. Construct the Chase
Achaseisaverticalboxlikestructurebuilttoenclosethe
replaceand/oritsventsystem.Verticalchimneysthat
runontheoutsideofabuildingmustbeinstalledinsidea
chase.
Incoldclimates,Hearth&HomeTechnologiesrecom-
mendsthatthechasebewellinsulatedusingbatttype
insulationbetweenthejoists.
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outside
wallsofthehometopreventcoldairdraftingproblems.
Thechaseshouldnotbreaktheoutsidebuildingenvelope
inanymanner.Allouterwallsneedtobeinsulated.
Buildingcodesrequirefalseceilingandceilingrestops/
atticshieldsateachoorofthechaseorevery10ft(3048
mm)ofclearspacetocontrolspreadofre.
Walls,ceiling,baseplateandcantileveroorattherst
levelofthechaseshouldbeinsulated(seeFigure3.3.)
Vaporandairinltrationbarriersshouldbeinstalledinthe
chase as per regional codes for the rest of the home. Ad-
ditionally,Hearth&HomeTechnologiesrecommendsthat
theinsidesurfacesbedrywalledandtaped(ortheuseof
anequivalentmethod)formaximumairtightness.
Holesandotheropeningsshouldbecaulkedwithhigh
temperaturecaulkorstuffedwithunfacedberglass
insulation.
Ceiling
Firestop
Metal Chase Top
Round Termination Cap
False Ceiling
Insulation in the
outside walls
of the chase
Attic
Insulation
Shield
Chimney
Ceiling
Firestop
Tabs
False Ceiling
False Ceiling
Insulation
Insulation
Storm Collar
Figure 3.3 Chase Assembly
1 2 3
All outside walls should be insulated.
Figure 3.4 Chase Constructions
1. Fireplaceandchimneyenclosedinanexteriorchase.
 2. Chimneyoffsetthroughexteriorwallandenclosedinchase.
 3. Chaseconstructedonroof.
• The chase is constructed using framing materials much
thesameasthewallsinyourhome.Avarietyofsiding
materials may be used including brick, stone, veneer
brick,orstandardsidingmaterials.
• In constructing the chase, several factors must be
considered:
- Maintain a 2 in. (51 mm) air space around the
chimney.
- The chase top must be constructed of non-
combustiblematerial.
- Incoldclimates,arestopspacerandatticinsulation
shieldshouldbeinstalledinaninsulatedfalseceiling
at the 8 ft. (2438 mm) level above the replace
assembly.Thisreducesheatlossthroughthechase.
- Incold climates, the walls of the chase shouldbe
insulatedtothelevelofthefalseceilingasshownin
Figure3.3.Thiswillhelpreduceheatlossfromthe
homearoundthereplace.
ThreeexamplesofchaseapplicationsareshowninFig-
ure3.4.
WARNING! You must install false ceilings and ceil-
ing restops at each oor of the chase or every 10 ft
(3.05 m) to control spread of re.
WARNING! Risk of Fire! DO NOT sealareabetweenre
stop opening and chimney pipe except where they enter
the attic or leave the warm air envelope of the home (use
600° F sealant).
WARNING! Risk of Fire! You must maintain a minimum
2 in. (51 mm) air space clearance to insulation and oth-
er materials surrounding the chimney system.
• Insulationandothermaterialsmustbermlysecuredto
prevent accidental contact with chimney system.
• The chase must be properly blocked to prevent blown
insulation or other combustibles from entering and
makingcontactwithreplaceorchimney.
• Failure to prevent contact between insulation or other
materials and chimney system may cause overheating
andre.

12 Majestic • Ashland ASH50 Installation Manual • 4059-900 • Rev E • 04/19
WARNING! Risk of Fire! You must comply with all
minimum air space clearances to combustibles. DO NOT
pack required air spaces with insulation or other materi-
als.
WARNING! Risk of Fire! Comply with all minimum clear-
ancesspecied.
• A minimum 1-1/2 in. (38 mm) air clearance must be
maintained at the back and sides of the fireplace
assembly.
• Chimney sections at any level require a 2 in. (51 mm)
minimum air space clearance between the framing and
chimney section.
CAUTION! Risk of Cuts/Abrasions. Wear protective gloves
and safety glasses during installation. Sheet metal edges
are sharp.
B
C
A
21 in. (533 mm)
framing.
Note: Framing must be extended straight up 84 in.
(2134 mm) from the base of the fireplace.
D
D = extra space needed for outside air connection.
If outside air duct has no bend, this dimension may be
reduced as long as minimum clearances are met.
D
A B * C ** D
in. 61 7/8 28 1/2 74 1/2 12
mm 1572 724 1892 305
Model #
** Adjust header height for raised floor under fireplace.
ASH50
* If interior of chase will be drywalled, add the thickness to this measurement.
1/2 in.
(13 mm)
Fireplace must be set out
1/2 in. (13 mm) in front of
the face of the framing
material.
Figure 3.5 Framing the Fireplace
D. Frame the Fireplace
NOTICE: Hearth extension design must be determined
beforeinstallationofreplace.
Ifthereplaceisplacedontheoor,themaximumheight
ofanishedraisedhearthis3-3/4”,ifyouwantahigher
raisedhearththereplacemustbeplacedonaplatform.
Figure3.5showsatypicalframing(using2x4lumber)of
thereplace,assumingcombustiblematerialsareused.
Allrequiredclearancestocombustiblesaroundthere-
placemustbeadheredto.SeeFigure3.2.Anyframing
acrossthetopofthereplacemustbeabovethelevelof
thetopstandoffs.(Norecessabovestandoffs.)
The nishedcavitydepthmustbenolessthan28-1/2in.
(673mm)fromthenishedbackwalltotheoutsideoffront
wallframing.Framingmustextendstraightupalltheway
to the ceiling.

13
Majestic • Ashland ASH50 Installation Manual • 4059-900 • Rev E • 04/19
E. Secure and Level the Fireplace
Thisreplacemaybeplacedoneitheracombustibleor
noncombustiblecontinuousatsurface.Slidethereplace
intoposition.Besuretoprovidetheminimum1-1/2in.air
clearanceatthesidesandbackofthereplace.
Thereplaceshouldbepositionedsothefaceofthenon-
combustiblematerialonthereplacewillbeushwiththe
face of the drywall on the walls.
Levelthereplaceandshimasnecessary.
1 in. (25 mm)
overlap
Protective metal strips are placed 2 in. (51 mm) under
the front of the fireplace and must extend beyond the
front and sides of fireplace opening by 2 in. (51 mm).
Raised Platform
Floor
2 in.
(51 mm)
1 in. (25 mm) min.
overlap
2 in.
(51 mm)
Top piece must overlap
bottom piece
Figure 3.7 Protect the Front of an Elevated Platform
F. Protective Metal Hearth Strips
Figure 3.6 Position the Protective Metal Hearth Strips
• Locatethetwoprotectivemetalhearthstripsmeasuring
approximately26in.x4in.(660mmx102mm)included
withthisreplace.
• Slideeachmetalstrip2in.(51mm)underfrontedgeof
replace.
• Overlapstripsinthemiddleofreplaceopeningby1in.
(25mm)minimum.
• Metal strips must extend beyond the front and sides
of the replace opening by at least 2 in. (51 mm),
Figure3.6).
• Protectthefrontofaplatformelevatedabovethehearth
extensionwithmetalstrips(notincludedwithreplace)
per Figure 3.7. See Section 6 for hearth extension
instructions.
WARNING! Risk of Fire! Protective metal hearth
strips MUST be installed on combustible surfaces. DO
NOT cover metal strips with combustible materials.
Sparksorembersmayigniteooring.
WARNING! Risk of re! High temperatures, sparks,
embers or other burning material falling from the
replacemayigniteooringorconcealedcombustible
surfaces.
• Protective metal hearth strips MUST be installed.
• Hearth extensions MUST be installed exactly as
specied.
WARNING! Risk of Fire! Prevent contact with sagging,
loose insulation.
• DO NOT install against vapor barriers or exposed
insulation.
• Secure insulation and vapor barriers.
• Provide minimum air space clearances at the sides and
backofthereplaceassembly.

14 Majestic • Ashland ASH50 Installation Manual • 4059-900 • Rev E • 04/19
3 ft min. from
top of uppermost
chimney section
to air inlet.
G. Outside Air Kit (Required on both sides)
Outsideairkitsmustbeusedforcombustionandtopro-
videcoolingairtopreventoverheating.Hearth&Home
Technologies recommends you utilize the shortest duct
runtooptimizetheperformanceoftheoutsideairkit.The
outsideairinlethoodsshouldbepositionedinamanner
thatwillnotallowsnow,leaves,etc.toblocktheinlet.In
someinstallationstheairductmayneedtoberunverti-
cally.Insuchaninstallation,a3ft(914mm)heightdiffer-
encemustbemaintainedfromthetopoftheuppermost
chimneysectiontotheoutsidecombustionairinlethood.
RefertoFigures3.8and3.9whenplacingtheoutsideair
inlet hood.
WARNING! Risk of Fire! The outside air kits are installed
onthebothsidesofthereplacetopreventoverheating
andre.
• Cuta6in.(152mm)holeinoutsidewalltoaccommodate
air piping.
• Use6in.(152mm)ex(notsupplied)todirectlyconnect
outsideairtoreplaceintake.Insulatethepipetoprevent
frost condensation.
• Use the supplied outside air inlet hoods.
• Seal between the wall and the pipe with silicone to
preventmoisturepenetrationandairleaks.
• Sealbetweentheoutsideairinlethoodsandthehouse
withsiliconetopreventairinltration.
CAUTION! Risk of Cuts/Abrasions. Wear protective
gloves and safety glasses during installation. Sheet metal
edges are sharp.
CAUTION! Risk of Fire or Asphyxiation! DO NOT draw
outsidecombustionairfromwall,oororceilingcavity,or
enclosed spaces such as an attic or garage.
• DO NOT place outside air inlet hood close to exhaust
vents or chimneys. Fumes or odor could be drawn into
theroomthroughthereplace.
• Locate outside air inlet hood to prevent blockage from
leaves, snow/ice, or other debris. Blockages could cause
combustion air starvation.
Figure 3.8 Outside Air Inlet Locations
Outlet placed
higher than 3 ft
below the
termination cap
Attic space
Garage or
combustible
liquids storage
Outlet blocked by
snow, leaves, etc.
Clear area
outside
house or in
ventilated
crawl space
YES
NO
NO
NO
NO
Factory-built
fireplace
• Use UL181 Class 1 or Class 0 rigid or flexible ducting.
• Install with short run or mainly straight duct, except small
dip for cold air trap which will help prevent flow of cold air.
• Secure flex duct with screws or wire ties.
Figure 3.9 Outside Air Installation
Outside air is re-
quired to be in-
stalled on both
sides (right side
not shown)
NOTICE: The fireplace provides some outside air for
combustion. Other methods may be necessary if more air
is required.
►
►

15
Majestic • Ashland ASH50 Installation Manual • 4059-900 • Rev E • 04/19
4 Chimney and Termination Installation
NOTICE: Chimney performance may vary.
• Trees, buildings, roof lines and wind conditions affect
performance.
• Chimney height may need adjustment if smoking or
overdraft occurs.
A. Chimney Requirements
Measureverticaldistancesfromthebaseofthereplace.
WARNING! Risk of Fire! You must maintain 2 in. (51
mm) air space clearance to insulation and other com-
bustible materials around the chimney system. Failure
to do so may cause overheating and re.
Feet Meters
•Minimumoverallstraightheight 18 5.49
•Minimumheightwithoffset/return 18.5 5.64
•Maximumheight 50 15.24
•Maximumchimneylengthbetweenanoffset
and return
20 6.10
•Maximumdistancebetweenchimney
stabilizers
25 7.62
•Maximumunsupportedchimneylength
betweentheoffsetandreturn
61.83
•Maximumunsupportedchimneyheightabove
thereplace
25 7.62
•Maximumunsupportedchimneyaboveroof 61.83
•Minimumheightwithdoubleoffset/return 22.5 6.86
Height of Chimney Components in. mm
Stabilizer
14DCA-ST
Firestop
14DCA-FS
Elbows
14DCA-E15-15°Elbow
14DCA-E30-30°Elbow
Miscellaneous
14DCA-ES-ElbowStrap
14DCA-SS-SupplementarySupport
14DCA-IS-InsulationShield
14DCA-RRS-RoofRadiationShield
14DCA-CTF-ChaseTopFlashing
14DCA-CTC-ChaseTopCollar
14DCA-VC1-ChimneyCap
14DCA-SC-StormCollar
14DCA-WS-WallStrap
Chimney Sections*
14DCA-12 101/2 267
14DCA-18 161/2 419
14DCA-36 341/2 876
14DCA-48 461/2 1181
*Dimensionsreecteffectiveheight.
Table 4.1

16 Majestic • Ashland ASH50 Installation Manual • 4059-900 • Rev E • 04/19
(4) Roof
Radiation
Shields
Chimney Section
Chimney Section
Attic Insulation
Shield & Collar
Square Frame
Firestop
Square Frame
Firestop
Chimney Section
74 1/8 in.
(1883 mm)
Effective
Height
Termination
Cap
Storm
Collar
Chase Top
Flashing
Figure 4.1
Determine the chimney components needed to complete
yourparticularinstallation:
• Measure the total vertical height of the fireplace
installationfromthebaseofthereplaceassemblyto
theapproximatelocationofthebottomofthetermination
cap.
• Subtracttheeffectiveheightofthereplaceassembly
(seeFigure4.1)fromthetotalverticalheighttodetermine
theoverallheightofthechimneyinstallation.
• Create a schematic for your application similar to Figure
4.1showingcomponentsrequired(referringtoTable4.1).
• Installaceilingrestopwheneverthechimneypenetrates
aoor/ceiling.
NOTICE: A maximum of two offset and return may be
used.
CAUTION! Risk of Fire and/or Asphyxiation! DO
NOT connectthisreplacetoachimneyueservicing
another appliance. Do NOT connect to any air distribu-
tion duct or system. These actions could cause over-
heating/reinthechimneyue, orreleaseofexhaust
fumes into the living areas.

17
Majestic • Ashland ASH50 Installation Manual • 4059-900 • Rev E • 04/19
A MAJOR CAUSE OF VENT RELATED FIRES IS FAIL-
URE TO MAINTAIN REQUIRED CLEARANCES (AIR
SPACES) TO COMBUSTIBLE MATERIALS. IT IS OF
THE UTMOST IMPORTANCE THAT DURACHIMNEY II
BE INSTALLED ONLY IN ACCORDANCE WITH THESE
INSTRUCTIONS.
B. Clearances
Alwaysallowatleasta2-inchclearancebetweenDura-
ChimneyIIPipeandanycombustiblematerials.
• Neverllanyrequiredclearancespacewithinsulation
or any other materials.
• Combustible materials include lumber, plywood,
sheetrock,plasterandlath,furniture,curtains,electrical
wiring,andbuildinginsulation.
C. Installation Notes
Proper planning for your DuraChimney II installation will
resultingreatersafety,efciency,andconvenience,as
wellassavingtimeandmoney.Youmust use only autho-
rized DuraChimney II parts to maintain a listed chimney
system. Do notmixpartsortrytomatchwithotherprod-
uctsoruseimprovisedsolutions.
• Do notinstalldamagedormodiedparts.
• Practice good workmanship. Sloppy work could
jeopardize your chimney’s safety.
• Keep electrical wiring and building insulation away
from all chimneys.
• When deciding the location of your chimney, try to
avoidmodicationstoroofbeamsandotherstructural
componentsofthebuilding.
Ifyouhaveanyquestions,contacteitheryourdealeror
Simpson Dura-Vent directly.
D. Frame Openings
• Fromtheceiling,dropaplumbbobtothecenterofthe
replace’sueoutletandmarkthiscenterpointonthe
ceiling.
• Markappropriatecuttinglinesaroundthecenterpoint.
Cutasquareholeintheceiling.Framealevel,square,
21in.x21in. (533 mm x 533 mm) opening centered
overtheholethatyouhavecut.
• Frameopeningsateachoorlevelabovethereplace
(Figure4.1).Theseopeningsaretoholdtherestopand
attic insulation shield.
• Locateeachopeningbydroppingaplumbbobtothe
fourcornersoftheopeningbelow.
• Maintain the minimum 2-inch clearance/air space.
Maintaintheminimumclearancesanddimensionsas
speciedinTable4.1.
E. Cut Roof Opening
Determineandcutanopeningintheroofdirectlyabove
theopeningbelow,andatleast4-incheslargerthanthe
chimney’soutsidediametertoprovideatleasta2-inch
clearance all around the chimney.
• The chimney mustbecenteredwithinthisopeningand
maintaintheminimum2-inchclearancetocombustibles.
F. Install Firestop
Arestopisrequiredoneachoorpenetrationinmultisto-
ryinstallation.BuildingCodesrequirearestopatevery
oor/ceilinglevel,includingwherethechimneypenetrates
intotheattic.Figure4.1showsatypical2-storyinstalla-
tion with an attic.
Note:arestopisnot installed where the chimney pen-
etrates through the roof.
• Therestopisinstalledontheundersideoftheceiling/
oorframing(Figure4.2).
• Useaminimumofone8pennynailorone1-1/4”wood
screw per corner.
Framing
Figure 4.2

18 Majestic • Ashland ASH50 Installation Manual • 4059-900 • Rev E • 04/19
G. Assemble Chimney Sections
• Attach the rst chimney section or offset onto
thetopofthereplace(Figure4.3).Sheetmetal
screwsarerequiredtoconnectchimneysection
to the replace starter collar. Continue to add
additional sections of chimney as needed.
• Use a wall strap every eight feet of chimney
height.
• For each additional chimney section use four
ofthesheetmetalscrews provided tomakea
secureconnectionbetweenthechimneysections
(Figure4.4).Donotpenetratetheinnerlinerof
the chimney.
Figure 4.3
Figure 4.4
H. Using Offsets/Returns
• Useanoffset/returntobypassoverheadobstructions.
• Anoffsetandreturncanbeusedasasingleentityorseparated
bychimneysection(s).
WARNING! Risk of Fire! DO NOT use offset/returns greater than
30 ft. Chimney draft will be restricted and could cause overheating
andre.
• Measure the shift required to avoid the overhead obstruction
(Offset,Figure4.5).
• FindtheappropriateoffsetdimensionlistedinTable4.2.
• Therise (seeFigure 4.5) coinciding with the offsetdimension
measurement in Table 4.2 represents the required vertical
clearanceneededtocompletetheoffset/return.
Table 8.2
Elbow
Angle
from
Vertical
Chimney
Length
Between
Elbows
Offset
Inches
Rise
Inches
Offset
Millimeters
Rise
Millimeters
15° 025/8 215/8 67 549
15° 12in./305 mm 51/2 321/4 140 819
15° 18in./457 mm 71/8 38 181 965
15° 36in./914 mm 113/4 553/8 298 1407
15° 48in./1219 mm 147/8 67 378 1702
30° 061/4 241/2 159 622
30° 12in./305 mm 113/4 34 298 864
30° 18in./457 mm 143/4 391/4 375 997
30° 36in./914 mm 233/4 547/8 603 1394
30° 48in./1219 mm 293/4 651/4 756 1657
RISE
OFFSET
Figure 4.5

19
Majestic • Ashland ASH50 Installation Manual • 4059-900 • Rev E • 04/19
Elbow Strap
30° or 15°
Elbow
Figure 4.6
Elbow Strap
1 per
Section
Figure 4.7
I. Offset Elbow Installation
A30°Elbow(measuredfromthevertical)isthelargest
thatcanbeusedinanoffset.A30°Elbowmaynotbe
combinedwithanotherElbowtomakeasteeperoffset
(e.g.two30°Elbowsarenotallowedtobeputtogetherto
forma60°elbow.).AvoidElbowsifpossible.Atotallyver-
ticalchimneyismoreefcient.WhenElbowsareneces-
sarytoavoidobstructionssuchasrafters,ridgepoles,or
joists,youareonlyallowedtouse2pairofElbowsinany
onechimneysystem.Horizontalrunsofchimneyviolate
buildingcodeandarenotallowed.
• Attachelbows
 Attach elbow to chimney section or other elbow by
mating the male and female ends with each other and
using four sheet metal screws provided.Attach one
elbowtothechimneysectionbelow,andalignitforthe
offset.Determinetherequiredoffsetlengthandattach
anappropriatelength(orlengths)ofchimneysection(s)
abovetheelbow.Attach the second elbow above the
chimneysectiontocompletetheoffset(Figure4.6).
• Secure offset
 Use an elbow strap to secure the offset. Secure the
elbowstrap’sbandtochimneyaroundtheupperportion
ofthetopelbow,thentightenthenutandboltuntilthe
clampisrm.Wraptheelbowstrapendoveranadjacent
joist or rafter and secure it with at least two 8-penny nails
ortwo#8,1-1/2”screws.Addadditionalelbowstraps
foreachsectionofchimneyintheoffset(Figure4.7).
Everychimneysectionintheoffsetmustbesupported.
Donotaddmorechimneysectionsuntiltheelbowsand
offset are supported. Be sure that the chimney remains
vertical.
Chase
Frame
Stabilizer
Plumbers
Tape
Install supplementary
support if height exceeds
50 ft or if required by
fireplace manufacturer
Each supplementary
support holds up to
25 ft. of chimney
Maintain 2 in. clearance
from chimney to framing
Figure 4.8
Figure 4.9
J. Supplementary Support & Stabilizer
Install a supplementary support if total chimney height
isgreaterthan50-feet,orifthereplacemanufacturer
requiresit.Ifadditionalsupportisneeded,installoneor
more supplementary supports which can each support 25-
feetofchimney(Fig.4.8).
• Clampthesupplementarysupportbandaroundthepipe
usingthenutandboltprovided,andanchorthesupport
tonearbybuildingframing.
• Alwaysmaintainthe2”clearancetocombustiblesfrom
the chimney pipe.A stabilizer is available and may
be required by some replace manufacturers to keep
the chimney vertical and help maintain clearances to
combustibleswithinachase.
• Clampthestabilizertothepipeusingthenutandbolt
provided, and secure legs to nearby framing using
plumber’stapeorguy-wires(Fig.4.9).
Note: The stabilizer does not support the weight of the
chimney, itis onlyused tokeepchimneycenteredwithin
a chase.

20 Majestic • Ashland ASH50 Installation Manual • 4059-900 • Rev E • 04/19
K. Install Attic Insulation Shield
Theatticinsulationshieldmustbeinstalledwherethe
chimneypassesintoanattic.Itspurposeistopreventde-
brisandinsulationfromgettingtooclosetothechimney.
Inatticareaswherethisshieldcannott,orisnotused
you must enclose the attic portion of the chimney in a
framed enclosure. If the chimney is fully enclosed through
theattic,anatticinsulationshieldisnotrequired.Install
theatticinsulationshieldasfollows:
• Removeanyinsulationfromatticooraroundtheframed
opening.
• Assemblechimneysectionsuntilatleast18inchesof
chimneyextendsabovetherestop.
• Sliptheatticinsulationshieldoverthechimneyuntilthe
basesitssquarelyontheframedopening(Figure4.10).
• Secure the attic insulation shield to the top of the framed
opening using at least two 8-penny nails or two #8,
1-1/2in.woodscrewsperside(Figure4.11).
• Wrapthecollaroftheatticinsulationshieldaroundthe
chimney and fasten it loosely. Slide the collar down
tomeettheatticinsulationshield.Tightentheboltsto
securethecollarinplace(Figure4.11).
• Combustiblematerialmaycomeintocontactwiththeattic
insulationshieldaslongastherequiredclearancesare
maintained to the chimney pipe.
Attic
Insulation
Shield
Firestop
Attic
Figure 4.10
Attic
Attic Shield
Collar
Firestop
Figure 4.11
L. Install Roof Radiation Shields
Roofradiationshieldsmustbeusedtoprovideprotection
forrooforchaseframingmembers.
Note: Roof radiation shields do not allow for a reduced
clearancetocombustibles.
Clearancetocombustiblesmustbeaminimumof2”
away from the chimney pipe.
• Install roof radiation shields at either the top of the chase
orwherethechimneypenetratestheroof,whicheveris
the top of the installation.
• Roofradiationshieldsarebuiltwitha1/2”airgapstandoff
fromthejoistface(Figure4.12).Thecornersoftheroof
radiationshieldsoverlapeachother toensureproper
position.
• Secure the roof radiation shields to the top of the framing
membersusingscrewsornailsinthecorners.
• Ifframingmembersarefurtherawayfromthechimney
than 2 in., center the roof radiation shield to the chimney
ontheframingmemberandsecureinplacewithscrews
or nails.
(4) Roof
Radiation
Shields
Chase
Enclosure
Figure 4.12
M. Attach Flashing
Forchaseenclosures,usethechasetopashing.The
chasetopashingallowsfora1-1/2in.clearancemain-
tainedfromthechimney(Figure4.14)andprovides
requiredventilationair.
• Chase top ashings (includes chase top collars and
spacingclips)areavailablefromyourHHTdealer.
• Additionalnon-combustiblestructuralsupportscanbe
eld-fabricatedtohelpsupportthechasetopashing
ifneeded,providedtheairventilationrequirementsare
maintained.SeeFigure4.15.
• Ifthechasetopashing(40in.x40in.)doesnotensure
theminimum1/2in.spacingandperimeterventilation
requirementsasshowninFigure4.13.,useachasetop
collarandeld-constructtheashingasneededforthe
chasedimensions.SkiptoField-Constructed Chase
Top Flashing.