COZY 12 User manual

COZY 12 AND COZY 18
INSTRUCTION FOR INSTALLATION AND USE WOODBURNING STOVE
COZY COZY O COZY SW
COZY TW COZY O TW COZY SW TW
COZY OG COZY QUATTRO
COZY OG TW COZY QUATTRO TW
EN 15821:2010, BlmSchV DIN EN 13240, level 2

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Congratulations on your choice! The „COZY“sauna stove works best and serves
you longest when it is used and maintained according to these instructions.
Read those instructions carefully before installing or using the sauna stove!
The first heating must be performed outside or in a well-ventilated hot room, because the
final curing of the external heat-resistant paint of the sauna stoves is completed only after
heating and the curing process may give off an unpleasant burning smell. Avoid scratching
the sauna stove before that. It’s not recommended to fill the sauna stove with stones before
the first heating.
Technical data of the sauna stove
Sauna stove type
HEAT12 (COZY12)
HEAT18 (COZY18)
Model
COZY 12; COZY 12-TW; COZY 12
O; COZY 12 O-TW; COZY 12 SW;
COZY SW 12-TW; COZY 12 OG;
COZY OG 12-TW; COZY 12
QUATTRO; COZY 12 QUATTRO -
TW;
COZY 18; COZY 18-TW; COZY
18 О; COZY 18 O-TW; COZY
18 SW; COZY SW 18-TW;
COZY 18 OG; COZY OG 18-
TW; COZY 18 QUATTRO;
COZY 18 QUATTRO -TW;
Nominal heat Capacity.i.e. ability to
heat the room
12 kW
18 kW
Hot room size
6m³-12m³
9m³-18m³
Fuel
Wood logs with length up to 33
cm
Wood logs with length up to
40 cm
Fuel quantities to be added
3,6 kg in three parts
5,1 kg in three parts
Necessary draught
12 Pa
12 Pa
CO- emission( 13% Vol. O₂)
0,074% / 918 mg/m³
0,093% / 1164 mg/m³
Dust -emission
22 mg/m³
35 mg/m³
Overall efficiency
73,9%
81,3%
Flue gas average temperature
292 ᵒC
234 ᵒC
Weight of sauna stove without stones
49-72 kg
70-100 kg
Weight of sauna stove’s stones
100 -120 kg
140 -160 kg
Stone size (cm)
7,5cm-15cm
7,5cm-15cm
Minimum cross-section of ventilation
openings
10 200 mm²
10 200 mm²
Minimum cross-section of smoke flue
7 850 mm²
7 850 mm²
1. GENERAL
The „COZY“ sauna stove is intended for providing dry or humid heat in a sauna.
Our product range includes various modifications of the sauna stoves. The selection has round and
angular-shaped stoves. The stove can have a hot water boiler, a glass door and a wall penetration (TW
through the wall model).
The stones of the sauna stove must be large granite fieldstones or also sauna stove stones sold in
specialised stores.
Choose the stove model carefully. A stove with too low output must be heated longer and more
intensely, which will shorten the stove’s life span. Please note that non-insulated wall and ceiling
surfaces (such as brick, glass, tile and concrete surfaces) increase the output requirement of the stove.

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For every square meter of such wall and ceiling surface you should calculate an additional 1,2m³
volume. If the sauna walls are made of massive log, the volume must be multiplied by 1,5.
1.1. STOVE PARTS
1 - Outer frame of the heater - 5
different models
2 - Chimney pipe D114
3 - Heater body
4 - Upper cleaning hole
5- Cleaning hatch
6 –Heater door with glass
7 - Ash box
8 - Combustion chamber extension -
model TW
9 –Hearth frame (only TW is not
included)
10 - Stove stones (not included)
1.2. BURNING
The „COZY“type stoves have a special heater furnace construction separates combustion air
into three parts. Part of the air passes through the fireplace grate, second part of the
combustion air is directed through air channels to the middle part of the fire chamber and
third part of the combustion air is directed through the pipes located in the furnace ceiling to
the upper part of the fire chamber. This way, the flue gases also burn and generate heat. The
burning is cleaner and more efficient. Also the burning material ( 3.3.) and ignition method (
3.5.) significantly affect the burning efficiency and the flue gas emissions.
2. INSTRUCTIONS FOR INSTALLATION
2.1. Before Installation
Before installing the stove make sure that all safety distance requirements are fulfilled. There shall
be no electrical devices, wires or inflammable materials within the established safety distances
around the stove.
-The stove is not suitable for installation in a shared flue system.
-All local regulations, including those referring to national and European standards need to be
complied with when installing the appliance.
-The local fire authorities in charge of approving the installations can provide more detailed
information about fire safety regulations.
2.2. Ventilation of the Sauna Room
The ventilation of the sauna room should be arranged as follows:
The fresh air inlet must be placed above the stove and outlet should be as far as possible from the
stove and near the ceiling. The stove itself circulates air effectively; the purpose of this outlet is
mainly to remove moisture from the sauna after bathing. If you have through wall (TW) model, then
is very important to have outle from opposite wall of inlet near to floor (it have o be always opened
at bathing time.)
2.3. Protecting the Floor and safety distances
A. Concrete floor without tiles. The stove can be installed on a concrete floor without any specific
safety measures, if the concrete is at least 60 mm thick. Make sure that there are no wires or water
pipes in the concrete cast below the stove.

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B. Tile floor. The floor glues and plasters and waterproof materials used below the tiles are not
resistant to the heat radiation of the stove. Protect the floor with the protective bedding or similar
heat radiation protection.
C. Floor made of inflammable material. Protect the floor with the protective bedding If the floor in
front of the stove door is made of inflammable material, install floor protection made of
nonflammable material.
The stove shall be installed on a floor with an adequate load-bearing capacity. If the existing floor
does not meet this prerequisite, suitable measures (e.g. load distributing plate) shall be taken to
achieve it.
Light-coloured floor materials will become dirty from the ash, particles of stone and metal flakes
that fall from the stove. Use floor coverings made of dark materials and dark joint grouts.
- Ceiling. The minimum safety distance between the top of the stove to the ceiling COZY 12- 1130
mm, COZY 18 –1340 mm.
- Walls and benches made of inflammable materials.
The minimum safety distances to inflammable materials: on either side COZY 12 -170mm and COZY
18 –230 mm , behind the stove COZY 12 and 18 - 230mm, to the front COZY 12 and 18 - 500mm.

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Data
COZY
12/18
COZY 12/18 O
COZY 12/18
SW
COZY 12/18 OG
COZY 12/18
QUATTRO
to sides
170/230
to back
230/230
to front
500/500
to ceiling
1130/1340
L1*
470/625
480/585
500/580
505/615
475/585
L2*
510/580
520/630
540/650
545/655
515/630
L*
1200/1355
1210/1315
1230/1310
1235/1345
1205/1315
B1
430/500
450/505
490/550
498/560
440/515
B
770/960
790/965
830/1010
838/1020
780/975
H1
700/756
700/756
816/870
709/755
700/730
H
1830/2096
1830/2096
1946/2100
1839/2095
1830/2075
Weight , kg
49/72
49 /70
65/95
55/80
64/90
Weight (TW), kg
57/84
57/82
73/107
63/90
72/100
Stones weight**,
kg
110/160
110/160
120/180
120/160
120/160
* TW model add 150 mm.
** depending on the size of the stones.
When using a protective wall, the distance from wooden surfaces can be reduced to 85 mm.

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-Masonry walls (MW). Leave 50mm between the stove and walls what provided that the air can
circulate in front and to one side of the stove.
If the stove is installed into a recess made of non-flammable material (stone, concrete), then the
distance between the wall and the stove must be at least 50 mm, to allow for proper air movement.
There must be no electrical equipment or cables within the safety zone of the sauna stove.
2.4. Connecting the sauna stove to the smoke flue
As a rule, the „COZY“sauna stoves have the flue gas outlet opening on top of the sauna stove. Special
metal flue pipes must be used for connecting the sauna stove to the smoke flue; the flue pipe
connections must be sealed with heat-resistant sealing cord if necessary. Any bends in the connection
pipes must be round and wide, in order to ensure minimum obstructions of the chimney draught. The
flue pipe must enter through the chimney wall and it must be sealed withmineral wool. The connection
of the sauna stove to the smoke flue must be made by a specialist of the relevant field.
The sauna stove must not be modified without the manufacturer’s consent.
2.5. Models COZY TW (THROUGH THE WALL)
Installing the Stove in an opening in a concrete or brick wall
The stove is installed in an opening in a concrete or brick wall. The minimum width of the opening is
COZY12 - 255 mm, COZY 18 - 315mm and the minimum height from the floor is COZY12 - 440mm, COZY
18 –470mm. The maximum wall thickness is 150mm.
The minimum safety distances from wall opening to inflammable materials:
-from sides of opening 600mm;
-upward from ceiling of opening 960mm

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3. INSTRUCTION FOR USE
Read the instructions carefully before using the stove.
3.1. Warnings
-Staying in the hot sauna for long periods of time makes the body temperature rise, which
may be dangerous.
-Keep away from the stove when it is hot. The stones and outer surface of the stove may
burn your skin.
-Always use the delivered safety cloth/glove for grabbing the handle of the fire chamber
door when heating the stove.
-Never throw water on the stones when there are people near the stove, because hot
steam may burn their skin.
-Keep children away from the stove.
-Do not let young, handicapped or ill people bathe in the sauna on their own.
-Consult your doctor about any health-related limitations to bathing.
-Be very careful when moving in the sauna, as the platform and floors may be slippery.
-Never go to a hot sauna if you have taken alcohol, strong medicines or narcotics.
-Never sleep in a hot sauna.
-Sea air and a humid climate may corrode the metal surfaces of the stove.
-Do not hang clothes to dry in the sauna, as this may cause a risk of fire.
-NB! The sauna stove must be fired with wood logs only. Avoid overheating the sauna
stove; this would be indicated by the sauna stove’s shell starting to glow red. Overheating
deforms the metal and the manufacturer will not bear any liability for defects of the stove
resulting from that.
-Never throw salt water onto the sauna stove!
-It is not recommended to throw water with high hardness grade or excessive iron content
onto the sauna stove.

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3.2. Preparing the Stove for Use
The initial heating of a new sauna stove is recommended to do with half the stove-load of
firewood and without the stones; the room must be ventilated afterwards.
The purpose of the procedure is to burn off protective paint from the stove body. This will cause the
stove body to emit smoke with unpleasant smell.
1. If possible, heat the stove body outdoors until it stops emitting smoke. Install smoke pipes (if
any) for draught. Let the stove body cool.
2. Install the stove according to installation instructions. Place the stones into the stove
3. Heat the sauna to a normal bathing temperature. You should ensure good ventilation in the
sauna room as the stove body may still emit smoke and smell. When the smoking stops, the
stove is ready for normal use.
3.3. Burning Material
Dry wood is the best material for heating the stove. Dry chopped firewood clinks when it is knocked
together with another piece. The moisture of the wood has a significant impact on how clean the
burning is as well as on the efficiency of the stove. You can start the fire with birch bark or
newspapers. The thermal value of wood differs from one type of wood to another.
If you burn large amounts of wood, which has a high thermal value, the life span of the stove will
shorten!
Do not burn the following materials in the stove:
-Burning materials that have a high thermal value (such as chipboard, plastic, coal,brickets,
pellets)
-Painted or impregnated wood
-Waste (such as PVC plastic, textiles, leather, rubber, disposable diapers) - Garden waste
(such as grass, leaves)
-Liquid fuel
3.4. Sauna Stones
-The stones should be 7,5–15 cm in diameter.
-Only proper stones meant for the specific purpose should be used as sauna stones.
Peridotite, olivine-dolerite and olivine are suitable stone types. Stones found in nature may
contain harmful substances, such as iron pyrite, and therefore should not be used.
-Wash off dust from the stones before piling them into the stove.
Piling of the sauna stones:
1. Align the steel frame and the stove body. Place a few stones between the stove body and steel
frame so that the steel frame will not move during the placement of the stones.
2. Cover the stove body with stones. Place the stones in a dense layer between the stove body and
steel frame. Direct heat radiation from the uncovered stove body can cause the surrounding
structures to heat up to dangerous temperatures even outside the safety distances. Use stones that
fit easily between the steel frame and the stove body.
3. Fill the upper part of the steel frame with stones. Place the stones sparsely. Do not form a high
heap of stones above the frame.
4. Make sure that the stove body is not visible behind the stones after the stones have been placed.
If necessary, pile stones more densely and/or add stones.
3.5 Heating the Stove
1. Before heating the stove make sure that there are no unnecessary items in the sauna or inside
the stove’s safety distances.
2. Empty the ash box.
3. Place the firewood into the fire chamber, leaving enough room for the combustion air to flow
between the firewood. Place the biggest firewood on the bottom and the smaller ones on the top.
Use firewood with a diameter of 8–12 cm. Ignition load value is 2,8-3,6 kg depends of wood. It is
recommended to pickthe first stove-load of firewood (the ignition load) from smaller and easilyigniting
pieces of wood, thus having more air and less weight than the standard stoveload.

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FOR models TW (through the wall) stoves: Place the firewood on the grate at backof the fire
chamber. Avoid burning firewood in the fire chamber extension. Do not use excessively long
firewood even though they would fit in the fire chamber. Maximum lenght of log is 30+3cm
3. Place the kindling on the top of the firewood. By starting the fire on the top of the firewood,
fewer emissions are produced.
4. Fire the kindling and close the door. The flow of combustion air is regulated by changing the
position of the ash drawer (primary air inlet) and sizes of openings in the upper part of the stove
door (door openings- secondary air inlet). The recommended position of the ash drawer is open by 2
mm. The stove is not intended for use with the stove door open.
Note! The handles become hot while in use.
Use the supplied safety cloth for opening and closing the stove door and ash box.
During bathing, and when the sauna room is already heated, the ash box can be closed to keep down
the fire and decrease wood consumption.
5. If necessary, place more firewood into the fire chamber when the ember is dying down.
Use firewood with a diameter of 12–15 cm.
It takes only a couple of pieces of wood to maintain the bathing temperature.
Prolonged, intense heating may cause risk of fire!
-Excessive heating (several full loads in a row, for example) will make the sauna room, stove
and the chimney overheat. Overheating shortens the stove’s life span and may cause risk of
fire.
-A good rule of thumb is that temperatures of over 100 ºC are too high in a sauna.
-Observe the correct wood quantities noted in the heating instructions. Let the stove,
chimney and sauna room cool down if necessary.
It is recommended to have a set of handy stove accessories (shovel, brush, stove iron) in the lower-
temperature part of the hot room (up to 40°C) for cleaning the fire chamber and for safe operation of
the sauna stove. As a rule, the fire chamber door must be kept close during heating. The door can be
opened only for the time of adding firewood. With sauna stoves having a glass door, avoid getting
water on the hot glass. The hardened glass of the door is not covered by the product warranty. The
time needed for heating up the hot room depends on the heat conductivity of the wall materials, the
volume of the room and the heating capacity of the sauna stove.
3.6. Maintenance Stove
- The ash box should always be emptied before heating the stove so that the combustion air that is
lead through the box would cool off the fire grate and lengthen its life span. Get a metal container,
preferably standing model, to put the ash in. As the removed ash may include hot embers, do not
keep the ash container close to combustible material.
- Soot and ashes gathered in the smoke canals of the stove should be removed occasionally through
the soot opening.
- Due to large variation in temperature, the sauna stones disintegrate in use. Therefore, they should
be rearranged at least once a year or even more often if the sauna is in frequent use. At the same
time, any pieces of stones should be removed from the stone space, and disintegrated stones should
be replaced with new ones.
- Wipe dust and dirt from the stove with a damp cloth.
- The chimney and connection pipes should be swept at regular intervals and especially if the stove
has not been used in a long time.
- Due to incomplete burning of fuel and failure of sweeping the chimney, the soot build-up in the flue
may ignite.
Actions to be taken in case of a chimney fire:
1. Close the ash box, stove door and damper plate (if installed).
2. Contact local fire authority.
3. Do not try to extinguish fire using water.
4. After a sootfire, a chimney sweeper must check the stove and the flue before use.

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3.7. Troubleshooting
There is no draught in the flue. Smoke comes into the sauna.
-There are leaks in the flue connection. Seal the connection ( 2.4.).
-The brick flue is cold.
-There is low pressure caused by an extractor fan or another device in the room. Make sure
there is
-enough air to compensate.
-Several fireplaces are used at the same time. Make sure there is enough air to compensate.
-The ash box is full.
-The smoke canals of the stove are blocked.
-The flue connection pipe is too deep in the chimney.
The sauna does not heat up.
-The sauna is too big in relation to the stove’s heating capacity (see table 1).
-There is lots of non-insulated wall surface in the sauna.
-The burning material is moist or its quality is otherwise low ( 3.3.).
-The flue does not have a needed draught.
-The smoke canals of the stove are blocked.
The stove stones do not heat up.
-The sauna is too small in relation to the stove’s heating capacity ( see table 1).
-The flue does not have a good draught.
-The burning material is moist or its quality is otherwise low ( 3.3.).
-The smoke canals of the stove are blocked. Check the stone placement. Remove the
damadged pieces of stones and stones that are less than 7,5 cm in diameter from the stone
space. Replace the disintegrated stones with large and undamaged ones.
The stove emits smell. See section 3.2.
-The hot stove may emphasize odours mixed in the air that are not, however, caused by the
sauna or the stove. Examples: paint, glue, oil, seasoning.
Wooden surfaces of the sauna room blacken
-It is perfectly normal for the wooden surfaces of the sauna room to blacken in time. The
blackening may be accelerated by sunlight, heat from the stove, protective agents on the
walls (protective agents have a poor heat resistance level), fine particles disintegrating from
the sauna stones which rise with the air flow and smoke that enters the sauna, for example,
when adding firewood.
Product warranty
The sauna stoves have a manufacturer’s warranty of 24 months after the date of purchase, proven
by a purchase slip.
The warranty covers defects due to manufacturing errors.
The warranty does not cover the following effects caused by the joint effect of temperature and
steaming water:
• Metal deformations;
• Effects on surface covering;
• Effects on door glass.
Reclamations due to defects must be sent via e-mail to the address of voldemar.n[email protected]
or as paper mail to the address of Harku tee 7, Tabasalu, 76901 Harju maakond Estonia.
The reclamation must be accompanied by photographs of the places were the defect is apparent,
and by copies of the purchase documents of the sauna stove.

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DECLARATION OF CONFORMITY COZY 12
DoP HEAT 12
Product type and
models
HEAT 12
COZY 12; COZY 12-TW; COZY 12 O; COZY 12 O-TW; COZY 12 SW;
COZY SW 12-TW; COZY 12 OG; COZY OG 12-TW; COZY 12
QUATTRO; COZY 12 QUATTRO -TW;
Intended use
Multi-firing sauna stove fired by natural wood logs
COZY HEAT OÜ
Harku tee 7, 76901, Harku vald,
Estonia
The product conforms
to the following
standards
Products are tested accordance to the methods described in the
standard EN 15821:2010; First Ordinance for the
Implementation of the Federal Immission Control Act
(Ordinance on Small and Medium - sized Fire Facilities -
BlmSchV, 26.01.2010) for room heaters according to DIN EN
13240, level 2
Notified body (ID
number)
TÜV SÜD Industrie Service GmbH; Ridlerstrasse 65, 80339
Munich, Germany (0036)
Declared performance
Essential characteristic
Performance
Harmonised technical specification
to ceiling
1130 mm
EN 15821:2010
BlmSchV, 26.01.2010 DIN EN
13240, level 2
to sides
170 mm
to front
500 mm
to back
230 mm
Fire safety (initiation, risk to adjacent elements)
Pass 1)
Emission of combustible products
Pass
Surface temperature
Pass 2)
Release of dangerous substances
NPD
Cleanability
Pass
Flue gas temperature*
292 °C
Mechanical resistance
Pass
Thermal output
12 kW
Carbon monoxide emission (%) at 13 % O2
0,07%
Total efficiency
73,9%
Flue draught *
12 Pa
Ignition load and refuelling loads
2,4kg
Ash box gap (after ignition phase)
2 mm
Durability
Pass
Flue gas mass flow*
12,9 g/s
* Stove door closed
NPD = no performance determined
1) installation of the stove only on non combustible floor or base
2) an operating tool are supplied with the stove
Voldemar Nellis
Tallinn, Estonia 07.02.2019
CEO

11
DECLARATION OF CONFORMITY COZY 18
DoP HEAT 18
Product type and
models
HEAT 18
COZY 18; COZY 18-TW; COZY 18 О; COZY 18 O-TW; COZY
18 SW; COZY SW 18-TW; COZY 18 OG; COZY OG 18-TW;
COZY 18 QUATTRO; COZY 82 QUATTRO -TW;
Intended use
Multi-firing sauna stove fired by natural wood logs
COZY HEAT OÜ
Harku tee 7, 76901, Harku vald,
Estonia
The product conforms
to the following
standards
Products are tested accordance to the methods described in the
standard EN 15821:2010; First Ordinance for the
Implementation of the Federal Immission Control Act
(Ordinance on Small and Medium - sized Fire Facilities -
BlmSchV, 26.01.2010) for room heaters according to DIN EN
13240, level 2
Notified body (ID
number)
TÜV SÜD Industrie Service GmbH; Ridlerstrasse 65, 80339
Munich, Germany (0036)
Declared performance
Essential characteristic
Performance
Harmonised technical specification
to ceiling
1340 mm
EN 15821:2010
BlmSchV, 26.01.2010 DIN EN
13240, level 2
to sides
230 mm
to front
500 mm
to back
230 mm
Fire safety (initiation, risk to adjacent elements)
Pass 1)
Emission of combustible products
Pass
Surface temperature
Pass 2)
Release of dangerous substances
NPD
Cleanability
Pass
Flue gas temperature*
234 °C
Mechanical resistance
Pass
Thermal output
18 kW
Carbon monoxide emission (%) at 13 % O2
0,093%
Total efficiency
81,3%
Flue draught *
12 Pa
Ignition load and refuelling loads
5,1kg
Ash box gap (after ignition phase)
2 mm
Durability
Pass
Flue gas mass flow*
9,1 g/s
* Stove door closed
NPD = no performance determined
1) installation of the stove only on non combustible floor or base
2) an operating tool are supplied with the stove
Voldemar Nellis
Tallinn, Estonia 07.02.2019
CEO