Combustion
air
Combustion
air
6
10
Warning!
One must always use cation around
the stove seen, as it gets very warm
during use. (In excess of 90° C).
Children should avoid contact with the stove.
Setting up a fence if you have small children may
be necessary.
Do not place flammable objects like drying racks,
furniture, curtains too close to the stove.
1.9 Draft conditions
and the chimney
Poor draft will not allow the stove to burn, as it
should. The glass can soot, requires cleaning of
the chimney more often, smoke can escape out
when the door is open and it gives poor fuel ef-
ficiency. Leading to unnecessary polluting of the
environment.
Good draft will allow the stove to achieve op-
timal combustion and the highest possible ef-
ficiency. Heta wood stoves are constructed so
that it itself provides an optimal blend of com-
bustion air. This provides a high efficiency/heat,
clean glass and low environmental impact.
Minimum chimney draft for
Inspire 40-40H: 13 pascal, Inspire 45-45H: 12
pascal and Inspire 55-55H: 12 pascal.
It is the draft that the stove has been tested and
approved on. The minimum draft is necessary
to provide clean burning, beautiful flame pictu-
re, as well as achieving the rated efficiency.
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 for
Inspire 40-45H 263°C, relative to 20°C
Inspire 45-45H 221°C, relative to 20°C
Inspire 55-55H 263°C, relative to 20°C.
Flue gas flow is:
Inspire 40-40H: 3,7 g/sec.
Inspire 45-45H: 4,1 g/sec.
Inspire 55-55H: 5,7 g/sec.
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 tem
perature difference is too small
between smoke gasses and outdoor
temperature, for ex. poorly insulated chimney
• 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:
• Th
e difference in temperature in the chimney
(warmer) and outside temperature (colder)
• It is clear weather
• The chimney has the right height min 4 meters
above the stove, and clear of the roof ridge
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
to burn driftwood, as this may contain a lot of
salt which can damage both the stove and the
