Drooff elba User manual


INSTRUCTIONS FOR INSTALLATION
AND OPERATION


DROOFF Kaminöfen — Feuer aus dem Sauerland
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INSTRUCTIONS FOR INSTALLATION AND OPERATION
Dear Customer,
No doubt you have taken time and trouble in choosing your new
stove. Important features such as an attractive design to match
your furnishings, sufficient heating capacity, clean combustion
technology which does not harm the environment and, last but
not least, reasonable price. These are all important factors to
be carefully considered.
Since you have decided in favour of a DROOFF stove, it seems
that we fulfil all your criteria. Thank you for your confidence
in us.
We have done everything possible to ensure that you have las-
ting pleasure in your new stove. High quality materials, excellent
workmanship and strict monitoring of the production process
are the best guarantees for a long life span.
To ensure lasting enjoyment of your DROOFF stove, read these
instructions carefully and put them into practice. Incorrect
operation, unsuitable fuel, overheating and lack of care and
attention may cause damage which is not covered by our guaran-
tee. Pay particular attention to the safety instructions in this
booklet. Being well informed is the best way to avoid risk and
prevent damage.
We wish you years of pleasure from your DROOFF stove with
many cosy hours in front of a crackling fire.
Your DROOFF team

DROOFF Kaminöfen — Feuer aus dem Sauerland
INSTRUCTIONS FOR INSTALLATION AND OPERATION Page 3
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Contents
Foreword 2
Instructions for installation 4
Taking delivery of the stove 4
Correct location 4
Chimney 5
n Connection to chimney 5
For your safety 6
Operating instructions 7
Door lock 7
Suitable fuels 8
Wood — our fuel 8
n Logs 9
n Preparation and storage 10
n Lignite briquettes 10
Fuel Quantities 11
Function of stove 11
First heating up 12
Correct operation 13
Operation between the seasons 13
Environment 14
Maintenance 14
Care and cleaning 14
n Cleaning the glass surfaces 14
n Cleaning lacquered surfaces 15
n Cleaning the fire chamber 15
n Disposing of ash 15
n Maintenance of seals 15
n Cleaning the fire chamber
and connection piece 15
n Special note on care and maintenance 16
Technical information 17
General information 18
Distance to combustible materials 19
Rated thermal output 20
Thermal output range 20
Room heating capacity 21
Approved fuel types 21
Fuel quantities 21
Regulating the combustion air 21
Firing up 22
Maximum thermal output 22
External air supply 22
Test certificates 23
Certification 24
Declaration of conformity 25
Guarantee 26
Avoiding mistakes 27
Important note 27

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INSTALLATION
TAKING DELIVERY OF THE STOVE
Please check carefully that the stove is in perfect condition. Make sure that it has not been
damaged in transit. Pay particular attention to the glass door and the fireclay bricks inside.
Should you discover any damage, please inform your supplier at once. Do not light a fire
in the stove.
Damage sustained by the glass door and the fireclay bricks after the stove has been
used is almost always caused by overheating or incorrect operation. In such cases, the
manufacturer‘s guarantee will not apply and we will not be liable for any damage.
CORRECT LOCATION
n When choosing the location for your stove, make sure that it can be connected easily to
the chimney in your house. Before installing the stove make sure you are aware of all the
applicable national and local building regulations.
n DROOFF stoves are normally delivered with an interchangeable connecting sleeve which
makes it possible to fit the stovepipe both from the rear and from above (see data sheet
"Technical Information"). As a rule, your stove will be prepared for connection from the
top. However, if you prefer a different connection, replace the connecting sleeve with the
sealing lid. It is extremely important that the opening which is not in use is firmly sealed
with the lid.
n The floor under the stove must be flat and level. Before installing the stove, make sure that
the floor is able to bear the weight.
n The floor under the stove must be resistant to heat and non-combustible (e.g. tiles or
special floor plate). This non-combustible area must extend at least 50 cm in front of the
stove and at least 30 cm to the side, measured from the front of the door.
n The stove and the connecting pipe must be at a certain distance from combustible
materials at the back and at the sides. They must also have a certain clearance from steel-
reinforced concrete walls. For the necessary safety clearances for your stove, please refer
to the data sheet "Technical Information" or the plate attached to the back of the stove. For
the necessary safety clearances for the connecting pipe, please refer to the data supplied
by the pipe manufacturer.
n Always ensure that no combustible objects or objects sensitive to heat are placed close
to the glass door. See data sheet "Technical Information" for adequate clearances.

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CHIMNEY
The stove functions by a simple principle of physics i.e. that hot gas rises. This means that the
smoke and hot gas produced by the fire rise up through the chimney while fresh air for com-
bustion is sucked into the fire chamber from the room or from outside (with stoves fitted with
an outside air inlet). The upward draught from the chimney is therefore the "motor" of the stove.
This draught is affected by a number of factors such as the cross section (wideness) of the
chimney, its height and its insulation as well as the temperature outside the house.
Every stove has its own characteristics. Deflection (i.e. changes in direction) of the smoke gas
improve the efficiency of the stove but also creates resistance. The temperature and quantity of
smoke gas produced differs from one stove type to another. Every stove therefore makes its own
demands on the chimney. It may well happen that a good stove and a functioning chimney are
incompatible and have to be adapted to one another. Always ask your stove dealer or a heating
engineer if your chimney is suitable for your stove.
n Connection to chimney
The planned connection of a stove to a chimney must be approved according to national and
local building regulations and carried out by a qualified engineer. The connection must also be
officially tested before the stove is put into operation.
DROOFF stoves are all designed according to type 1 with a self closing door to the fire chamber.
They can be connected without difficulty to a suitable chimney which is already in use.
The components required for connecting the stove to the chimney are not supplied with the
stove. These components can be obtained from your dealer. For the correct diameter for the
connecting sleeve of a DROOFF stove please refer to the attached data sheet "Technical
Information". Smoke pipes complying with the standard EN 1856-2 are suitable for use with
the stove. Always ensure that the smoke pipe is installed at the correct safe distance from
combustible substances and materials.
Wood burning stoves are technically complex devices. They function efficiently and safely only
when installed and connected to a suitable chimney in accordance with all technical rules and
regulations.
You are therefore advised to have your stove installed and connected to the chimney
by a qualified engineer.

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INSTALLATION
n Important notes for connecting the stove:
n The measurement of the chimney must comply with EN 13384, parts 1 and 2.
n Comply with the standard DIN 18160.
n For the minimum suction pressure, see data sheet "Technical Information". The maximum
suction pressure is 20 Pa. For pressures higher than 20 Pa, pressure restriction is required.
n All smoke pipe connections must be absolutely free of leaks.
n The smoke pipe must not project into the chimney.
n Connections for other smoke outlets (fireplaces etc.) must not be at the same level or lie
opposite one another in the chimney. The minimum distance is 40 cm.
n When the smoke pipe is connected to the top of the stove its height must not exceed
150 cm. Always observe the correct safe distance from ceilings, ceiling panelling etc.
For the correct dimensions and data for connecting the stove to the chimney, refer to the
data sheet "Technical Information".
SAFETY
n Read these instructions through carefully to find out how to operate the stove safely.
n For the set up, connection and operation of the stove, always observe all applicable national
and European standards as well as all applicable local regulations. If in doubt, consult
your dealer or a qualified heating engineer.
n Check again to ensure that the stove has been correctly connected to the chimney.
n When the fire is burning, the outer surface of the stove becomes very hot. Keep children
and animals under supervision.
n When the fire is burning, make sure that there are no combustible materials or substances
near the stove or on the stove.
n Keep the door to the fire chamber closed at all times, even when the fire is not burning.
(Exception: when heating the stove for the first time).
n Do not overheat the stove by using too much fuel as this may damage the stove or the
chimney and entail loss of guarantee rights.
n Never use petrol, paraffin, methylated spirit or other dangerous substances to light the fire.
n Do not place objects made of combustible material in area affected by radiant heat from
the stove, i.e. within a radius of about 85 cm of the glass door.
n Make sure that the ash box is never completely full as this prevents sufficient air from
reaching the fire and may cause the bottom grate to overheat and warp.
(continued on page 7)
Please read the following before lighting the fire!

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n Make sure that enough fresh air can flow into the stove. Remember that your stove
needs about 4 m3 of air to burn 1 kg. of wood!
n If a kitchen fume extractor is being used in the same or in a neighbouring room, this may
reduce the air pressure around the stove and cause smoke gases to leak out into the room.
It is recommended to install a window contact switch for the fume extractor. Consult your
heating engineer on this subject.
n Do not remove the ash when it is hot. Store the ash in non-combustible containers only.
Do not place such containers on combustible or heat sensitive surfaces.
n For the correct distances between the stove and combustible or valuable objects, refer to
the data sheet "Technical Information" or the plate mounted on the stove.
OPERATING INSTRUCTIONS
DOOR LOCK
Opening the door
1. Press the knob on the handle down (figs. 1 and 2)
2. Press the pedal to release the lock (fig. 3)
Closing the door
1. To ensure that the door is safely locked,
open the door half way and allow it to fall back into the closed position.
(fig. 1) (fig. 2) (fig. 3)

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OPERATING INSTRUCTIONS
SUITABLE FUELS
For information on the fuels approved for use in your DROOFF stove, refer to the data sheet
"Technical Information" or the plate mounted on the stove.
Wood — our fuel
There are many reasons why wood is an important raw material and source of energy. It is a
renewable material which grows "at our own front door". Our forests are cultivated sustainably,
i.e. the same amount of wood matures at any given time as is harvested or burned. Whether
the wood is burned or lies on the ground and rots, it emits only the same amount of CO2 as
the tree has absorbed during its life. Wood is also cheaper than oil or natural gas. A wood-
fired stove is therefore the most effective way of keeping heating costs down.
n Logs
Use only dry wood! Logs have to be stored in the open air for a period of 1.5- 2.5 years to
achieve a residual moisture content of between 15% and 20% which is most suitable for burning.
To measure the residual moisture content of wood, use a standard moisture measuring instru-
ment which you can purchase from your dealer. The calorific value of wood depends to a great
extent on its quality and moisture content. The more water it contains, the more heat is
required for its evaporation during combustion. That means that the damper the wood is, the
lower its calorific value.
Freshly cut wood contains a lot of moisture and therefore burns badly. The heat it gives off
(i.e. its calorific value) is low and it pollutes the atmosphere. In addition, the high amounts of
conden sation and tar in the smoke gas lead to undesirable deposits in the stove and the
chimney and obscure the glass window more quickly.
The calorific value of wood differs from one type of wood to another. In relation to their weight,
the calorific value of soft woods such as spruce, pine or fir is considerably higher than that of
harder woods such as birch, oak or beech. However, in relation to their volume, it is the harder
woods which have a higher calorific value.

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The calorific values of different wood types is shown in the following table:
Hard wood kWh per kg Soft wood kWh per kg
Birch 4.30 Spruce 4.50
Beech 4.00 Pine 4.40
Oak 4.20 Fir 4.50
Soft wood burns faster than hard wood and achieves higher temperatures. This is due mainly
to the high resin content. However, for heating purposes, the slower and more lasting develop-
ment of heat is generally desired. The suitability of a certain type of wood therefore depends on
the user‘s purpose. Harder woods burn more slowly and supply energy over longer periods of
time. This may be useful for overnight heating. On the other hand, the more rapid combustion
and faster energy emission of soft wood may be more suitable for heating cold rooms more
quickly.
n Preparation and storage
Wood needs time to dry. When stored correctly, wood has a residual moisture content of 19%
after between 1.5 and 2.5 years. It is then "air dry" or seasoned.
Useful tips:
n Saw and split the wood before stacking it. This helps it to dry more quickly.
n Stack your firewood in a sunny well ventilated place where it is sheltered from rain.
n Leave a gap between the stacks to allow the air to circulate and remove moisture.
n Do not cover the wood with plastic sheeting. This prevents moisture evaporating.
n Do not stack fresh wood in basement rooms. The low air circulation will cause it to rot
rather than dry.
n Keep some wood close to the stove to warm it up to room temperature.

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OPERATING INSTRUCTIONS
n Lignite briquettes
Standard shaped lignite or brown coal briquettes may also be used if this is stated in the
list of approved and tested fuels for your particular stove or are listed on the metal plate
mounted on the stove. You will heat your house without unnecessary air pollution only if you
use the approved fuels mentioned in this booklet. You can also further reduce emissions by
stoking your stove with the quantities stated in the data sheet "Technical Information".
Burning the following types of fuel in your stove is prohibited by law:
n Damp wood and wood treated with preservatives
n Painted wood and wood coated with synthetic material
n Wood chippings
n Bark and chipboard waste
n Coal dross
n Waste
n Paper and cardboard (except for lighting)
Remember: a wood burning stove is not a rubbish incinerator! The burning of rubbish
and waste is prohibited. This pollutes the environment and damages your stove. Use
only well seasoned suitable types of wood and (if stated explicitly) lignite briquettes.
FUEL QUANTITIES
To avoid unnecessary air pollution, stoke your stove only with the quantity of fuel you actually
need for your heating requirements.
To achieve the rated heating capacity of your stove you need only 2-3 logs or 3-4 lignite
briquettes. For more detailed information refer to the data sheet "Technical Information".
Depending on the weather, chimney draught, wood quality and the position of the adjusting
slide on the stove, one stoking of wood will burn down to a red glow in about 30-45 minutes.

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FUNCTION OF STOVE
n Primary air is required for heating up the stove and for burning mineral fuels e.g. lignite
briquettes. The primary air is sucked into the fire chamber from below, in most cases
through the grate.
n Secondary or "glass cleaning" air is required for burning long-lasting materials such as
logs, wood briquettes and lignite briquettes. Secondary air enters the fire chamber from
above. It also serves to keep the glass window clean for as long as possible (see notes on
page 14).
n Tertiary air is additional secondary air. With most stoves, the tertiary air is set by the
manufacturer and cannot be changed. However, this varies from one stove to another.
n Depending on type, DROOFF stoves are fitted either with a shaker grate or a fixed grate.
The primary air flowing through the grate to the fire helps to cool the grate. For this reason
it should be kept free at all times.
n All DROOFF stoves are fitted with an ash box. The ash falls through the grate into the box.
The amount of ash created depends on the type and amount of fuel burned and should
be emptied every few days.
n DROOFF stoves are designed according to type 1. This indicates a simple but effective
safety system. Should you forget to close the stove door after stoking it, it will close auto-
matically thereby preventing burning wood from falling out. However, always make sure that
the door to the fire chamber is properly closed at all times.
n Most DROOFF stoves can be connected to an external source of fresh air. An external air
supply is generally required when the space where the stove is standing is very confined. In
this case, most of the air is supplied to the fire chamber from outside. A qualified heating
engineer will tell you whether an outside connection is necessary in your case.
Important note: if your stove does not receive air from outside, make sure that the room
has a sufficient supply of fresh air. The stove requires approximately 4 cubic metres of
air to burn 1 kg of wood!

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OPERATING INSTRUCTIONS
FIRST HEATING UP
Always keep the stove under supervision when the door of the fire chamber or the ash
box are not firmly closed!
Before lighting the fire for the first time make sure you have removed all the accessories from
inside the stove or the ash box. Make sure that there is nothing on top of the stove and that
the convection openings are not obstructed. Open the doors and windows to ensure sufficient
ventilation. The reason for this is that the stove is coated with a heat resistant lacquer which
only achieves its final hardness after about one day‘s burning at the rated heating capacity
of the stove. This may produce an unpleasant smell which disappears when the lacquer has
hardened. When the fire is lit for the first time, allow the door to fall back into position but do
not lock it. This prevents the sealing cord from adhering to the lacquer. This also applies for
the ash box. Remember! Keep a watchful eye on the on the stove for as long as the door to
the fire chamber or the ash box are not firmly locked into position!
n Open the primary and secondary air slides completely. Leave them open during the whole
of the first warm up.
n Take the kindling material (not petrol, paraffin etc.) such as standard fire lighters and lay
small pieces of wood on the grate. Light the fire lighters.
n As already mentioned, close the door but do not lock it into position.
n At this point the stove system is still cold, i.e. the stove, stovepipe and chimney have not
yet reached the desired operating temperature. By leaving the door slightly open during
the kindling phase you assist this whole process. When you add more material to the
flames some smoke may escape into the room.
n Allow the first pieces of wood to burn down until there is only a red glow. Open the door
slowly to allow the pressure on both sides to equalise and prevent smoke from escaping.
n Do not re-stoke with fresh fuel too soon. Avoid a pile up of hot glowing embers on the
grate through stoking too soon. This may cause damage by overheating.
n If necessary remove ash by shaking the grate or raking it through.
The stove must remain in operation for a number of hours until the lacquer has
hardened completely.

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CORRECT OPERATION
n If necessary remove the ash from the fire chamber and empty the ash box if it is full.
n Close the door of the ash box or push the box firmly into position.
n For routine use of the stove (i.e. the stove lacquer has fully hardened), light the fire as
described above. Leave the door open slightly until the fire is burning briskly. Then close
it firmly.
n Do not re-stoke with fresh fuel until the fire has burned down to the glowing embers.
Open the door slowly to allow the pressure to equalise and prevent smoke from escaping.
n Depending on the draught of your chimney and the type of fuel used, the flow of primary
and secondary air must be adjusted during the burning process. For information on the
correct adjustment, refer to the data sheet "Technical Information". As a rule, the primary
air slide is kept completely closed so that no air reaches the flames from below. The
secondary air slide on the other hand remains open. Depending on the weather, chimney
draught, wood quality and the position of the adjusting slide on the stove, one stoking of
wood will burn down to a red glow in about 30-45 minutes.
n Then re-stoke again and proceed as described above.
Important note: do not control the heat emitted by your stove by the position of the
air slides only, but also by varying the amount of fuel as required.
OPERATION BETWEEN THE SEASONS
At an outside temperature of approx. 15° C or higher, it may become more difficult for your
stove to function properly. The small difference in temperature tends to reduce the upward
draught in the chimney, making it difficult to light the fire and to "get it going". In addition,
greater quantities of smoke is produced which cloud the window with soot and billow into the
room if the stove door is opened.
If it is difficult to light the fire, try burning a crushed up sheet of newspaper. This produces
a short lived upward draught of hot air which may help to dissipate the smoke in the fire
chamber.
When outside temperatures are still relatively high, make sure that enough air is available
for combustion. Open the primary and secondary air slides more than usual and ensure that
there is not too much ash on the grate. Avoid slow burning of the fire and empty the ash box
more often.

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OPERATING INSTRUCTIONS
ENVIRONMENT
Heating with wood reduces air pollution because wood is simply stored up solar energy.
If it is properly operated, your stove will always comply easily with even the strictest Euro-
pean regulations. However, this is largely dependent on the way you use it and on the
type of fuel you burn. Always adhere to this instruction booklet. Burn only well seasoned
wood or (if approved) lignite briquettes.
Do not just use the air slides to control the heat emitted by the stove, but vary the
amount of fuel you burn according to your needs.
MAINTENANCE
Good care and maintenance are essential to ensure the long life span and efficient function
of your stove. We recommend that you have your stove checked once a year by a qualified
heating engineer. Your dealer will also be pleased to do this on request.
CARE AND CLEANING
Clean your stove only after it has cooled down completely and contains no hot embers
or ash.
n Cleaning the glass surfaces
DROOFF stoves are designed in such a way that the secondary air blows the smoke away from
the inside of the glass. If the stove has been correctly installed, the chimney conditions
are suitable and the correct type of fuel is used, the inside of the glass will require very little
cleaning. However, slight clouding cannot always be avoided. On the other hand, if the wood is
not dry enough or the chimney draught not strong enough the glass will soon be coated with
soot. The glass surfaces are easiest to clean with a dry soft cloth or if necessary, mild glass
cleaning fluid.
Do not clean the glass window with abrasive materials or scraping tools. This may cause hair
line cracks to develop in which soot will accumulate which is difficult to remove.
Very stubborn dirt can be removed with special stove glass cleaners which are available from
your dealer.

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n Cleaning lacquered surfaces
To remove soot from lacquered surfaces, use only a soft dry cloth. Do not use abrasives,
solvents or similar substances. Remember that your stove may be lacquered, but it is not
entirely rustproof.
If the stove is overheated, a slight grey discolouration may appear on the outer surface.
Discoloured areas can be retouched using a standard heat resistant stove lacquer. This may
produce an unpleasant odour until it has hardened fully. Make sure that the room is well
ventilated.
n Cleaning the fire chamber
Clean the fire chamber regularly (or whenever required) and empty the ash box. The amount
of cleaning will depend on the type of wood burned and on how frequently the stove is used.
n Disposing of ash
To remove ash from the fire chamber, use a small shovel or similar tool. Metal ash containers
which can be attached to a vacuum cleaner are excellent for this purpose. Make sure that
the ash has cooled down and contains no hot embers. Use only fireproof non-combustible
containers to store the ash. Do not place these containers on combustible or heat sensitive
surfaces. If in doubt, consult your dealer.
CAUTION! Do not put the ash in a rubbish bag or use a vacuum cleaner without an
intervening ash container made of metal.
n Maintenance of seals
The seals on doors and glass windows are subject to wear and tear due to continuous expo-
sure to heat. Check them regularly and replace them at least once a year, or ask your dealer
to do this.
n Cleaning the fire chamber and connection piece
Using a vacuum cleaner or small brush, clean the interior of the fire chamber and the
connection area to the stove pipe at least once per year.

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OPERATING INSTRUCTIONS
n Special note on care and maintenance
n Check the tightness of the nuts on the glass retaining flanges regularly (about twice
a year). Tighten loose nuts by hand or with a special key. Do not over tighten! (fig. 1).
n If the door becomes stiff, grease the closing mechanism slightly with a special heat
resistant grease (heat resistance up to 1100°C, e.g. copper paste). (fig. 2).
(fig. 1)
(fig. 2)
n Cracks in the fireclay brick are unavoidable due to continuous exposure to heat.
Under normal conditions these do not adversely affect the function or durability of
the stove.
Your stove is tested by the manufacturer to the standard EN 13240. It must not be
modified in any way as this may lead to loss of approval for use and render the guarantee
invalid.

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TECHNICAL INFORMATION
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TECHNICAL INFORMATION
GENERAL INFORMATION
Front view
View from side
View from above
TESTS 4.0 kW 8.0 kW
EN 13240 RRF - 40 10 2454 RRF - 40 10 2406
Münchener Model Yes Yes
BImSchV Yes Yes
15a B-VG - RRF - AU 10 2406
VKF approval/ LRV Switzerland Pending Pending
TRIPLE VALUES 4.0 kW 8.0 kW
NWL 4.0 kW 8.0 kW
Exhaust gas mass flow rate 3.6 g/s 6.2 g/s
Av. exhaust gas temp. 300 °C 330 °C
Min. suction pressure 0.12 mbar 0.12 mbar
GENERAL TECHNICAL VALUES
Room heating capacity Approx. 182 m3
Thermal output 3 - 10 kW
Minimum clearances (cm.) H=15, S = 20, F =85
TECHNICAL VALUES 4.0 kW 8.0 kW
CO emission 1250.0 mg/Nm31250.0 mg/Nm3
Dust < 40.0 mg / Nm3< 40.0 mg/Nm3
Efficiency 82.5 % 82.9 %
TECHNICAL FITTINGS
Primary air Adjustable
Secondary air Adjustable
Fire chamber Moulded fireclay brick
Fire chamber Hx W x D 500 x 310 x 300 mm
Grate Fixed, cast iron
Ash box Yes
Connection Replaceable sleeve; Ø 150 mm
Outside air connection At bottom rear; Ø 100 mm
Multi-point safety lock Yes
DESIGN
Body Grey iron, black
NatStone/SandStone -
Stove tiles -
Steel version -
Accessories Topstone: NatStone, sand-blasted
WEIGHT
Stove body Approx. 134 kg
With NatStone/SandStone -
With stove tiles -
Steel version with NatStone -
Steel version with tiles -
Accessories Topstone: NatStone: approx. 23 kg
APPROVED FUEL TYPES Wood, wood briquettes, lignite briquettes
Safety clearance to inflammable materials/partition walls
Rear 15 cm
Side 20 cm
Front 85 cm
Performance parameters Logs/ Wood briquette Lignite briquettes
Rated thermal output in kW 4.0 8.0 8.0
Thermal output range in kW 3 - 10 3 - 10
Exhaust gas mass flow in g/s 3.6 6.2 7.0
Temp. at chimney sleeve in °C 300 330 345
Suction pressure in mbar 0.12 min. 0.12 min. 0.12 min.
0.20 max. 0.20 max. 0.20 max.
CO emission in mg/Nm31250.0 1250.0 2000.0
Dust emission in mg/Nm3< 40.0 < 40.0
Efficiency in % 82.5 82.9 78.9
(All data is laboratory data)

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DISTANCE TO COMBUSTIBLE MATERIALS
For your own safety it is essential to observe the above distances between the stove and
combustible or valuable objects e.g. furniture, panelling, wood etc. as well as structural walls
of steel reinforced concrete. The distance between the stove and non-combustible materials
or objects may be slightly less. These clearances are required for compliance with the
regulations applicable in Germany for fireplaces, stoves and other heating appliances.
In spite of compliance with the above safety clearances, the stove may cause discolouration
of sensitive materials in its vicinity e.g. wallpapers containing vinyl, textile or other structuring
substances. These discolourations are due to the quality of the materials and are not covered
by the guarantee. The specified safety clearances between the stove and inflammable or
valuable objects are intended only to prevent the outbreak of fire.
Safety clearance to inflammable materials/partition walls
Rear 15 cm
Side 20 cm
Front 85 cm
20 cm
15 cm
85 cm
85 cm
20 cm
15 cm
15 cm
20 cm
Back wall
Side wall
Back wall
Side wall
Position near wall
Corner position
Performance parameters Logs/ Wood briquette Lignite briquettes
Rated thermal output in kW 4.0 8.0 8.0
Thermal output range in kW 3 - 10 3 - 10
Exhaust gas mass flow in g/s 3.6 6.2 7.0
Temp. at chimney sleeve in °C 300 330 345
Suction pressure in mbar 0.12 min. 0.12 min. 0.12 min.
0.20 max. 0.20 max. 0.20 max.
CO emission in mg/Nm31250.0 1250.0 2000.0
Dust emission in mg/Nm3< 40.0 < 40.0
Efficiency in % 82.5 82.9 78.9
(All data is laboratory data)

DROOFF Kaminöfen — Feuer aus dem Sauerland
Page 20
www.drooff-kaminofen.de
TECHNICAL INFORMATION
RATED THERMAL OUTPUT
The actual thermal output of a stove depends on the amount of fuel with which it is actually
stoked.
The "rule of thumb" is: 1 kg wood = 3 kW heat output.
The rated thermal output is stated on the plate attached to the stove. The rated thermal
output is the thermal output which is determined by testing a stove to EN standard and then
stated by the manufacturer. To achieve this rated output, a certain defined amount of fuel has
to be burned. This amount is stated in the data sheet "Technical Information".
THERMAL OUTPUT RANGE
Every wood burning stove has a range of thermal outputs. Your stove will also function
perfectly at ouputs which are less than the rated output. The high quality of DROOFF stoves
even permits outputs which are slightly higher than that rated. Less fuel means a lower
output, more fuel, a higher. This flexibility makes our stoves more economical. The thermal
output range is stated in the current instruction booklet.
Ensure that your stove is not overheated either for shorter or longer periods of time. Damage
caused by overheating is not covered by the guarantee. Please refer to the section entitled
"Guarantee". Always operate your stove according to the instructions and stoke it only with
the correct amounts of fuel i.e. no more than you need for your actual requirements. Do not
use only the air slides to control the heat emitted by the stove, but also vary the amount of
fuel you burn.
The stove is designed for intermittent use. Do not overheat it, even for short periods of time.
Room-heating capacity in m34 kW 8 kW
Heat requirement suitable 62 182
less suitable 39 105
unsuitable 25 71
Quantity Logs Wood Briquettes Lignite Briquettes
For 4 kW approx.: 1.0 kg / h 1.0 kg /h -
Per stoke approx.: 0.8 kg 0.8 kg -
For 8 kW approx.: 2.1 kg / h 2.1 kg/h 1.7 kg /h
Per stoke approx.: 1.6 kg 1.6 kg 1.7 kg