Baxi Slim 1.230 FiN User's And Installer's Manual page 12

The minimum slope of these ducts towards the outside must be 1 cm
per metre in length.
MINIMUM SLOPE 1 cm per metre (down towards
the outside to drain off condensation)
Adding a 90° bend shortens the total length by 1 metre.
Adding a 45° bend shortens the total length by 0.5 metres.
view from above
view from above
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examples of installation with horizontal ducts
L max = 4 m
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(L +L ) max = 3 m
1 2
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view from
above
(L +L
1
(L +L
1
12
) max = 3 m
2
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view from above
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+L ) max = 3 m
2 3
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