Cozy Heat Standard Wood-Burning Sauna Stove – 12 & 18 kW

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. 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 D4,48 in 

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.  

2.1. 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 2.4 in / 2,36 inch thick. Make sure that there are no wires or water  pipes in the concrete cast below the stove. 

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

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The minimum safety distance between the top of the stove to the ceiling COZY 12- 45 in/ 44,48 in ,  COZY 18 – 52.8 in / 52,75 in. 

– Walls and benches made of inflammable materials. 

The minimum safety distances to inflammable materials: on either side COZY 12 -7in / 6,69 in and COZY  18 – 9.1 in / 9,05 in , behind the stove COZY 12 and 18 – 9.1in / 9,05 in , to the front COZY 12 and 18 – 20 in / 19,68 in. 

When using a protective wall, the distance from wooden surfaces can be reduced.4 

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– Masonry walls (MW) 

Leave 2in / 1,96 in 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 2 in / 1.96 in, 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 with mineral 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  – 11 in / 10,03 in , COZY 18 – 12.4 in / 12,40 in and the minimum height from the floor is COZY12 – 18 in / 17,32 in , COZY 18 – 18.5 in / 18,50 in. The maximum wall thickness is 5 in / 5,9 in.  

The minimum safety distances from wall opening to inflammable materials:  

– from sides of opening 20 in / 19,68 in; 

– upward from ceiling of opening 38in / 37,8 in;

When using a protective wall, the distance from wooden surfaces can be reduced.4 

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– Masonry walls (MW) 

Leave 2in / 1,96 in 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 2 in / 1.96 in, 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 with mineral 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  – 11 in / 10,03 in , COZY 18 – 12.4 in / 12,40 in and the minimum height from the floor is COZY12 – 18 in / 17,32 in , COZY 18 – 18.5 in / 18,50 in. The maximum wall thickness is 5 in / 5,9 in.  

The minimum safety distances from wall opening to inflammable materials:  

– from sides of opening 20 in / 19,68 in; 

– upward from ceiling of opening 38in / 37,8 in;

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. 

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– 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.  

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 7,5–5.9 in / 0,3 – 0,6 inch 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. 

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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 8–4.7 in / 3,15-4,7 in. Ignition load value is 2,8-7.9 lb / 6,18-7,9 lb depends of wood. It is  recommended to pick the 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. 

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+1in / 1,18+0,11 in 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 0.1 in / 0,07 in. 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 12–5.9 in / 4,72 – 5,9 in. 

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 0C/ 187 F 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 75 F) 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 

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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.  

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 3 in/2,95 inch 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. 

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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 vo*************@******at.ee 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 Performance H12 REV1 

In accordance with Construction Products Regulation 305/2011 EU (CPR) 

NPD= no performance determined 

1) installation of the stove only on non combustible floor or base 

2) an operating tool are supplied with stove 

Voldemar Nellis ( CEO )  

Signed for and on behalf of the manufacturer by: 

vo*************@******at.ee Tallinn, Estonia 01.12.2020 

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Declaration of Performance H18 REV1 

In accordance with Construction Products Regulation 305/2011 EU (CPR)