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6.3 Chimney and flue pipes
We guarantee the proper functioning of the appliance if the chimney draught is between 8 and 20 Pa. If the chimney
draught is too high, then a damper must be incorporated.
If there isn't enough chimney draught, then the following measures can be considered:
Extending the chimney
Improving the insulation of the chimney (less cooling of the flue gases)
Increasing the supply of combustion air into the space in which the appliance is installed.
Improving the airtightness of the chimney
Many problems with inset fires are caused by badly working chimneys. Therefore some suggestions:
A round channel is preferred (minimum friction)
The diameter of the chimney may not be smaller at any point than that of the appliance
The mouth of the chimney should be unobstructed
The chimney should be as close as possible to vertical with as few curves as possible.
The chimney must not draw in extra air. Watch out for flue dampers and cleaning hatches in the cellar or on the
roof!
The chimney may not have too many connections - that reduces the upwards pressure. Consult your chimney
specialist!
Flue connections to different stoves and fireplaces may not be located opposite each other at the same height, in
order to prevent the chance that combustion gases will not be drawn out. Two flue connections must be at
separated vertically by at least 30 cm.
For the chimney opening, you will need to comply with your national legislation.
For details on chimneys we refer you to the relevant regulations with which the chimney needs to comply.
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