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Determine on the base of the table 2 and 3, depending on the type and
terminal position, if the desired situation is possible. To establish this you
will need to calculate:
• The effective height (this is the real difference in height between the
upper side of the appliance and the terminal).
• The total horizontal flue length, where:
à each elbow, which is in the horizontal area, counts for 2 meters.
à each 45°-bend, which is in the horizontal area, counts for 1 m
à elbows and bends at the transition of horizontal to vertically are
not to be counted.
à the wall mounted terminal counts for 1 meter.
Flue restrictor
If applicable, in the table is also stated the size of a flue restrictor. This
restrictor needs to be fitted in the combustion chamber when placing the
appliance (see chapter 4.2). Normally the smallest flue restrictor is fitted.
Example calculation 1:
Calculating horizontal extension fig. 2a:
Flue lenght C + E = 1m + 1m 2 m
Elbows D = 2m 2 m
Total horizontal extension 4 m
Measure or calculate effective height
(Hvert)
Flue lenght A 1 m
Roof mounted terinal 1 m
Total effective height 2 m
When calculating on basis of the
Widescreen table nr. 2: It is allowed.
Remove the flue restrictor!
When calculating on basis of the MV100
table nr. 3: Allowed but without flue
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