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HWAM Heat Design makes the following minimum requirements on a chimney:
Insulation Height
Brick chimney Core insulation with ‘Isokern’
or similar
4−7 metres above the stove’s exhaust
branch.
Steel chimney At least 50 mm of mineral wool,
from at least 1 metre above the
stove’s exhaust branch
At least 3.5 metres above the stove’s ex-
haust branch, of which at least 3 metres
of insulation.
Regulation damper
HWAM Heat Design AS recommends equipping the chimney or flue duct with a regulation damper
to ensure that the chimney draught can be regulated on very windy days.The regulation damper
should not be able to close the flue duct fully. The chimney must always have a minimum free
flow area of 20 cm2.
Placement of separate components
Before using the stove, please ensure that all separate components are correctly placed (draw-
ing B).
1. The smoke shelf must rest on the vermiculite side panels
2. The cover plate must be placed on top of the small blocks supporting the rear shelf. Pull the
cover plate all the way forward towards the slanted plate with the secondary air outlet
Connecting the chimney A (drawing C)
HWAM Elements is supplied with a top outlet.This may be connected to either an approved steel
chimney or a brick chimney.
1. Steel chimney
2. HWAM fullform pipe. Fits inside the stove’s flue duct socket
3. Brick-built jamb of flue
4. Built-in pipe sleeve. Fits the fullform pipe
5. Wall rosette. Covers wall repairs around the pipe sleeve
6. Joint. Sealed with packing material
7. Regulating damper in fullform pipe
8. Soot door
Chimney
The chimney is the stove’s ‘engine’and crucial for the functioning of the stove.The chimney draught
provides a vacuum inside the stove. This vacuum removes the smoke from the stove, sucks air
through the damper to the so-called window rinse which keeps the window free from soot, and
draws in air for the combustion through the primary and secondary dampers.
The chimney draught is created by the difference between the temperatures inside and outside
the chimney. The higher the temperature inside the chimney, the better the draught. It is therefore
crucial to properly warm up the chimney before closing the dampers and limiting the combustion
in the stove (a brick chimney takes longer to warm up than a steel chimney). On days where the
weather and wind conditions create insufficient draught inside the chimney, it is even more important
to warm up the chimney as quickly as possible.The trick is to quickly get some flames going. Split
the wood into extra fine pieces, use an extra firelighter, etc.
If the stove has not been used for a longer period, it is important to check that the chimney pipe
is not blocked.
It is possible to connect several devices to the same chimney. However, it is important to first