Heatilator BIR50-B User manual

1Heatilator • Birmingham BIR50-B Installation Manual • 4059-701 • Rev B • 2/6/13
Installation and service of this fi replace should be
performed by qualifi ed personnel. Hearth & Home
Technologies recommends NFI certifi ed profes-
sionals, or technicians supervised by an
NFI certifi ed professional.
WOODBURNING FIREPLACE
Fire Risk.
WARNING
For use with solid wood fuel only.
Other fuels may overfire and generate poisonous
gases (i.e. carbon monoxide).
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
fi replace.
• Alert children and adults to hazards of high temperatures.
High temperatures may ignite clothing or other flammable
materials.
• Keep clothing, furniture, draperies and other fl ammable
materials away.
INSTALLER: Leave this manual with party responsible for use and operation.
OWNER: Retain this manual for future reference.
BIR50-B
NOTICE: DO NOT discard this manual!
•DO NOT store or use gasoline or other fl am-
mable vapors and liquids in the vicinity of this
or any other appliance.
• DO NOT overfi re. Overfi ring will void your
warranty.
• Comply with all minimum clearances to com-
bustibles as specifi ed. Failure to comply may
cause house fi re.
WARNING: If the information in these
instructions is not followed exactly, a fire
or explosion may result causing property
damage, personal injury, or death.

2 Heatilator • Birmingham BIR50-B Installation Manual • 4059-701 • Rev B • 2/6/13
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 fi replace or to property.
Table of Contents
1 Product Specific & Important Safety Information
A. Appliance Certifi 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/Traditional 33
C. Install Side Molded Brick Panel/Traditional 33
D. Install Back Molded Brick Panel/Herringbone 34
E. Install Side Molded Brick Panel/Herringbone 34
F. Install Screens 34
G. Install Mortar (Optional) 34
H. Grate 34
I. Gas Log/Lighter Provision 35
J. Wood Burning Inserts 35
8 Reference Materials
A. Chimney Components 36
B. Optional Components 36

3Heatilator • Birmingham BIR50-B Installation Manual • 4059-701 • Rev B • 2/6/13
Customer:
Lot/Address
Model (circle one): BIR50-B
YES IF NO, WHY?
Attic insulation shield installed.
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
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
-
704
•
Rev B
•
2
-
6
-
13
Protective hearth strips and hearth extension installed per manual requirements.
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
(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.
________________________________________________________________________________________________________
________________________________________________________________________________________________________
Finishing Section 6 (Pg. 27)

4 Heatilator • Birmingham BIR50-B Installation Manual • 4059-701 • Rev B • 2/6/13
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 fireplace
• modify fireplace
• install other than as instructed by Hearth & Home
Technologies
• operate the fireplace without fully assembling all
components
• overfire
• install unvented gas log sets
• 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 qualified
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 fi bers - Plastic
- Plywood/OSB - Sheet rock (drywall)
• Any material that can ignite and burn; fl ame proofed or
not, plastered or un-plastered
1 Product Specific & Important Safety Information
A. Appliance Certification
This fi 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 fi 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 fi replace has been tested and listed for use with
the optional components specifi 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 fi replace installation.
Heatilator is a registered trademark of Hearth & Home
Technologies.
►

5Heatilator • Birmingham BIR50-B Installation Manual • 4059-701 • Rev B • 2/6/13
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
NOTICE:
• Illustrations and photos reflect
typical installations and are for
design purposes only.
• Illustrations/diagrams are not drawn
to scale.
• Actual product may vary from
pictures in manual.
►

6 Heatilator • Birmingham BIR50-B Installation Manual • 4059-701 • Rev B • 2/6/13
A
F
D
BC
5/8 in. (16 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
BIR-50
Figure 2.2 Fireplace Locations
NOTICE:
• Illustrations and photos reflect 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
a minimum 1-1/2 in. air clearance to the sides of
the fireplace assembly must be maintained.
Chimney sections at any level require a 2 in. mini-
mum 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, fire
offi cials or authorities having jurisdiction over restrictions,
installation inspection and permits.
1. Selecting Fireplace Locations
This fi 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 fi replace in a basement, near frequently
opened doors, central heat outlets or returns, or other
locations of considerable air movement can affect the
performance.
Outside air must be used for combustion. This fi replace-
comes equipped with an outside air inlet to feed combus-
tion air from outside the home, along with an outside air
termination cap; the rigid metal duct is required but not
supplied. Consideration should be given to these factors
before deciding on a location.

7Heatilator • Birmingham BIR50-B Installation Manual • 4059-701 • Rev B • 2/6/13
2. Locating Fireplace & Chimney
Location of the fi 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 fi re.
• 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 fi replace location relative to fl oor and ceiling
and attic joists.
• Take into consideration the termination requirements in
Section 4.
Recommended
Location
Marginal
Location
Location
Not
Recommended
Recommended
Location
Location NOT
Recommended
Multi-level Roofs
Windward
Leeward
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 fi replace.
• Avoid installing the fi 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.

8 Heatilator • Birmingham BIR50-B Installation Manual • 4059-701 • Rev B • 2/6/13
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 fi re-
place dry.
• Remove fi 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 benefit.
E. Fireplace System Requirements
The Heatilator fi replace system requirements consist of
the following:
• Fireplace
- Molded brick panels (hearth panel Included with
fi replace, side and back panels sold separately)
- Firescreen (included with fi replace)
- Hearth Extension (sold separately)
- Grate (included with fi replace)
• Outside Air System
- Air Inlet Hood (included with fi replace)
- Flex (required, sold separately)
• Chimney System
- Attic Insulation Shield (sold separately)
- Chimney termination cap (sold separately)
• Non-combustible fi nish material

9Heatilator • Birmingham BIR50-B Installation Manual • 4059-701 • Rev B • 2/6/13
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
Figure 3.1 Fireplace Dimensions

10 Heatilator • Birmingham BIR50-B Installation Manual • 4059-701 • Rev B • 2/6/13
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 specifi ed in Figure 3.2. DO NOT pack
required air spaces with insulation or other materials.
Framing or finishing material used on the front of, or in
front of, the fireplace closer than the minimums listed must
be constucted entirely of non-combustible materials (i.e.,
steel studs, concrete board, etc.). Failure to comply may
cause fire.
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)

11Heatilator • Birmingham BIR50-B Installation Manual • 4059-701 • Rev B • 2/6/13
C. Construct the Chase
A chase is a vertical boxlike structure built to enclose the
fi 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 fi restops/
attic shields at each fl oor of the chase or every 10 ft (3048
mm) of clear space to control spread of fi re.
Walls, ceiling, base plate and cantilever fl oor at the fi rst
level of the chase should be insulated (see Figure 3.3.)
Vapor and air infi 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 fi 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 fi restop spacer and attic insulation
shield should be installed in an insulated false ceiling
at the 8 ft. (2438 mm) level above the fi 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 fi replace.
Three examples of chase applications are shown in Fig-
ure 3.4.
WARNING! You must install false ceilings and ceil-
ing firestops at each floor of the chase or every 10 ft
(3.05 m) to control spread of fire.
WARNING! Risk of Fire! DO NOT seal area between fire
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 other
materials surrounding the chimney system.
• Insulation and other materials must be firmly 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 fireplace or chimney.
• Failure to prevent contact between insulation or other
materials and chimney system may cause overheating
and fire.

12 Heatilator • Birmingham BIR50-B Installation Manual • 4059-701 • Rev B • 2/6/13
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 specified.
• A minimum 1-1/2 in. (38 mm) air clearance must be
maintained at the back and 1-1/2 in. (38 mm) to the
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
2 in. (51 mm)
min. air space
clearance
from chimney.
Note: Framing must be
extended straight up,
all the way to the ceiling.
Header MUST NOT be notched!
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
E
A B * C ** D E min.
in. 61 7/8 28 1/2 74 1/2 12 21
mm 1572 724 1892 305 533
Model #
** Adjust header height for raised floor under fireplace.
BIR-50
* If interior of chase will be drywalled, add the thickness to this meaurement.
The header cannot be positioned until
after the fireplace assembly is in place.
Figure 3.5 Framing the Fireplace
D. Frame the Fireplace
NOTICE: Hearth extension design must be determined
before installation of fi replace.
If the fi replace is placed on the fl oor, the maximum height
of a fi nished raised hearth is 3-3/4”, if you want a higher
raised hearth the fi replace must be placed on a platform.
The BIR50-B Fireplace will fi t a framed opening height of
74-1/2 in. (1892 mm) tall and 61-7/8 in. (1572 mm) wide.
Figure 3.5 shows a typical framing (using 2 x 4 lumber) of
the fi replace, assuming combustible materials are used.
All required clearances to combustibles around the fi re-
place must be adhered to. See Figure 3.2. Any framing
across the top of the fi replace must be above the level of
the top standoffs. (No recess above standoffs.)
The fi nished cavity depth must be no less than 28-1/2 in.
(673 mm) from the fi nished backwall to the outside of front
wall framing. Framing must extend straight up all the way
to the ceiling.

13Heatilator • Birmingham BIR50-B Installation Manual • 4059-701 • Rev B • 2/6/13
E. Secure and Level the Fireplace
This fi replace may be placed on either a combustible or
noncombustible continuous fl at surface. Slide the fi replace
into position. Be sure to provide the minimum 1-1/2 in.
air clearance at the sides and 1-1/2 in. at the back of the
fi replace.
The fi replace should be positioned so the face of the non-
combustible material on the fi replace will be fl ush with the
face of the drywall on the walls.
Level the fi 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)
T
op p
i
ece must over
l
ap
bottom piece
Nail or screw metal strips in place.
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 fi replace.
• Slide each metal strip 2 in. (51 mm) under front edge of
fi replace.
• Overlap strips in the middle of fi replace opening by 1 in.
(25 mm) minimum.
• Metal strips must extend beyond the front and sides
of the fi 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 fi 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 flooring.
WARNING! Risk of fire! High temperatures, sparks,
embers or other burning material falling from the
fireplace may ignite flooring or concealed combustible
surfaces.
• Protective metal hearth strips MUST be installed.
• Hearth extensions MUST be installed exactly as
specified.
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 fireplace assembly.

14 Heatilator • Birmingham BIR50-B Installation Manual • 4059-701 • Rev B • 2/6/13
3 ft min. from
top of uppermost
chimney section
to air inlet.
Outside air installed
on both sides (right
side not shown)
G. Outside Air Kit
Outside air kits must be used for combustion. Hearth &
Home Technologies recommends you utilize the shortest
duct run to optimize the performance of the outside air kit.
The outside air kit inlets 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.
Refer to Figures 3.8 and 3.9 when placing the outside air
inlet.
The outside air kits are installed on the both sides of the
fi replace.
• Cut a 6 in. (152 mm) hole in outside wall to accommodate
air piping.
• Use 6 in. (152 mm) metal fl ex or rigid piping (not supplied)
to directly connect outside air to fi replace intake. Insulate
the pipe to prevent frost condensation.
• Use the supplied termination cap.
• Seal between the wall and the pipe with silicone to
prevent moisture penetration and air leaks.
• Seal between the termination cap and the house with
silicone to prevent air infi 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, floor or ceiling cavity, or
enclosed spaces such as an attic or garage.
•DO NOT place outside air hood close to exhaust vents or
chimneys. Fumes or odor could be drawn into the room
through the fireplace.
• Locate outside air inlet to prevent blockage from leaves,
snow/ice, or other debris. Blockages could cause
combustion air starvation.
Figure 3.8 Outside Air Inlet Locations
Outlet blocked by
snow, leaves, etc.
NO
Garage or
combustible
liquids storage
NO
Attic space
NO
Outlet placed
higher than 3 ft
below the
termination cap
NO
Use only duct materials
specified by manufacturer
Figure 3.9 Outside Air Installation
Outside air in-
stalled on both
sides (right side
not shown)
►

15Heatilator • Birmingham BIR50-B Installation Manual • 4059-701 • Rev B • 2/6/13
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 fi replace.
WARNING! Risk of Fire! You must maintain 2 in. (51 mm)
air space clearance to insulation and other combustible
materials around the chimney system. Failure to do so
may cause overheating and fire.
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 stabiliz-
ers
25 7.62
• Maximum unsupported chimney length be-
tween the offset and return
6 1.83
• Maximum unsupported chimney height above
the fi replace
25 7.62
• Maximum unsupported chimney above roof 6 1.83
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-VC - 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 refl ect effective height.
Table 4.1

16 Heatilator • Birmingham BIR50-B Installation Manual • 4059-701 • Rev B • 2/6/13
(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 fi replace assembly to
the approximate location of the bottom of the termination
cap.
• Subtract the effective height of the fi 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 fi restop whenever the chimney penetrates
afl oor/ceiling.
NOTICE: A maximum of two offset and return may be
used.
CAUTION! Risk of Fire and/or Asphyxiation! DO
NOT connect this fireplace to a chimney flue servicing
another appliance. Do NOT connect to any air distribu-
tion duct or system. These actions could cause over-
heating/fire in the chimney flue, or release of exhaust
fumes into the living areas.

17Heatilator • Birmingham BIR50-B Installation Manual • 4059-701 • Rev B • 2/6/13
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 fi 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, effi 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 modifi 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 modifi 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
fi replace’s fl 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 fl oor level above the fi replace
(Figure 4.1). These openings are to hold the fi 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
specifi 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 fi restop is required on each fl oor penetration in multisto-
ry installation. Building Codes require a fi restop at every
fl 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 fi restop is not installed where the chimney pen-
etrates through the roof.
• The fi restop is installed on the underside of the ceiling/
fl 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 Heatilator • Birmingham BIR50-B Installation Manual • 4059-701 • Rev B • 2/6/13
G. Assemble Chimney Sections
• Attach the fi rst chimney section or offset onto
the top of the fi replace (Figure 4.3). Sheet metal
screws are required to connect chimney section
to the fi 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! Rish of Fire! DO NOT use offset/returns greater than
30 ft. Chimney draft will be restricted and could cause overheating
and fire.
• 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° 0 2 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° 0 6 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

19Heatilator • Birmingham BIR50-B Installation Manual • 4059-701 • Rev B • 2/6/13
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 effi 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 ating
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 fi 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 fi 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 fi 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 Heatilator • Birmingham BIR50-B Installation Manual • 4059-701 • Rev B • 2/6/13
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 fi 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 fl oor around the framed
opening.
• Assemble chimney sections until at least 18 inches of
chimney extends above the fi 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).
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 fl ashing. The
chase top fl ashing allows for a 1-1/2 in. clearance main-
tained from the chimney (Figure 4.14) and provides
required ventilation air.
• Chase top fl ashings (includes chase top collars and
spacing clips) are available from your HHT dealer.
• Additional non-combustible structural supports can be
fi eld-fabricated to help support the chase top fl ashing
if needed, provided the air ventilation requirements are
maintained. See Figure 4.15.
• If the chase top fl 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 fi eld-construct the fl ashing as needed for the
chase dimensions. Skip to Field-Constructed Chase
Top Flashing.