Fuel - Heta Vista Operating And Installation Instructions

12 PA - Vista S. It is the draft that the stove has
been tested and approved on.
The minimum draft is necessary to provide clean
burning, beautiful flame picture, as well as
achieving the rated efficiency.
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There is a risk of smoke escaping into the room
if the door is opened during vigorous firing, or if
there is a lack of air supply to the room, for ex. if
an extraction fan is in use.
Flue gas temperature at the rated output is 265°C
- Vista and 252°C - Vista S relative to 20°C.
Flue gas flow is 6,0 g / sec. - Vista and
5,0 g / sec. - Vista S
The chimney height and diameter, as well as
the temperature difference between the flue gas
and outside temperature generates the chimney
draft. Chimney insulation is therefore important
as new efficient stoves create lower flue tempe-
ratures. Wind and weather conditions also in-
fluence draft, in some cases it may be disad-
vantageous wind direction, combined with the
position of the chimney can cause negative draft
(it blows through the chimney), causing smoke
escape from the stove.
Before using after a long period of inactivity,
check that the chimney is free for any blocka-
ges. (soot build-up, bird nests, leaves etc.).
reduced draft can occur when:
• The temperature difference is too small
between smoke gasses and outdoor
• To short of a chimney
• The outside temperature is high, and indoor
temperature is low f. ex. in summer
• False air in the chimney
• Chimney is blocked
• Air tight house (lack of combustion air supply)
• Poorly placed chimney for the surroundings,
for ex. the ridge and trees may cause
turbulence.
Good draft occurs when:
• The difference in temperature in the chimney
• It is clear weather
• The chimney has the right height min 4 meters

1.10 fuel

Your new stove is EN approved for firing with
wood fuel. You must therefore only burn clean,
dry wood in your stove. Never use your stove
Combustion
air
to burn driftwood, as this may contain a lot of
salt which can damage both the stove and the
chimney. Similarly, you must not fire your stove
with refuse, painted wood, pressure-impregna-
ted wood or chipboard, as these materials can
emit poisonous fumes and smoke.
Correct firing using well seasoned wood pro-
vides optimal heat output and maximum effi-
ciency. At the same time, correct firing prevents
environmental damage in the form of smoke
emissions and reduces the risk of chimney fires.
If the wood is damp and inadequately seasoned,
a large proportion of the energy in the fuel will
be used to vaporize the water, and this will all
disappear up the chimney. Thus, it is important
to use dry, well seasoned wood, i.e. wood with a
moisture content of less than 20 %. Achieve this
by storing the wood for 1–2 years before use.
Pieces of firewood with a diameter of more than
10 cm should be split before before storing. The
pieces of firewood should be of an appropriate
length (approx. 19-25 cm - Vista and approx. 20
cm - Vista S) so that they can lie flat on the bed
of embers.
If you store your wood outdoors, it is best to
cover it.
examples of fuel values
for different woods and their typical densities
per cubic meter, specified for 100% wood with
a moisture content of 18%.
Wood
Beech
Oak
Ash
Elm
Maple
Birch
Mountain pine
(warmer) and outside temperature (colder)
above the stove, and clear of the roof ridge.
kg/m
3
710
700
700
690
660
620
600
Willow kg/m
3
Wood 560
Alder 540
Scotch pine 520
Larch 520
Lime 510
Spruce 450
Poplar 450
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