20
Adding wood
Be sure to re-open the flue gas valve before adding wood. This prevents too much flue gasses from entering
the room. After closing the door, you can close the flue-gas valve again.
Lighting the stove for the first time
Discolouration of walls, ceilings and grates
The walls, ceilings and grates may show some discolouration after lighting your stove. This is caused
by the dust particles that burn in the convection cover. WANDERS cannot be held responsible for this
natural process. To minimize discolouring we refer to the advice given for atmospheric hearths. Your
installer can give you more information about this.
When you light the Square for the first time, the stove must still ‘anneal’ and temper itself. The unit has a heat
resistant lacquer, which must burn in the stove at temperatures above 400°Celsius. This will happen during
the first few times of lighting the stove and temperatures rise to 600°C. Though this ‘annealing’ may give an
unpleasant smell, it is otherwise harmless. It is advisable to keep the stove burning with limited fuel for at
least 6 hours when lighting the stove for the first 4 or 5 times. Air the room well when the stove is burning.
Make sure that any cooking hood is not turned on when the stove is burning; a cooking hood extracts the
combustion air that the stove needs.
Some deposit may form on the glass of the stove when you ‘anneal’ your hearth. You can easily remove this
deposit with a damp cloth after the stove has cooled down. You can also use some cleansing agent for ceramic
rings. Please make sure you do not leave any finger marks on the clean glass. Finger marks burn into the glass
and cannot be removed later.
Newly built house or recently renovated?
It is advisable to wait six weeks before lighting the stove in a newly built house that has recently
been completed, or in a space that has recently been renovated drastically. The walls and ceilings
still contain gases, softeners and moisture from plasterwork or paint. The warm air-streams may
discolour the dust particles in the space, which may stick to walls and ceilings. Even the moisture in
the walls and ceilings will become warm and may cause yellow stains.
Fuel
Wood
Drying time
Fir, Poplar
1 year
Lime, Willow, Spruce, Birch, Ash, Alder
1,5 years
Fruit trees, Beech
2 years
Oak
2,5 years
The Square only burns on wood. Do not put more than 3 to 4 kg of fuel in the stove at the time. Always use
clean and cut logs that have sufficiently dried. Please see the above list for drying times. Wet wood does not
burn well and gives heavy smoke emission. It may blacken the glass of your stove with soot and build up smut
in the flue pipe. This may increase the risk of chimney fire.
Fresh, moist wood contains about 50% moisture. Cleaved wood still contains 20% moisture after drying it for
a year and moisture percentage will be decreased to 12 to 15% after drying it for two years. Dry wood gives
nice flames and little or no smoke, and the fire will crackle when burning. Wet wood makes a hissing sound,
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Summary of Contents for Square 75 Tunnel
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