Chappee initia MASTER 2.24 FF Installers And Users Instructions page 9

... separated flue-air ducting
This type of ducting allows to disengage exhaust flue gases both outside the building
and into single flue ducts.
Comburant air may be drawn in at a different site from where the flue terminal is lo-
cated.
The splitting kit consists of a flue duct adaptor (100/80) and of an air duct adaptor.
For the air duct adaptor fit the screws and seals previously removed from the cap.
The restrictor must be removed in case you install separated flue and air duct termi-
nals.
The 90° bend allows to connect the boiler to flue-air ducting regardless of direction as it
can be rotated by 360°. It can moreover be used as a supplementary bend to be coupled
with the duct or with a 45° bend.
A 90° bend reduces the total duct length by 0.5 metre.
A 45° bend reduces the total duct length by 0.25 metre.
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