Osburn MATRIX 2700 INSERT User manual

2.5 g/h
<
≤
EPA
READ AND KEEP THIS MANUAL FOR REFERENCE
CONTACT LOCAL BUILDING OR FIRE OFFICIALS ABOUT RESTRICTIONS AND INSTALLATION INSPECTION REQUIREMENTS IN
THE AREA.
READ THIS ENTIRE MANUAL BEFORE INSTALLATION AND USE OF THIS WOOD INSERT. FAILURE TO FOLLOW THESE
INSTRUCTIONS COULD RESULT IN PROPERTY DAMAGE, BODILY INJURY OR EVEN DEATH.
US Environmental Protection
Agency phase II certified
wood insert compliant with
2020 cord wood standard.
Safety tested according to
ULC S628, UL 1482 and
UL 737 by an accredited
laboratory.
Printed in Canada
2019-08-06
45999A
ENGLISH
Installation and Operation Manual
MATRIX 2700 INSERT
(OB02700)

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As one of North America’s
largest and most respected
wood stove and fireplace
manufacturers, Stove Builder
International takes pride in the
quality and performance of all
its products.
The following pages provide
general advice on wood
heating, detailed instructions
for safe and effective
installation, and guidance
on how to get the best
performance from this insert.
It is highly recommended
that this wood burning hearth
product be installed and
serviced by professionals who
are certified by NFI (National
Fireplace Institute®) or CSIA
(Chimney Safety Institute
of America) in the United
States or in Canada by WETT
(Wood Energy Technology
Transfer) or in Quebec
by APC (Association des
Professionnels du Chauffage).
Contact local building or fire
officials about restrictions
and installation inspection
requirements in the area.
A building permit might be
required for the installation of
this insert and the chimney
that it is connected to. It
is also recommended to
inform your home insurance
company.
Please read this entire manual
before installing and using this
insert.
A primary alternative heat
source should be available in
the home. This heating unit
may serve as a supplementary
heat source. The manufacturer
cannot be responsible for
additional heating costs
associated with the use of an
alternative heat source.
THANK YOU FOR CHOOSING
THIS WOOD INSERT.
If this insert is not
installed properly,
combustible materials
near it may overheat
and catch fire.
To reduce the
risk of fire, follow
the installation
instructions in this
manual.
ONLINE WARRANTY REGISTRATION
If the unit requires repairs during the warranty period, proof of purchase must be provided. The
purchase invoice must be kept. The date indicated on it establishes the warranty period. If it
cannot be provided, the warranty period will be determined by the date of manufacture of the
product. It is also highly recommended to register the warranty online at
https://www.osburn-mfg.com/en/warranty/warranty-registration/
Registering the warranty will help to quickly find the information needed on the unit.

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TABLE OF CONTENTS
PART A - OPERATION AND MAINTENANCE .......................................................................... 7
1. Safety Information............................................................................................................... 7
2. General Information ............................................................................................................ 8
2.1 Performances..............................................................................................................8
2.2 Specifications..............................................................................................................9
2.3 Dimensions ..............................................................................................................10
2.4 Materials ...................................................................................................................12
2.5 Zone Heating.............................................................................................................12
2.6 Emissions and Efficiency ............................................................................................13
3. Fuel .................................................................................................................................... 13
3.1 Tree Species .............................................................................................................13
3.2 Log Length................................................................................................................14
3.3 Piece Size .................................................................................................................14
3.4 Compressed Wood Logs............................................................................................14
3.5 Drying Time...............................................................................................................14
4. Operating the Insert .......................................................................................................... 15
4.1 Blower operation .......................................................................................................16
4.2 Fire Screen................................................................................................................16
5. Burning Wood Efficiently .................................................................................................. 16
5.1 First Use ...................................................................................................................16
5.2 Lighting Fires.............................................................................................................17
5.3 Combustion Cycles....................................................................................................18
5.4 Rekindling a Fire........................................................................................................18
5.5 Removing Ashes........................................................................................................19
5.6 Air Intake Control ......................................................................................................19
5.7 Fire Types .................................................................................................................20
6. Maintenance...................................................................................................................... 21
6.1 Cleaning and Painting ................................................................................................21
6.2 Refractory Material and Baffle.....................................................................................22
6.3 Glass Door................................................................................................................22
6.4 Door .........................................................................................................................23
6.5 Exhaust System.........................................................................................................24
PART B - INSTALLATION........................................................................................................ 26
7. Masonry Fireplace Requirements .................................................................................... 26
7.1 Fireplace and Chimney Condition................................................................................26
7.2 Chimney Caps...........................................................................................................26
7.3 Adjacent Combustibles ..............................................................................................26
7.4 Opening Size.............................................................................................................26
7.5 Masonry Fireplace Throat Damper ..............................................................................26
8. Safety Information and Standards ................................................................................... 27
8.1 Regulations Covering Insert Installation .......................................................................27

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Dealer:
Installer:
Phone Number:
Serial Number:
9. Clearances to Combustible Material................................................................................ 27
9.1 Installation of a Combustible Mantel Shelf ...................................................................28
9.2 Floor Protection.........................................................................................................28
9.3 Minimum Masonry Opening and Clearances to Combustibles .......................................32
10.The Venting System .......................................................................................................... 33
10.1 General ....................................................................................................................33
10.2 Block-off Plate...........................................................................................................33
10.3 Suitable Chimneys .....................................................................................................33
10.4 Chimney Liner Installation...........................................................................................34
10.5 Liner Connection .......................................................................................................34
10.6 Minimum Chimney Height...........................................................................................36
10.7 Chimney Location......................................................................................................36
10.8 Supply of Combustion Air...........................................................................................37
Appendix 1: Connecting the Blower with a BX Wire ............................................................... 38
Appendix 2: Faceplate Decorative Panel Installation.............................................................. 41
Appendix 3: Faceplate Installation ........................................................................................... 42
Appendix 4: Door Overlay Installation...................................................................................... 43
Appendix 5: Optional Fresh Air Intake Kit Installation............................................................. 44
Appendix 6: Optional Fire Screen Installation.......................................................................... 45
Appendix 7: Air Tubes and Baffle Installation .......................................................................... 46
Appendix 8: Refractory Panels Replacement .......................................................................... 48
Appendix 9: Blower Replacement ............................................................................................ 49
Appendix 10: Removal Instructions.......................................................................................... 51
Appendix 11: Exploded Diagram and Parts List...................................................................... 52
OSBURN Limited Lifetime Warranty ..................................................................................... 56

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CERTIFICATION PLATE

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PART A - OPERATION AND MAINTENANCE
1. Safety Information
• This insert has been tested for use with an open door in conjunction with a fire screen, sold
separately. The door may be opened, or fire screen removed only during lighting procedures or
reloading. Always close the door or put back on the fire screen after ignition. Do not leave the insert
unattended when the door is opened with or without a fire screen.
• WARNING : OPERATE ONLY WITH THE DOOR FULLY CLOSED OR FULLY OPEN WITH THE
FIRE SCREEN IN PLACE. IF THE DOOR IS LEFT PARTLY OPEN, GAS AND FLAME MAY BE
DRAWN OUT OF THE OPENING, CREATING RISKS FROM BOTH FIRE AND SMOKE.
• HOT WHILE IN OPERATION, KEEP CHILDREN, CLOTHING AND FURNITURE AWAY.
CONTACT MAY CAUSE SKIN BURNS. GLOVES MAY BE NEEDED FOR INSERT OPERATION.
• Using an insert with cracked or broken components, such as glass, firebricks or baffle may produce
an unsafe condition and may damage the insert.
• Open the air control fully before opening the loading door.
• NEVER USE GASOLINE, LANTERN FUEL (NAPHTHA), FUEL OIL, MOTOR OIL, KEROSENE,
CHARCOAL LIGHTER FLUID, OR SIMILAR LIQUIDS OR AEROSOLS TO START A FIRE IN
THIS INSERT. KEEP ALL SUCH LIQUIDS OR AEROSOLS WELL AWAY FROM THE INSERT
WHILE IT IS IN USE.
• Do not store fuel within heater minimum installation clearances.
• Burn only seasoned natural firewood.
• This appliance should always be maintained and operated in accordance with these instructions.
• Do not elevate the fire by means of grates, andirons or other means.
• Do not use makeshift materials or make any compromises when installing this insert.
• This wood heater needs periodic inspection and repair for proper operation. It is against federal
regulations to operate this wood heater in a manner inconsistent with operating instructions in this
manual.
• A smoke detector, a carbon monoxide detector and a fire extinguisher should be installed in the
house. Location of detectors should be chosen wisely to avoid false alarm when reloading the
appliance. The location of the fire extinguisher should be known by all family members.
This product can expose you to chemicals including carbon monoxide, which is
known to the State of California to cause cancer, birth defects or other reproductive
harm. For more information go to www.P65warnings.ca.gov/

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2. General Information
2.1 Performances
Values are as measured per test method, except for the recommended heating area, firebox volume,
maximum burn time and maximum heat output.
Model Matrix 2700 Insert (OB02700)
Combustion Technology Non-catalytic
Fuel Type Dry Cordwood
Recommended heating area (sq. ft..)1 750 to 2,000 ft2(70 to 186 m2)
Nominal firebox volume 2.5 ft3(0.071 m3)
Maximum burn time18 hours
Maximum heat output (dry cordwood)2 80,000 BTU/h (23.4 kW)
Overall heat output rate (min. to max.)2 3 14,200 BTU/h to 48,200 BTU/h
(4.16 kW to 14.13 kW)
Average overall efficiency3
Dry cordwood 68 % (HHV)4 73 % (LHV)5
Optimum efficiency6 74 %
Average particulate emissions rate7 1.14 g/h (EPA / CSA B415.1-10)8
Average CO9 53 g/h
1Recommended heating area and maximum burn time may vary subject to location in home, chimney draft,heat loss factors, climate, fuel type
and other variables. The recommended heated area for a given appliance is dened by the manufacturer as its capacity to maintain a minimum
acceptable temperature in the designated area in case of a power failure.
2The maximum heat output (dry cordwood) is based on a loading density varying between 15 lb/ft3and 20 lb/ft3. Other performances are based on
a fuel load prescribed by the standard. The specied loading density varies between 7 lb/ft³ and 12 lb/ft3. The moisture content is between 19%
and 25%.
3As measured per CSA B415.1-10 stack loss method.
4Higher Heating Value of the fuel.
5Lower Heating Value of the fuel.
6Optimum overall efciency at a specic burn rate (LHV).
7This appliance is ofcially tested and certied by an independent agency.
8Tested and certied in compliance with CFR 40 part 60, subpart AAA, section 60.534(a)(1(ii) and draft ASTM WK47329-14 and EPA alt-127
(ASTM E3053-17
9Carbon monoxide.

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2.2 Specifications
Maximum log length10 20 in (508 mm) east-west
Flue outlet diameter 6 in (150 mm)
Recommended connector pipe diameter 6 in (150 mm)
Type of chimney ULC S635, CAN/ULC-S640, UL 1777
Baffle material C-Cast
Approved for alcove installation Not applicable
Approved for mobile home installation11 No
Type of door Simple, glass with cast iron frame
Type of glass Ceramic glass
Blower Included (up to 176 CFM)
Particulate emission standard EPA / CSA B415.1-1012
USA Standard (Safety) UL 1482, UL 737
Canada Standard (Safety) ULC-S628
10 North-south: ends of the logs visible, East-west: sides of the logs visible.
11 Mobile homes (Canada) or manufactured homes (USA): The US Department of Housing and Urban Development describes “manufactured homes”
better known as “mobile homes” as follows; buildings built on xed wheels and those transported on temporary wheels/axles and set on a permanent
foundation. In Canada, a mobile home is a dwelling for which the manufacture and assembly of each component is completed or substantially
completed prior to being moved to a site for installation on a foundation and connection to service facilities and which conforms to the CAN/CSA-
Z240 MH standard.
12 Tested and certied in compliance with CFR 40 part 60, subpart AAA, section 60.534(a)(1(ii) and draft ASTM WK47329-14 and EPA alt-127
(ASTM E3053-17

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2.3 Dimensions
15 3/8"
391mm
6 5/8"
169mm
30 3/4"
781mm
25 3/4"
653mm
Ø
6"
150mm
22 1/8"
562mm
22 3/8"
568mm
24"
611mm
3 3/4"
94mm
15 5/8"
398mm
23 1/8"
588mm
21 1/8"
537mm
27 1/4"
691mm
24 3/4"
630mm 26 1/8"
662mm
24 7/8"
631mm
Figure 1: Top View Figure 2: Side View - Minimum Insert Projection
24 3/8"
618mm
12 5/8"
319mm
30 1/8"
766mm
43 5/8"
1107mm
OPTION: AC01263
2"
51mm
4"
102mm 17 1/8" 434mm
Figure 3: Front View Figure 4: Side View - Maximum Insert Projection

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25 3/8"
645mm
10 1/2"
268mm
18 5/8"
472mm
21 3/4"
553mm
Figure 5: Door Opening Figure 6: Top view - Combustion chamber
22 5/8"
573mm 17 1/2"
446mm
12 3/8"
315mm 15 7/8"
402mm
12 7/8"
326mm
3/16"
5mm
3/16"
5mm
Figure 7: Front View - Combustion Chamber Figure 8: Side View - Combustion Chamber

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2.4 Materials
The body of this insert, which is most of its weight, is carbon steel. Should it ever become
necessary many years in the future, almost the entire insert can be recycled into new products,
thus eliminating the need to mine new materials.
The paint coating on the insert is very thin. Its VOC content (Volatile Organic Compounds) is
very low. VOCs can be responsible for smog, so all the paint used during the manufacturing
process meets the latest air quality requirements regarding VOC reduction or elimination.
The air tubes are stainless steel, which can also be recycled.
The baffle is made of C-Cast compressed with a binder to form a rigid board. C-Cast can
withstand temperatures above 2,000°F. It is not considered hazardous waste. Disposal at a
waste management center is recommended.
Moulded refractory panels are mainly composed of silicon dioxide, also known as silica, a
product processed from a mined mineral. It is most commonly found in nature in the form
of sand and clay. Disposal at a waste management center is recommended. The steel mesh
contained in some refractory bricks can also be recycled.
The door and glass gaskets are fibreglass which is spun from melted sand. Black gaskets
have been dipped into a solvent-free solution. Disposal at a waste management center is
recommended.
The door glass is a 5/32" (4 mm) thick ceramic material that contains no toxic chemicals. It
is made of natural raw materials such as sand and quartz that are combined in such a way to
form a high temperature glass. Ceramic glass cannot be recycled in the same way as normal
glass, so it should not be disposed of with the regular household products. Disposal at a waste
management center is recommended.
2.5 Zone Heating
This insert is a space heater, which means it is intended to heat the area it is installed in, as well
as spaces that connect to that area, although to a lower temperature. This is called zone heating
and it is an increasingly popular way to heat homes or spaces within homes.
Zone heating can be used to supplement another heating system by heating a particular space
within a home, such as a basement, a family room or an addition that lacks another heat source.
Houses of moderate size and relatively new construction can be heated with a properly sized
and located wood insert. Whole house zone heating works best when the insert is in the part of
the house where the family spends most of its time. This is normally the main living area where
the kitchen, dining and living rooms are located.
Locating the insert in this area will give the maximum benefit of the heat it produces and will
achieve the highest possible heating efficiency and comfort. The space where the most time is
spent will be warmest, while bedrooms and basement (if there is one) will stay cooler. In this
way, less wood is burned than with other forms of heating.
Although the insert may be able to heat the main living areas of the house to an adequate
temperature, it is strongly recommended to also have a conventional oil, gas or electric heating
system to provide backup heating.

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The success of zone heating will depend on several factors, including the correct sizing and
location of the insert, the size, layout and age of the home and the climate zone. Three-season
vacation homes can usually be heated with smaller inserts than houses that are heated all winter.
2.6 Emissions and Efficiency
The low smoke emissions produced by the special features inside this insert firebox means
that the household will release up to 90% less smoke into the outside environment than if an
older conventional insert was used. But there is more to the emission control technologies than
protecting the environment.
The smoke released from wood when it is heated contains about half of the energy content of
the fuel. By burning the wood completely, this insert releases all the heat energy from the wood
instead of wasting it as smoke up the chimney. Also, the features inside the firebox allow control
of the air supply meaning controlling the heat output, while maintaining clean and efficient
flaming combustion, which boosts the efficient delivery of heat to the home.
The emission control and advanced combustion features of this insert can only work properly
if the fuel used is in the correct moisture content range of 15% to 20%. Refer to the following
section for suggestions on preparing fuelwood and judging its moisture.
3. Fuel
Good firewood has been cut to the correct length for the insert, split to a range of sizes and
stacked in an open area until its moisture content is down to 15% to 20%.
DO NOT BURN:
• GARBAGE;
• LAWN CLIPPINGS OR YARD WASTE;
• MATERIALS CONTAINING RUBBER,
INCLUDING TIRES;
• MATERIALS CONTAINING PLASTIC;
• WASTE PETROLEUM PRODUCTS,
PAINTS OR PAINT THINNERS, OR
ASPHALT PRODUCTS;
• MATERIALS CONTAINING ASBESTOS;
• CONSTRUCTION OR DEMOLITION
DEBRIS;
• RAILROAD TIES OR PRESSURE-
TREATED WOOD;
• MANURE OR ANIMAL REMAINS;
• SALT WATER DRIFTWOOD OR OTHER
PREVIOUSLY SALT WATER SATURATED
MATERIALS;
• UNSEASONED WOOD; OR
• PAPER PRODUCTS, CARDBOARD,
PLYWOOD, OR PARTICLE BOARD.
THE PROHIBITION AGAINST BURNING
THESE MATERIALS DOES NOT
PROHIBIT THE USE OF FIRE STARTERS
MADE FROM PAPER, CARDBOARD,
SAW DUST, WAX AND SIMILAR
SUBSTANCES FOR THE PURPOSE OF
STARTING A FIRE IN AN AFFECTED
WOOD HEATER.
BURNING THESE MATERIALS MAY RESULT IN THE RELEASE OF TOXIC FUMES
OR RENDER THE HEATER INEFFECTIVE AND CAUSE SMOKE.
3.1 Tree Species
The tree species the firewood is produced from is less important than its moisture content. The
main difference in firewood from various tree species is the density of the wood. Hardwoods are
denser than softwoods.

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Homeowners with access to both hardwood and softwood use both types for different purposes.
Softer woods make good fuel for mild weather in spring and fall because they light quickly and
produce less heat. Softwoods are not as dense as hardwoods so a given volume of wood
contains less energy. Using softwoods avoids overheating the house, which can be a common
problem with wood heating in moderate weather. Harder woods are best for colder winter
weather when more heat and longer burn cycles are desirable.
Note that hardwood trees like oak, maple, ash and beech are slower growing and longer lived
than softer woods like poplar and birch. That makes hardwood trees more valuable. The advice
that only hardwoods are good to burn is outdated. Old, leaky cast iron inserts wouldn’t hold a
fire overnight unless they were fed large pieces of hardwood. That is no longer true.
3.2 Log Length
Logs should be cut at least 1" (25 mm) shorter than the firebox so they fit in
easily. Pieces that are even slightly too long makes loading the insert very
difficult. The most common standard length of firewood is 16" (400 mm).
3.3 Piece Size
Firewood dries more quickly when it is split. Large unsplit rounds can take years to dry enough
to burn. Even when dried, unsplit logs are difficult to ignite because they don’t have the sharp
edges where the flames first catch.
Wood should be split to a range of sizes, from about 3" to 6" (75 mm to 150 mm) in cross
section. Having a range of sizes makes starting and rekindling fires much easier.
3.4 Compressed Wood Logs
Compressed wood logs made of 100% compressed sawdust can be
burned with caution in the number of these logs burned at once. Do
not burn compressed logs made of wax impregnated sawdust or logs
with any chemical additives. Follow the manufacturer’s instructions
and warnings.
3.5 Drying Time
Firewood that is not dry enough to burn is the cause of most complaints about wood inserts.
Continually burning green or unseasoned wood produces more creosote and involves lack of
heat and dirty glass door.
Firewood with a moisture content between 15% and 20% will allow the insert to produce its
highest possible efficiency.

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Here are some facts to consider in estimating drying time:
− Firewood bought from a dealer is rarely
dry enough to burn, so it is advisable
to buy the wood in spring and dry it
yourself;
− Drying happens faster in dry weather
than in a damp climate;
− Drying happens faster in warm summer
weather than in winter weather;
− Split pieces dry more quickly than
unsplit rounds;
− Softwoods like pine, spruce, poplar,
and aspen take less time to dry than
hardwoods. they can be dry enough to
burn after being stacked to air dry only for the summer months;
− Hardwoods like oak, maple and ash can take one, or even two years to dry fully, especially if the
pieces are big;
− Firewood dries more quickly when stacked outside in a location exposed to sun and wind; it takes
much longer to dry when stacked in a wood shed;
Use these guidelines to find out if the firewood is dry enough to burn:
− Cracks form at the ends of logs as they dry;
− The wood turns from white or cream colored to grey or yellow;
− Two pieces of wood struck together sounds hollow;
− Dry wood is much lighter in weight than wet wood,
− The face of a fresh cut feels warm and dry;
− The moisture content read by a moisture meter is between
15% to 20%.
4. Operating the Insert
Before using the insert, the following steps should be completed :
• Install the faceplate decorative panel (see «Appendix 2: Faceplate Decorative Panel Installation» );
• Install the faceplate (see «Appendix 3: Faceplate Installation»);
• Install the door overlay (see «Appendix 4: Door Overlay Installation»).
The following steps are optional :
• Connect the blower with a BX wire (See «Appendix 1: Connecting the Blower with a BX Wire»);
• Install the 2" or 4" projection kit (refer to the projection kit installation instructions);
• Install the cuttable faceplate (refer to the projection kit installation instructions);
• Install the fresh air intake (See «Appendix 5: Optional Fresh Air Intake Kit Installation»).
This wood heater has a manufacturer-set minimum low burn rate that
must not be altered. It is against federal regulations to alter this setting or
otherwise operate this wood heater in a manner inconsistent with operating
instructions in this manual.

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4.1 Blower operation
A blower is already installed on this insert. It is located
at the bottom of the insert. Its function is to increase
airflow through the heat exchanger and improve hot
air circulation in the room. When used regularly, the
blower can provide a small increase in efficiency, up
to 2%. However, the use of a blower should not be
used as a way to gain more output from an insert that
is undersized for the space it is intended to heat.
The blower has a variable speed control that can be
adjusted in three different positions; either from high (HI) to
low (LO) or closed (OFF). Allow the insert to reach operating
temperature (approximately one hour) before turning on
the blower, since increased airflow from the blower will
remove heat and affect the start up combustion efficiency.
The blower is equipped with a heat sensor. Therefore, the
switch can be left in the automatic position (1). The blower
will start automatically when the insert is hot enough and it
will stop when the insert has cooled down. The switch can
also be set to the manual position (3) to turn on the blower
manually and have it run continuously. The position (2)
stops the blower and prevent it from starting automatically
when the insert is hot enough.
4.2 Fire Screen
This insert has been tested for use with an open door in conjunction with a fire screen, sold
separately. The fire screen must be properly secured on the insert to avoid any risk of sparks
damaging the flooring. When the fire screen is in use, do not leave the insert unattended to
respond promptly in the event of smoke spillage into the room. Potential causes of smoke
spillage are described in Section «10. The Venting System» of this manual. See «Appendix 6:
Optional Fire Screen Installation» for installation instructions.
Operating the insert with a fire screen increases possibilities of generating carbon monoxide. Carbon
monoxide is an odourless gas that is highly toxic which can cause death at high concentration in
air. Installation of a carbon monoxide detector is highly recommended.
5. Burning Wood Efficiently
5.1 First Use
Two things happen when burning the first few fires; the paint cures and the internal components are
conditioned. As the paint cures, some of the chemicals vaporize. The vapors are not poisonous,
but they smell bad. Fresh paint fumes can also trigger false alarms in smoke detectors. When
lighting the heater for the first few times, it may be wise to open doors and windows to ventilate
the house.
Ensure the blower cord is not in contact
with any surface of the insert to prevent
electrical shock or fire damage. Do not
run cord beneath the insert.
HI / OFF
LOW

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Burn two or three small fires to begin the curing and conditioning process. Then build bigger
and hotter fires until there is no longer paint smell from the insert. As hotter and hotter fires are
burned, more of the painted surfaces reach the curing temperature of the paint. The smell of
curing paint does not disappear until one or two very hot fires have been burned.
5.2 Lighting Fires
Each person heating with wood develops its own favorite way to light fires. Regardless of the
method chosen, the goal should be to have a hot fire burning, quickly. A fire that ignites fast
produces less smoke and deposits less creosote in the chimney.
Here are three popular and effective ways to ignite wood fires.
5.2.1 Conventional Method
The conventional method to build a wood fire is to crumple 5 to 10
sheets of newspaper and place them in the firebox and hold them
in place with ten pieces of kindling wood. The kindling should be
placed on and behind the newspaper. Then add two or three small
pieces of firewood. Open the air intake control completely and ignite
the newspaper. Leave the door slightly ajar. Once the fire has ignited,
the door can be closed with the air control still fully open. When the
kindling is almost completely burned, standard firewood pieces can be
added.
Do not leave the insert unattended when the door is slightly open.
Always close and latch the door after the fire ignites.
5.2.2 The Top Down Method
This method is the opposite of the conventional method and only works properly if well-seasoned
wood is used.
Place three or four small, split, dry logs in the firebox. Arrange the kindling wood on the logs in
two layers at right angles and place a dozen finely split kindling on the second row. It is possible
to use ragged paper but it may not hold in place since it tends to roll while it is burning. The best
is to wrap a sheet on itself, grab the ends of the roll and make a knot. Use four or five sheets
of paper tied together and put them on top and around the kindling. Open the air intake control
completely, ignite the paper and close the door.
The top down fire method has two advantages over the traditional method: first, the fire does
not collapse on itself, and it is not necessary to add wood gradually since the combustion
chamber is full before the fire is lit.
5.2.3 Two Parallel Logs Method
Two spit logs are placed in the firebox with a few sheets of twisted newspapers in between the
logs. Fine kindling is added across the two logs and some larger kindling across those, log cabin
style. Newspaper is lit.
Never use gasoline, gasoline-type lantern fuel (naphtha), fuel oil, motor oil,
kerosene, charcoal lighter fluid, or similar liquids or aerosols to start or ‘freshen
up’ a fire in this wood insert. Keep all such liquids well away from the insert
while it is in use.

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5.2.4 Using Fire Starters
Commercial fire starters can be used instead of a newspaper. Some of these starters are made
of sawdust and wax and others are made of specialized flammable solid chemicals. Always
follow the package directions when using. Gel starters can also be used, but only to light a fire,
in a cold combustion chamber without hot embers inside.
5.3 Combustion Cycles
Wood heating with a space heater is very different than other forms of heating. There will be
temperature variations in different parts of the house and there will be temperature variations
throughout day and night. This is normal, and for experienced wood burners these are advantages
of zone heating wood burning.
Wood heaters don’t have a steady heat output. It is normal for the temperature to rise after
a new load of wood is ignited and for its temperature to gradually decrease throughout the
burning cycle. This increasing and decreasing temperature can be matched with the household
routines. For example, the temperature in the area can be cooler when the household is active,
and it can be warmer when it is inactive.
Wood burns best in cycles. A cycle starts when a new load of wood is ignited by hot coals and
ends when that load has been consumed down to a bed of charcoal about the same size as it
was when the wood was loaded.
Trying to produce a steady heat output by placing a single log on the fire at regular intervals
is not recommended. Always place at least three, and preferably more pieces on the fire at a
time so that the heat radiated from one piece helps to ignite the pieces next to it. Each load of
wood should provide several hours of heating. The size of each load may vary depending on the
amount of heat required.
Burning in cycles means the loading door does not need to be opened while the wood is flaming.
This is an advantage since it is preventing smoke leaking from the heater when the door is
opened as a full fire is burning. This is especially true if the chimney is on the outside wall of the
house.
5.4 Rekindling a Fire
When the temperature of the room is lower and all that remains is embers, it is time to reload.
Remove excess ash from the front of the firebox and bring the ashes forward. Place a new load
of wood on, and at the back of the embers. Open the air control completely and close the door.
If the door must be opened while the fire is flaming, fully open air control for a few
minutes then open the door slowly.

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Raking the coals is useful for two reasons. First, it brings them near where most of the combustion
air enters the firebox. This will ignite the new load quickly. Secondly, the charcoal will not be
smothered by the new load of wood. When the embers are simply spread inside the combustion
chamber, the new load smoulder for a long time before igniting.
Close the air control only when the firebox is full of bright turbulent flames, the wood is charred,
and its edges are glowing.
The heater should not be left unattended during ignition and the fire should not
burn at full intensity for more than a few minutes.
When lighting a new load, the appliance produces a heat surge. This heat surge is pleasant when
the room temperature is cool but can be unpleasant when the room is already warm. Therefore,
it is best to let each load of wood burn completely so that the room cools down before putting
a load of wood back on.
5.5 Removing Ashes
Ash should be removed from the firebox every two to three days of full time heating. Ash should
not accumulate excessively in the firebox since it will affect the proper operation of the appliance.
The best time to remove ash is in the morning, after an overnight fire when the insert is relatively
cold, but there is still a little chimney draft to draw the ash dust into the insert and prevent going
out into the room. Ashes almost always contain live embers that can stay hot for days and which
release carbon monoxide gas.
Ashes should be placed in a tightly covered metal container. The container must
be placed on a non-combustible floor or on the ground well away from all
combustible materials. Ashes almost always contain live embers that can stay
hot for days and which release carbon monoxide gas. If the ashes are disposed
of by burial in soil or otherwise locally dispersed, they should be kept in a closed
metal container until they are completely cooled. No other waste should be
placed in this container.
5.6 Air Intake Control
Once the firewood, firebox and chimney are hot, air intake can be
reduced to achieve a steady burn. As the air intake is reduced, the
burn rate decreases. This has the effect of distributing the thermal
energy of the fuel over a longer period of time. In addition, the flow
rate of exhaust through the appliance and flue pipe slows down,
which increases the duration of the energy transfer of the exhaust
gases. As the air intake is reduced, the flame slows down.
If the flames diminish to the point of disappearing, the air intake has
been reduced too early in the combustion cycle or the wood used is
too wet. If the wood is dry and the air control is used properly, the
flames should decrease, but remain bright and stable.
NEVER STORE ASHES INDOORS OR IN A NON-METALLIC CONTAINER
OR ON A WOODEN DECK.
CENDRES
ASHES

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On the other hand, too much air can make the fire uncontrollable, creating very high temperatures
in the unit as well as in the chimney and seriously damaging them. A reddish glow on the unit
and on the chimney components indicates overheating. Excessive temperatures can cause a
chimney fire.
5.7 Fire Types
Using the air intake control is not the only way to match the insert heat output to the desired
temperature in the house. A house will need far less heating in October than in January to
maintain a comfortable temperature. Filling the firebox full in fall weather will overheat the space.
Otherwise, the combustion rate will have to be reduced to a minimum and the fire will be smoky
and inefficient.
Here are some suggestions for building fires suitable for different heating needs.
5.7.1 Flash Fire
To build a small fire that will produce a low heat output, use small pieces of firewood and load
them crisscross in the firebox. The pieces should only be 3" to 4" in diameter. After raking the
coals, lay two pieces parallel to each other diagonally in the firebox and lay two more across
them in the other direction. Open the air control fully and only reduce the air after the wood
is fully flaming. This kind of fire is good for mild weather and should provide enough heat for
up to four hours. Small fires like this are a good time to use softer wood species and avoid
overheating the house.
5.7.2 Low and Long Output Fires
For a fire that will last up to eight hours but will not produce intense heat, use soft wood and
place the logs compactly in the firebox. Before reducing the air intake, the load will have to burn
at full heat for long enough for charring the surface of the logs. The flame must be bright before
letting the fire burn by itself.
5.7.3 High Output Fires
When heating needs are high during cold weather, the fire should burn steadily and brightly. This
is the time to use larger pieces of hardwood. Place the biggest pieces at the back of the firebox
and place the rest of the pieces compactly. A densely built fire like this will produce the longest
combustion this insert is capable of. Special attention must be paid when building fires like this
since if the air intake is reduced too quickly, the fire could smoulder. The wood must be flaming
brightly before leaving the fire to burn.
5.7.4 Burn Cycle Times
The burn cycle time is the period between loading wood on a coal bed and the consumption of
that wood back to a coal bed of the same size. The flaming phase of the fire lasts for roughly
the first half of the burn cycle and the second half is the coal bed phase during which there is
little or no flame. The burning time expected from this insert, including both phases, will vary
depending on a number of things, such as:
− firebox size,
− the amount of wood loaded,
− the species of wood,
− the wood moisture content,
− the size of the space to be heated,
− the climate zone where the house is, and
− the time of the year.