IHP Comfortflame Shiloh42RWS User manual

WELCOME HOME TO WARMTH
TM
PFS
®
USC
SAVE THIS BOOK
This book is valuable. In addition to instructing you on how to install and maintain your appliance, it also contains
information that will enable you to obtain replacement parts or accessory items when needed. Keep it with your other
important papers.
INSTALLER: Leave this manual with the appliance.
CONSUMER: Retain this manual for future reference.
Installateur : Laissez cette notice avec l’appareil.
Consommateur : Conservez cette notice pour consultation ultérieure.
This wood burning fireplace complies with
UL127 CAN/ULC-S610-M87 standard as a
FACTORY BUILT FIREPLACE.
Ce foyer au bois est conforme aux UL 127 CAN/ULC-
S610-M87 norme comme une USINE CONSTRUITE
CHEMINÉE.
This fireplace is approved for use as a wood burning fireplace or for use with a vented gas log approved to ANSI
Z21.60 or Z21.84 standards or for use with a vent-free gas log heater approved to ANSI Z21.11.2 standard. AN
IHP hood must be installed when using a vent-free log heater (see Accessories, page 19).
FOR CANADA: The authority having jurisdiction
(such as the municipal building department, fire
department, etc.) should be contacted before
installation to determine the need to obtain a permit.
POUR LE CANADA: L’autorité compétente (comme le
service municipal du bâtiment, les pompiers, etc.) doit
être contacté avant l’installation afin de déterminer la
nécessité d’obtenir un permis.
This appliance may be installed in an aftermarket permanently located, manufactured home (USA only)
or mobile home, where not prohibited by local codes. This appliance is only for use with the type of gas indicated
on the rating plate.
This installation manual will enable you to obtain a safe, efficient and dependable installation of your fireplace
system. Please read and understand these instructions before beginning your installation.
Do not alter or modify the fireplace or its components under any circumstances. Any modification or alteration
of the fireplace system, including but not limited to the fireplace, chimney components and accessories, may
void the warranty, listings and approvals of this system and could result in an unsafe and potentially dangerous
installation.
IMPORTANT! TO ASSURE PROPER ALIGNMENT OF GLASS DOORS: INSTALL THIS FIREPLACE IN A SQUARE
AND PLUMB CONDITION, USING SHIMS AS NECESSARY AT SIDES AND/OR BOTTOM.
Installation and Operation Instructions
Comfort Flame™ Residential and
Outdoor Wood-Burning Fireplace
Model
P900574-00
P/N 900574-00 Rev. N/C 10/2015 Report No. F10-078
Shiloh42RWS

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Safety.............................................................................................2
Specifications.................................................................................4
Fireplace Installation ......................................................................5
Venting Installation ........................................................................7
Optional Gas Line Installation ......................................................13
Operation and Maintenance .........................................................14
Replacement Parts.......................................................................15
Technical Service .........................................................................15
Parts ............................................................................................16
Accessories..................................................................................18
Warranty ......................................................................................23
Thank you for your purchase. We appreciate your
business!
Please carefully read and follow all instructions in this manual. Pay
special attention to all warnings and safety information.
Following these safety, care, and operation instructions will help
ensure many years of dependable and enjoyable service from your
fireplace.
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Please read and understand these instructions before installing
or operating.
SAFETY
WARNING: Improper installation, adjustment,
alteration, service or maintenance can cause injury,
property damage or loss of life. Refer to this manual
for assistance or additional information. Consult a
qualified installer or local distributor.
IMPORTANT: Check local codes before installing this
fireplace.
Before beginning installation of this fireplace, read these instructions
through completely.
• ThisINNOVATIVEHEARTHPRODUCTS,LLC(IHP)replaceand
its components are safe when installed according to this installa-
tionmanual.UnlessyouuseIHPcomponents,whichhavebeen
designed and tested for the fireplace system, you may cause a fire
hazard.
• TheIHPwarrantywillbevoidedbyandIHPdisclaimsanyrespon-
sibility for the following actions.
a. Modification of the fireplace, components, doors, air inlet
system and damper control.
b. Use of any component part not manufactured or approved by
IHPincombinationwithanIHPreplacesystem.
Proper installation is the most important step in ensuring safe and
continuous operation of the fireplace. Consult the local building codes
as to the particular requirements concerned with the installation of
all factory built fireplaces.
WARNING: Do not install a fireplace insert in this
fireplace unless the manufacturer's instructions with
the insert specifically state this fireplace has been
tested for use with this insert.
NOTICE: The firebox canopy (hood) must not be modi-
fied or replaced with a canopy that may be provided
with the unvented decorative room heater.
TABLE OF CONTENTS
WARNING: Do not install a fireplace insert in this
box unless the manufacturer's instructions with the
insert specifically state this fireplace has been tested
for use with this insert.
FOR YOUR SAFETY
•Donotstoreorusegasolineoranyotherammable
vapors or liquids in the vicinity of this or any other
appliance.
•Duetohightemperatures,theapplianceshouldbe
located out of traffic and away from furniture and
draperies.
•Donotplaceclothingorotherammablematerials
on or near the appliance.
•Never leave children unattended when a re is
burning in the fireplace.
WARNING: Use solid wood or processed solid
fuel fire logs only. "Do not poke or stir the logs while
they are burning. Use only firelogs that have been
evaluated for the application in fireplace and refer to
firelog warnings and caution markings on packaging
prior to use."
This fireplace is not intended to be used as a sub-
stitute for a furnace to heat an entire home. Use for
supplemental heat only.
Overfiring of a fireplace is a condition where exces-
sive temperatures are reached, beyond the design
capabilitiesoftheappliance.Thedamagethatoccurs
from overfiring is not covered under the manufac-
turer’s limited warranty.

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900574-00N/C 3
SAFETY Continued
WARNING: CONTINUED OVERFIRING CAN PER-
MANENTLY DAMAGE YOUR FIREPLACE SYSTEM.
SOME EXAMPLES OF CONDITIONS THAT COULD
CAUSE OVERFIRING ARE:
• BURNINGQUANTITIESOFSCRAPLUMBER,PINE
BRANCHES, PAPER OR CARDBOARD BOXES
WHICHEXCEEDTHEVOLUMEOFTHENORMAL
LOGFIRE.
• BURNINGTRASH,CHEMICALSORCHEMICALLY
TREATEDCOMBUSTIBLES.
Disposal of Ashes
Ashes should be placed in a metal container with a
tight-fitting lid. The closed container of ashes should
be placed on a noncombustible floor or on the ground,
well away from all combustible materials, pending
final disposal. If the ashes are disposed of by burial
in soil or otherwise locally dispersed, they should be
retained in the closed container until all cinders have
thoroughly cooled.
WHEN USING THE DECORATIVE APPLIANCE, THE
FIREPLACE DAMPER MUST BE SET IN THE FULLY
OPEN POSITION.
Never use gasoline, gasoline-type lantern fuel, kero-
sene, charcoal lighter fluid, or similar liquids to start
or ’freshen up’ a fire in this fireplace. Keep all such
liquids well away from the fireplace while it is in use.
Use SOLID WOOD only for fuel. It is best to use dry
and well seasoned hardwood. Softwoods tend to burn
veryquickly.DONOTusetreatedwood,charcoal,coal,
trash,driftwoodorwoodsthathavebeendippedintar,
pitch, pine tar, creosote, etc. Wood products made
with synthetic binders, such as plywood, produce ab-
normally high temperatures and sputtering, smoking
fires. When burning artificial logs, please read and
follow the instructions provided by the manufacturer.
Never burn treated construction lumber or scraps.
These woods burn excessively hot and may contain
chemicals used to treat insects and fungus. When
burned,thesechemicalscanposeasignificanthazard.
WARNING: BURNING IMPROPER FUEL (I.E.
CHARCOAL) CAN RESULT IN CARBON MONOXIDE
POISONING, WHICH MAY LEAD TO DEATH!
Carbon Monoxide Poisoning – Early signs of carbon
monoxidepoisoningresemblethefluwithheadaches,
dizziness, or nausea. If you have these signs, get
fresh air at once! Have the appliance inspected by a
qualified service technician. Some people are more
affected by carbon monoxide than others. These
include pregnant women, people with heart or lung
disease or anemia, those under the influence of al-
cohol, and those at high altitudes.
Ventilation Requirements - Provide adequate air for
combustion. The fresh air requirements of this ap-
pliance must be met within the space where it will
be installed.
Smoke Detectors - Since there are always several
potential sources of fire in any home, we recommend
installing smoke detectors. If possible, install the
smoke detector in a hallway adjacent to the room (to
reduce the possibility of occasional false activation
fromtheheatproducedbytheappliance). Ifyourlocal
coderequiresasmokedetectorbeinstalledwithinthe
same room, you must follow the requirements of your
localcode.Check withyourlocal buildingdepartment
for requirements in your area.
Creosote – Formation and Need for Removal
Whenwoodis burnedslowly, itproduces tarandother
organicvapors,whichcombinewithexpelledmoisture
to form creosote. The creosote vapors condense in
the relatively cool chimney flue of a slow-burning
fire. As a result, creosote residue accumulates on
the flue lining. When ignited this creosote makes an
extremely hot fire.
The chimney shall be inspected at least twice a
year during the heating season to determine when a
creosotebuilduphasoccurred.Whencreosotehasac-
cumulated (1/8" [3 mm] or more) it shall be removed
to reduce the risk of a chimney fire.

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SPECIFICATIONS
WARNING: DO NOT INSTALL IN SLEEPING
ROOM OF MOBILE HOMES
CAUTION: THE STRUCTURAL INTEGRITY OF THE MANU-
FACTURED HOME FLOOR, WALL, AND CEILING/ROOF
MUST BE MAINTAINED
0" TO
BOTTOM
(LEFT SIDE ONLY)
OUTSIDE AIR
BACK AND
SIDES
3/4" AIR
SPACE
HEARTH EXTENSION
66" X 20" MINIMUM
12"
EACH SIDE
COMBUSTIBLE
WALL BOARD
TOP SPACERS
0" TO
1" AIRSPACE
TO COMBUSTIBLE
MATERIAL
NO COMBUSTIBLE
MATERIAL ON FACE
NO COMBUSTIBLE
MATERIAL BELOW
TOP SPACERS
GAS LINE
KNOCK OUT
AIR KIT
KNOCK OUTS
GAS LINE
STARTER
SECTION
8DM
PIPE
INNER DIA.
OUTER
DIA. 15"
KNOCK OUTS
ELECTRICAL
OUTLET
LEFT SIDE
RIGHT SIDE
PERPENDICULAR
NOT LESS
THAN 12" TO
SIDEWALL
41"
48"
42"
8"
39"
12"
48"
36"
24"
81/8"
10 5/8"
12 5/8"
10 5/8"
63/4"
14 1/4"
21/2"
29 1/2"
22 1/2"
11 3/4"
46 3/4"
11/2"
12 3/8"
5/8"
16 1/4"
81/8"
21/2"
SQUARE CHASE-TOP
TERMINATION
ROUND TOP TERMINATION

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900574-00N/C 5
FIREPLACE INSTALLATION
SELECTING LOCATION
To determine safest and most efficient location for fireplace, you
must take into consideration the following guidelines:
1. Locationmustallowforproperclearances(seeFigures1and2).
2. Consider a location where fireplace will not be affected by drafts,
air conditioning ducts, windows or doors.
3. A location that avoids cutting of joists or roof rafters will make
installation easier.
4. Anoutsideair kitis available withthis replace(seeOptional
Outside Air Kitonpage7).
MINIMUM CLEARANCE TO COMBUSTIBLES
Back and sides of fireplace 3/4" minimum*
Floor** 0" minimum
Perpendicular wall to opening 12" minimum
Top spacers 0" minimum
Mantel clearances see Mantels, page 6
Chimney outer pipe surface 1" minimum
** See step 2 of Framing
WARNING: DO NOT PACK REQUIRED AIR SPACES
WITH INSULATION OR OTHER MATERIALS.
Minimum/Maximum Chimney Height
The minimum height of the chimney, measured from the base of
the fireplace to the flue gas outlet of the termination, is 14.5 feet for
straight flue or a flue with one elbow set. The maximum distance
between elbows is 6 feet. For systems with two elbow sets, the
minimum height is 22 feet. The maximum height of any system is
50 feet. This measurement includes the fireplace, chimney sections
and the height of the termination assembly at the level of the flue
gasoutlet(seeFigure18,page12).
Minimum/Maximum Chimney Height for Outdoor Installation
The minimum height of the chimney, measured from the base of the
replacetotheuegasoutletofthetermination,is8feet(minimum
of4feetofchimneypipesectionsrequiredforoutdoorinstallation).
Figure 2 - Corner Installation
FRAMING
1. Frame opening for fireplace using dimensions shown in Figures
1 and 2.
Note: When the fireplace is framed, the header has to be turned
on the flat to maintain proper clearance.
2. If fireplace is to be installed directly on carpeting, tile or any
combustible material other than wood flooring, fireplace must
be installed upon a metal or wood panel extending full width and
depth of fireplace.
3. Set fireplace directly in front of this opening and slide unit back
until nailing flanges touch side framing.
4. Check level of fireplace and shim with sheet metal if necessary.
5. Before securing fireplace to prepared framing, ember protector
must be placed between hearth extension (not included) and
under bottom front edge of fireplace to protect against glowing
embers falling through. If fireplace is to be installed on a raised
platform,aZ-typeemberprotector(notincluded)mustbefabri-
catedtotyourrequiredplatformheight.Emberprotectorshould
extend under fireplace a minimum of 1 1/2". Ember protector
shouldbemadeofgalvanizedsheetmetal(28gaugeminimum)
to prevent corrosion.
6. Using screws or nails, secure fireplace to framing through flanges
located on sides of fireplace.
28"
Maintain 3/4"
Clearance at
Sides and
Back of
Fireplace
59 3/8"
19 1/2"
83 7/8"
Figure 1 - Framing Dimensions
23 1/2"
49 3/4"
47 1/4"
2x4
Header
Turned
Flat

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FIREPLACE INSTALLATION Continued
Figure 3 - Hearth Extension
Fireplace Front
Fireplace Front
Raised Hearth
Fireplace Front
Elevated
Seal Gap
Seal Gap
Ember Protector
Ember Protector
Ember Protector
Hearth
Extension
HearthExtension,NoncirculatingModels
WARNING: Hearth extension is to be installed
only as shown in Figure 3.
FIREBOX
SAFE ZONE
Top View of Fireplace
Min. 12" from
Perpendicular Side Wall
3"
2" Max.
33°
8"
MANTELS
Amantelmaybeinstalledifdesired(seeFigures4and5).Woodwork
such as wood trims, mantels or any other combustible material
projecting from front face, must not be placed within 12" of fireplace
opening and within 9" of top louver opening. Combustible materials
above 12" and projecting more than 1 1/2" from fireplace must not
beplacedlessthan12"fromtopopeningofreplace(NFPA211,
Section-ClearancefromCombustibleMaterial).
Mantels or any other combustible material may come up to side edge
of black metal face of fireplace if projection from front face falls within
limits shown in Figure 4.
Figure 4 - Mantel Clearances to Combustible Material
12 1/4" Ref.
6"
Ref.
15" Min.
12" Min.
11/2" Max.
3" Nom.
33°
Combustible
Material
Safe
Zone for
Projection of
Combustible
Materials
Fireplace Opening
Non-Combustible
Materials Below
Top Spacer
Upper
Section of
Fireplace
DRAIN PAN (DP42)
For outdoor installations, the fireplace enclosure must allow for
adequate drainage and fresh air ventilation. It is recommended that
a sealed, corrosion resistant catch pan with provision for drainage
beinstalledunderthereplacewithinthereplaceenclosure(see
Accessories,page19).
HEARTH EXTENSION
A hearth extension projecting a minimum of 20" in front of and a
minimum of 12" beyond each side of fireplace opening is required
to protect combustible floor construction in front of fireplace. Fab-
ricate a hearth extension using a material which meets the following
specifications: a layer of noncombustible, inorganic material having
athermalconductivityofk=.84BTUIN/FT2HR°F(orless)at1"
thick. For example, if material selected has a k factor of 0.25, such
as glass fiber, the following formula would apply:
0.25 x 1.0" = 0.30" thickness required
0.84
Thermal conductivity "k" of materials can be obtained from manu-
facturer or supplier of noncombustible material. If hearth extension
is to be covered, use noncombustible material such as tile, slate,
brick, concrete, metal, glass, marble, stone, etc. Provide a means to
prevent hearth extension from shifting and seal gap between fireplace
frame and hearth extension with a non-combustible material such
assand-cementgrout(seeFigure3).

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900574-00N/C 7
Figure 5- Outside Air Kit
Secure to Collars with Metal Tape, Screws
or Straps (Min. of 1/4" x 20" in size)
Air Inlet
Location
Must Allow
For Bushes
or Snow
Vent Hood
Required for
Wall Installation
Air Inlet
Eyebrow
Vented Crawl Space
(Check Local Codes
Before Installing in a
Vented Crawl Space)
VENTING INSTALLATION
OPTIONAL OUTSIDE AIR KIT (MODEL AK4/AK4F)
Installation of outside air kit should be performed during rough fram-
ing of fireplace due to the nature of it's location. Outside combustion
airisaccessedthroughaventedcrawlspace(AK4F)orthrougha
sidewall(AK4).SeeFigure5forinstructionofoperatingairkit.
CAUTION: Combustion air inlet ducts shall not
terminate in attic or garage space.
The maximum height for the air vent can not exceed
3 feet below the flue gas outlet of the termination.
CHIMNEY PIPE
WARNING: Label part number 900599-01 must
be applied by the installer to all chimney pipe
sections but is not required on sections that will
be visible after the installation is complete. Label
must wrap around the circumference of the pipe.
See accessories, page 19 for Kit F2659.
AnIHPchimneysystemconsistsof12",18",24",36"and48"snap-
lock, double-wall pipe segments, planned for maximum adaptability
to individual site requirements. Actual lengths gained after fitting
overlapsmustbetakenintoconsideration(linealgain)andaregiven
inlinealgainchart(seeFigure6).
Lineal gain is actual measurable length of a part after two or more
parts are connected.
Figure 6 - Lineal Gain
Hemmed
End
8" Stainless
Inner Pipe
12 3/8"
Galvanized
Outer Pipe
WARNING: The opening in collar around chimney
at top of fireplace must not be obstructed. Never use
blown insulation to fill chimney enclosure.
LINEALGAIN
PARTNO. DESCRIPTION GAIN
42" Fireplace 45"
SS-8DM Starter Section 19''
12-8DM
12-8HT Pipe Section 10 5/8"
18-8DM
18-8HT Pipe Section 16 5/8"
24-8DM
24-8HT Pipe Section 23 5/8"
36-8DM
36-8HT Pipe Section 34 5/8"
48-8DM
48-8HT Pipe Section 46 5/8"
RT-8DM Round Termination 6 7/8"*
RTL-8DM Round Termination 7 3/4"*
RLT-8DM Round Termination 7 1/2"*
RTT-8DM Round Termination
with Slip Section
6 7/8" to
23 1/8"*
RTTL-8DM Round Termination
with Slip Section
8 1/2" to
21 1/2"*
RLTT-8DM Round Termination
with Slip Section
7 1/2" to
21 1/4"*
ET-8DM Square Chase-Top 12"*
ETO-8DM Square Chase-Top
with Mesh 12"*
ETL-8DM Square Chase-Top
with Slip Section 7" to 15"*
ETLO-8DM
Square Chase-Top
with Mesh & Slip
Section
12" to
25 1/2"*
* The lineal gain for the terminations is
measured to the ue gas outlet height.

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8
VENTING INSTALLATION Continued
ASSEMBLY AND INSTALLATION OF DOUBLE WALL CHIMNEY
SYSTEM
SS-8DM starter section must be installed first.
Eachdoublewallchimneysectionconsistsofagalvanizedouter
pipe, a stainless steel inner flue pipe and a wire spacer. Pipe sections
must be assembled independently as chimney is installed. When
connecting chimney directly to fireplace, inner flue pipe section
must be installed first with lanced side up. Outer pipe section can
then be installed over flue pipe section with hemmed end up. Press
down on each pipe section until lances securely engage hem on
fireplace starter. Wire will assure proper spacing between inner
and outer pipe sections.
Note:ForCanada,usechimneypartsdesignatedHT.
Opening in collar around chimney at top of
fireplace must not be obstructed. Never use blown
insulation to fill chimney enclosure.
Continue to assemble chimney sections as outlined, making sure
that both inner and outer pipe sections are locked together. When
installing double wall snap-lock chimney together, it is important to
assure joint between chimney sections is locked. Check by pulling
chimney upward after locking. Chimney will not come apart if properly
locked. It is not necessary to add screws to keep chimney together
(exception-seeFigure7).
The height of a vertical chimney pipe supported ONLY by the
fireplace, must not exceed 20 feet. Chimney heights above 20 feet
must be supported.
USING ELBOW OFFSET 30E-12DMO-8DMR
To clear overhead obstructions, you may offset your chimney system
using 30E-12DMO-8DMR30°Offset/returnelbow.
A section or sections of chimney may be used between offsets and
return elbow. Transition pipe must be used after elbow offset is
attached.
1. To achieve desired offset, you may install combinations of 12",
18",24",36"and48"lengthofdoublewallpipe(seeoffsetchart).
Note: For systems with 2 elbow sets, minimum height is 22 feet.
Maximum height for any system is 50 feet.
2. Chimney weight above offset rests on return elbow. Straps must
besecurelynailedtoraftersorjoists(seeFigure9detailsAand
B,page9).
3. Maximumlengthofpipebetweensupports(returnelbowor12S-
8DM)is6'ofanglerun.Maximumoftwo6'anglerunsections
perchimneysystem(seeFigure8,page9).
4. All pipe connections between offset and return must be secured
withtwoscrewsonouterpipeonly(seeFigure7).Donotpen-
etrate inner stainless.
Figure 7 - Elbow Offset
OFFSETCHARTWITHTRANSITIONPIPE
OFFSET RISE OFFSET/
RETURN
ELBOW
TRANSITION
PIPE
CHIMNEYLENGTH
AB 12" 18" 36" 48"
13 3/4" 32 1/2" 1 1
19" 41" 1 1 1 1
22" 46 3/4" 1 1 1
24 1/2" 50 3/4" 1 1 2
27 1/2" 56 1 1 1 1
30 1/4" 61 1 1 2
31 62 1/2" 1 1 1
32 1/2" 65" 1 1 2 1
35 1/2" 70 1/4" 1 1 1 2
36 1/4" 71 1/2" 1 1 1 1
37 72 3/4" 1 1 1
38 1/2" 75 1/2" 1 1 3
39 1/4" 76 3/4" 1 1 1 1
41 1/2" 80 1/2" 1 1 2 1
42 1/4" 81 3/4" 1 1 1 1
44 1/2" 85 3/4" 1 1 1 1 1
45 1/4" 87" 1 1 1 1
47 1/2" 91" 1 1 2 1
48 1/4" 92 1/4" 1 1 2
49 3/4" 94 3/4" 1 1 2 1 1
52" 98 3/4" 1 1 1 4
53 1/2" 101 1/4" 1 1 1 2
54 1/4" 102 3/4" 1 1 1 1
55 3/4" 105 1/4" 1 1 3 1
56 1/2" 1061/2" 1 1 1 2
58 3/4" 110 1/2" 1 1 2 2
59 1/2"111 3/4" 1 1 1 1 1
60 1/4" 113" 1 1 2
61 3/4" 115 3/4" 1 1 1 1 2
64 3/4" 120 3/4" 1 1 2 2
65 1/2" 122 1/4" 1 1 1 2
67" 124 3/4" 1 1 2 1 2
B
A
Screws

Comfortflame.US.com
900574-00N/C 9
Figure 9 - Ceiling Support Pipe 12S-8DM
2" Min.
Straps Straps
Straps
Straps
Detail A
Return Elbow
Detail B
Angle
Firestop
See Detail A
See Detail B
Ceiling Support
Pipe 12S-8DM
VENTING INSTALLATION Continued
Figure 8 - Typical Offset Installation
30E-8DM
Return Elbow 30E-8DM
Return Elbow
30E-8DM
Offset Elbow 30E-8DM
Offset Elbow
30E-12DMO-8DMR
Offset Elbow
30E-12DMO-8DMR
Offset Elbow
30E-12DMO-8DMR
Offset Elbow
30E-12DMO-8DMR
Return Elbow
30E-12DMO-8DMR
Return Elbow
30E-12DMO-8DMR
Return Elbow
Starter
Section
Starter
Section
Starter
Section
6' Max.
8 DM Pipe
8 DM Pipe
6' Max.
6' Max.
6' Max.
6' Max.
6' Max.
Ceiling
Support Pipe
12S-8DM
ABC

Comfortflame.US.com 900574-00N/C
10
VENTING INSTALLATION Continued
FIRESTOP SPACERS (3600FS-8DM-1)
Firestop spacers are required at each point where chimney penetrates
a floor space. Their purpose is to establish and maintain required
clearance between chimney and combustible materials. When pipe
passes through a framed opening into a living space above, firestop
must be placed onto ceiling from below as shown in Figure 10.
They also provide complete separation from one floor space to an-
other or attic space as required by most codes. When double wall
pipe passes through a framed opening into an attic space, firestop
must be placed into an attic floor as shown in Figure 11.
Figure 10 - Firestop Spacer with Living Space Above Ceiling
Figure 11 - Firestop Spacer with Attic Space Above Ceiling
PENETRATING ROOF
To maintain a 1" clearance to pipe on a roof with a pitch, a rectangular
opening must be cut.
1. Determine center point where pipe will penetrate the roof.
2. Determine center point of the roof. Pitch is the distance the roof
drops over a given span, usually 12". A 6/12 pitch means that the
roof drops 6" for each 12" measure horizontally down from roof
rafters.
3. Useroofopeningchart(Figure12,page11)todeterminecorrect
opening length and flashing required.
4. Remove shingles around opening measured. Cut out this section.
5. Add next sections of pipe until end penetrates roof line. Check to see
thatproperclearancesaremaintained.Extendchimneybyadding
sections of double wall pipe until pipe is minimum of 30" above
highest point of roof cutout. Termination and chimney must extend
a minimum of 36" above highest point where it passes through
roof.
Existing
Ceiling
Frame
Firestop
Spacer
Screws or
Staples
(Min. of 8)
Firestop
Spacer
Screws or Staples
(Min. of 8)
Existing
Ceiling
Frame
IMPORTANT NOTICE
When penetrating a ceiling into an attic, a firestop thimble
(38FST or FST30) is required to avoid intrusion by insulation
and recommended to negotiate a joist (see Figure 11a).
Figure 11a - Firestop Thimble
Thimble
38FST or
FST30
Firestop