Enerzone Harmony 2.3 User manual

Installation
and Operation
Manual
Printed in Canada
Safety tested according to
ULC S627, UL 1482 and
UL 737 standards by an
accredited laboratory.
CONTACT LOCAL BUILDING OR FIRE OFFICIALS ABOUT RESTRICTIONS AND INSTALLATION INSPECTION REQUIREMENTS IN
LOCAL AREA.
READ THIS ENTIRE MANUAL BEFORE INSTALLATION AND USE OF THIS WOOD STOVE. FAILURE TO FOLLOW THESE
INSTRUCTIONS COULD RESULT IN PROPERTY DAMAGE, BODILY INJURY OR EVEN DEATH.
READ AND KEEP THIS MANUAL FOR REFERENCE
ENGLISH
45928A
2018-07-24
HARMONY 2.3
(EB00045 model)

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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 stove.
It is highly recommend that
this wood burning hearth
product be installed and
serviced by professionals who
are certified by a «Qualified
Agengy» such as NFI (National
Fireplace Institute®) or CSIA
(Chimney Safety Institute of
America) in the United States
and 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 your local
area.
A building permit might be
required for the installation of
this stove and the chimney
that it is connected to. It is
also highly recommended to
inform your home insurance
company.
Please read this entire manual
before installing and using this
stove.
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.
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
can not 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.enerzone-intl.com/en/warranty/warranty-registration/
Registering the warranty will help to quickly find the information needed on the unit.
THANK YOU FOR CHOOSING
THIS WOOD STOVE.
If this stove 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.

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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 Zone Heating and How to Make it Work for You ................................................................12
2.5 The Benefits of Low Emissions and High Efficiency ...........................................................12
3. Fuel ......................................................................................................................................... 13
3.1 How to Prepare or Buy Good Firewood ............................................................................13
4. Operating Your Stove ............................................................................................................. 16
4.1 Before Operating Your Stove ...........................................................................................16
4.2 Blower Operation ............................................................................................................16
4.3 The First Fires.................................................................................................................16
4.4 Lighting Fires..................................................................................................................17
4.5 Maintaining Wood Fires ...................................................................................................18
4.6 Building Different Fires for Different Needs........................................................................20
5. Maintaining Your Wood Heating System............................................................................... 22
5.1 Stove Maintenance .........................................................................................................22
5.2 Chimney Maintenance .....................................................................................................25
PART B - INSTALLATION............................................................................................................ 26
6. Safety Information and Standards......................................................................................... 26
6.1 Mobile Home ..................................................................................................................26
6.2 Regulations Covering Stove Installation ............................................................................26
7. Clearances to Combustible Material ..................................................................................... 27
7.1 Location of the Certification Label....................................................................................27
7.2 Clearances to Combustible Materials ...............................................................................27
7.3 Floor Protector ...............................................................................................................32
7.4 Reducing Wall and Ceiling Clearances Safely ....................................................................33
8. The Venting System................................................................................................................ 36
8.1 General .........................................................................................................................36
8.2 Suitable Chimneys ..........................................................................................................36
8.3 Minimum Chimney Height ................................................................................................38
8.4 The Relationship Between the Chimney and the House .....................................................38
8.5 Supply of Combustion Air ................................................................................................39
8.6 Installing the Chimney Connector.....................................................................................40
Appendix 1. Door Overlay Installation..................................................................................... 43

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Appendix 2. Optional Fresh Air Intake Kit Installation............................................................ 44
Appendix 3. Optional Blower and Thermodisc Installation.................................................... 45
Appendix 4. Optional Refractory Panels Installation.............................................................. 46
Appendix 5. Air Tubes and Baffle Installation ......................................................................... 49
Appendix 6. Exploded Diagram and Parts List....................................................................... 51
Enerzone Limited Lifetime Warranty ......................................................................................... 54
Dealer:
Installer:
Phone Number:
Serial Number:

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CERTIFICATION PLATE

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PART A - OPERATION AND MAINTENANCE
1. Safety Information
• Operate only with the door fully closed. 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 THE STOVE OPERATION.
• Using a stove with cracked or broken components, such as glass, firebricks or baffle may produce
an unsafe condition and may damage the stove.
• 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 STOVE. KEEP ALL SUCH LIQUIDS OR AEROSOLS WELL AWAY FROM THE STOVE
WHILE IT IS IN USE.
• Do not store fuel within heater minimum installation clearances.
• Burn only seasoned natural firewood.
• DO NOT BURN:
- GARBAGE OF ANY KIND,
- COAL OR CHARCOAL,
- TREATED, PAINTED OR COATED WOOD,
- PLYWOOD OR PARTICLE BOARD,
- FINE PAPER, COLORED PAPER OR CARDBOARD,
- SALT WATER DRIFTWOOD,
- MANUFACTURED LOGS CONTAINING WAX OR CHEMICAL ADDITIVES,
- RAILROAD TIES OR
- LIQUIDS SUCH AS KEROSENE OR DIESEL FUEL TO START A FIRE.
• This appliance should always be maintained and operated in accordance with these instructions.
• Do not elevate the fire by using a grate.
• A smoke detector, a carbon monoxide detector and a fire extinguisher should be installed in the
house. 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 Harmony 2.3 (EB00045)
Fuel Type Dry Cordwood
Recommended heating area (sq. ft..)1500 to 2,100 ft2(47 to 195 m2)
Nominal firebox volume 2.4 ft3 (0.068 m3)
Maximum burn time18 hours
Maximum heat output (dry cordwood)275,000 BTU/h (22.0 kW)
Overall heat output rate (min. to max.)2 3 14,800 BTU/h to 28,600 BTU/h
(4.34 kW to 8.38 kW)
Average overall efficiency3
Dry cordwood 69 % (HHV)474 % (LHV)5
Optimum efficiency677 %
Average particulate emissions rate71.54 g/h (EPA / CSA B415.1-10)8
Average CO989.4 g/h
1 Recommended heating area and maximum burn time may vary subject to location in home, chimney draft, heat loss factors, climate, fuel type, feed
rate, fuel level, 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 considering that the space conguration and the presence of heat distribution systems have a signicant impact
in making heat circulation optimum.
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.
9Carbon monoxide.

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2.2 Specifications
Maximum log length120 in (508 mm) east-west
Flue outlet diameter 6 in (150 mm)
Recommended connector pipe diameter 6 in (150 mm)
Type of chimney ULC S629, UL 103 HT (2100 °F)
Baffle material C-Cast
Approved for alcove installation Yes
Approved for mobile home installation2Yes
Shipping weight (without option) 435 lb (198 kg)
Appliance weight 392 lb (178 kg)
Type of door Simple, glass with cast iron frame
Type of glass Ceramic glass
Blower Optional (up to 130 CFM)
Particulate emission standard EPA / CSA B415.1-103
USA standard (Safety) UL 1482, UL 737
Canada standard (Safety) ULC S627
1East-west: through the door you see the longitudinal sides of the logs; north-south: through the door you see the tips of the logs.
2Mobile home (Canada) or manufactured home (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.
3Tested and certied in compliance with CFR 40 part 60, subpart AAA, section 60.534(a)(1(ii) and Draft ASTM WK47329-14.

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2.3 Dimensions
2.3.1 Stove Dimensions
Ø
6"
150mm
12 7/8"
325mm
6 1/2"
165mm
Figure 1: Top view
25 5/8"
651mm
25 3/4"
655mm
10 1/8"
257mm
16 1/2"
419mm
9 7/8"
250mm
20 1/4"
515mm
30 1/8"
766mm
21 5/8"
550mm
29 1/2"
749mm
25 5/8"
652mm
Figure 2: Front view Figure 3: Side view

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2.3.2 Combustion Chamber Dimensions
9"
228mm 17 1/2"
444mm
21"
533mm
Figure 4: Door opening Figure 5: Front view - Combustion chamber
11 7/8"
301mm
17 1/4"
438mm
5/16"
8mm
3/16"
5mm
Figure 6: Side view - Combustion chamber

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2.4 Zone Heating and How to Make it Work for You
This stove 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 stove. Whole house zone heating works best when the stove 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 stove 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 burnt than with other forms
of heating.
Although the stove 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.
The success of zone heating will depend on several factors, including the correct sizing and
location of the stove, the size, layout and age of your home and your climate zone. Three-season
vacation homes can usually be heated with smaller stoves than houses that are heated all winter.
2.5 The Benefits of Low Emissions and High Efficiency
The low smoke emissions produced by the special features inside this stove firebox mean that
the household will release up to 90% less smoke into the outside environment than if an older
conventional stove 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 stove 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 stove can only work properly if the fuel
used is in the correct moisture content range of 15% to 20%. See section «3. Fuel» of this manual for
suggestions on preparing fuelwood and judging its moisture.
The SBI Commitment to You and the EnvironmentThe SBI team is committed to protecting the
environment, so we do everything we can to use only materials in our products that will have no
lasting negative impact on the environment.
2.5.1 What is This Stove Made Of?
The body of this stove, which is most of its weight, is carbon steel. Should it ever become
necessary many years in the future, almost the entire stove can be recycled into new products,
thus eliminating the need to mine new materials.

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The paint coating on the stove 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 C-Cast baffle is made of aluminosilicate fibre material that is 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 landfill is recommended.
The firebrick is 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 landfill is recommended.
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 landfill is recommended.
The door glass is a 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 your regular household products. Disposal at a landfill is
recommended.
3. Fuel
DO NOT BURN:
- GARBAGE OF ANY KIND,
- COAL OR CHARCOAL,
- TREATED, PAINTED OR COATED WOOD,
- PLYWOOD OR PARTICLE BOARD,
- FINE PAPER, COLORED PAPER OR CARDBOARD,
- SALT WATER DRIFTWOOD,
- MANUFACTURED LOGS CONTAINING WAX OR CHEMICAL ADDITIVES,
- RAILROAD TIES AND
- LIQUIDS SUCH AS KEROSENE OR DIESEL FUEL TO START A FIRE.
3.1 How to Prepare or Buy Good Firewood
3.1.1 What is Good Firewood?
Good firewood has been cut to the correct length for the stove, split to a range of sizes and
stacked in the open until its moisture content is down to 15% to 20%.
3.1.2 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. People who live in the coldest regions of North America usually have
only spruce, birch and poplar, other low-density species to burn and yet they can heat their
homes successfully.

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Homeowners with access to both hardwood and softwood sometimes use both types for different
purposes. For example, 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 stoves wouldn’t hold
a fire overnight unless they were fed large pieces of hardwood. That is no longer true. It is
possible to successfully heat a home by using the less desirable tree species and give the forest
a break at the same time.
3.1.3 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 stove very
difficult. The most common standard length of firewood is 16" (400 mm).
The pieces should be a consistent length, with a maximum of 1" (25 mm)
variation from piece to piece.
3.1.4 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. Logs as small as 3" (75 mm) should be split to encourage
drying.
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. Often, the
firewood purchased from commercial suppliers is not split small enough to fuel the fire. It is
sometimes advisable to resplit the wood before stacking to air dry.
3.1.5 How to Dry Firewood
Firewood that is not dry enough to burn is the cause of most complaints about wood stoves.
Continually burning green or unseasoned wood produces more creosote and involves lack of
heat and dirty glass door.

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Here are some things to consider in estimating drying time:
− Firewood takes a long time to dry;
− 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 damp, maritime climates;
− Drying happens faster in warm summer
weather than in winter weather;
− Small pieces dry more quickly than
large pieces;
− Split pieces dry more quickly than
unsplit rounds;
− Softwoods take less time to dry than hardwoods;
− Softwoods like pine, spruce, poplar, and aspen 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;
− Firewood that is ready to burn has a moisture content between 15% and 20% and will allow the
stove to produce its highest possible efficiency.
3.1.6 Judging Firewood Moisture Content
Use these guidelines to find out if the firewood is dry enough to burn:
− Cracks form at the ends of logs as they dry,
− As it dries in the sun, the wood turns from white or cream colored to grey or yellow,
− Bang two pieces of wood together; seasoned wood sounds hollow and wet wood sounds dull,
− Dry wood is much lighter in weight than wet wood,
− Split a piece, and if the fresh face feels warm and dry it is dry
enough to burn; if it feels damp, it is too wet,
− Burn a piece; wet wood hisses and sizzles in the fire and dry
wood does not.
A wood moisture meter can be bought to test the firewood.
3.1.7 Manufactured Logs
Do not burn manufactured logs made of wax impregnated sawdust or
logs with any chemical additives. Manufactured logs made of 100%
compressed sawdust can be burned with caution in the number of
these logs burned at once. Start with one manufactured log and see
how the stove reacts. Never use more than two manufactured logs.

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4. Operating Your Stove
4.1 Before Operating Your Stove
Before using the stove, the following items should be installed :
• The door overlay (see «Appendix 1. Door Overlay Installation», page 43 ),
• The optional fresh air intake kit (see «Appendix 2. Optional Fresh Air Intake Kit Installation», page
44
• The optional blower (See «Appendix 3. Optional Blower and Thermodisc Installation», page 45)
• The optional refractory slabs (See «Appendix 4. Optional Refractory Panels Installation», page
46«) .
4.2 Blower Operation
It is possible to install a blower on this stove. The blower is
optional and is sold separatly. See «Appendix 6. Exploded
Diagram and Parts List»for genuine part number.
The blower is installed on the back of the stove 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 a stove that is undersized for the space
it is intended to heat.
Figure 7: Air flow with a blower
The blower has a rheostat that can be adjusted in three different
positions; either from high (HI) to low (LO) or closed (OFF).
Allow the stove 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 also equipped with a heat sensor. When the
blower is ON, it will start automatically when the stove is hot
enough and it will stop when the stove has cooled down.
Therefore, the blower speed control can be left at the desired
setting.
OFF
HI
LO
Figure 8: Blower rheostat
4.3 The First Fires
Two things will happen when burning the first few fires; the paint cures and the internal
components of the stove are conditioned.
Ensure the blower cord is not in contact
with any surface of the stove to prevent
electrical shock or fire damage. Do not run
cord beneath the stove.

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As the paint cures, some of the chemicals vaporize. The vapors are not poisonous, but they do
smell bad. Fresh paint fumes can also cause false alarms in smoke detectors.
So, when lighting the stove, be prepared by opening doors or windows to ventilate the house.
Burn one or two small fires to begin the curing and conditioning process. Then build bigger and
hotter fires until there is no longer paint smell from the stove.
As hotter and hotter fires are burnt, 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 burnt.
4.4 Lighting Fires
Each person heating with wood develops its own favourite way to light fires. Whichever method
is chosen, the goal should be to get 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.
4.4.1 Conventional Method
The conventional method to build a wood fire is to bunch up 5 to 10
sheets of newspaper and place them in the firebox. Next, a dozen
pieces of fine kindling are placed on the newspaper. This kindling
should be very thin; less than 1 inch thick (25 mm). Then, larger
kindling pieces are placed on the fine kindling. The air control fully
open, the newspaper is lit. With a tall and straight venting system
the door can be closed immediately and the fire will ignite. 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 until the fire is the right size for the
weather.
DO NOT LEAVE THE STOVE UNATTENDED WHEN THE DOOR IS SLIGHTLY OPENED.
ALWAYS CLOSE AND LATCH THE DOOR AFTER THE FIRE IGNITES.
4.4.2 The Top Down Method
The top down method solves two problems encountered when using the conventional method:
first, the fire does not collapse on itself and smother as it burns; and second, it is not necessary
to build up the fire gradually since the firebox is loaded before the fire is lit. A top down fire can
burn for two hours or more. The top down method works properly only if well-seasoned wood
is used.
Three or four full-sized split pieces of dry firewood are placed in the firebox. Then, 4 or 5 more
finely split pieces of firewood (2" to 3" [50 mm to 75 mm] in diameter) are placed on the top of
the logs at right angles (log cabin style). Next, a dozen finely split kindling are placed on the
second layer at right angles.
The fire is topped with 5 sheets of newspaper, stuffed in between the kindling, under the baffle.
Knots can be made in the newspaper by rolling up single sheets corner to corner and tying a
knot in them. The advantage of knots is that they don’t roll off the fire as they burn. Newspaper
is lit and the fire burns from top to bottom.

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4.4.3 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.
4.4.4 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.
DO NOT USE FLAMMABLE LIQUIDS SUCH AS GASOLINE, NAPHTHA, FUEL OIL, MOTOR
OIL, OR AEROSOLS TO START OR REKINDLE THE FIRE.
4.5 Maintaining Wood Fires
4.5.1 General Advice
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 stoves 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 stove door does not need to be opened while the wood is flaming.
This is an advantage since it is preventing smoke leaking from the stove 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.
If the door must be open while the fire is flaming, fully open air control for a few minutes
then open the door slowly. (See section «4.5.5 Controlling the Air Intake»)
4.5.2 Ash Removal
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 stove.

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The best time to remove ash is in the morning, after an overnight fire when the stove is relatively
cold, but there is still a little chimney draft to draw the ash dust into the stove and prevent going
out into the room.
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 can contain hot embers that can stay hot for several days. 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.
NEVER STORE ASHES INDOORS OR IN A NON-METALLIC CONTAINER OR ON A WOODEN
DECK.
4.5.3 Raking Charcoal
When the room temperature is cooler, it is time to reload the stove. Remove the ashes first, then
rake charcoal towards the front of the firebox before reloading. Most of the remaining charcoal
will be at the back of the firebox, furthest from the door. Rake the coals towards the door before
loading.
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.
4.5.4 Firing Each New Load Hot
Place the new load of wood on and behind the charcoal. Close the door and open the air control
fully until the firebox is full of flames, the wood has charred to black and its edges are glowing
red. Firing each load of wood hot accomplishes the following things:
− Removes surface moisture from the wood,
− Creates a layer of char on the wood, which slows down the smoke release,
− Heats the firebox components so they reflect heat back to the fire, and
− Heats the chimney so it can produce strong, steady draft for the rest of the cycle.
Although it is important to fire each new load hot, do not allow the fire to burn at full intensity
for more than a few minutes.
THE STOVE SHOULD NOT BE LEFT UNATTENDED WHILE A NEW LOAD IS BEING FIRED
HOT.
DO NOT OVERFIRE.

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When a new load of wood is ignited, there will be a surge of heat from the stove. This heat
surge is welcome when the room temperature is a little lower than desirable, but not welcome
if the space is already warm. Therefore, each load of wood should burn completely so that the
space begins to cool off a little before loading. Letting the space cool before loading is one of
the secrets to clean burning and effective zone heating.
4.5.5 Controlling the Air Intake
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 stove and flue
pipe slows down, which increases the duration of the
energy transfer of the exhaust gases. As the air intake
is reduced, the flames slow 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.
Figure 9: Air Intake Control
4.6 Building Different Fires for Different Needs
Using the air intake control is not the only way to match the stove 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.
4.6.1 Small Fires to Take the Chill Off the House
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.
4.6.2 Long Lasting Low 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.