64
10.4 - Coaxial
system: installation
examples
When a coaxial vent and combustion
air system is installed, fi gure 53,
whether vertical or horizontal, it
must be sloped 1/4 in/ft,
(21 mm/m)
towards the boiler.
CAUTION!!! Maintain
the distances given in fi gure 54,
between the vent terminal and the
wall and also between the vent
terminal and the ground level
(snow line).
Maintain 3ft distance also between
the vent terminals of two or
multiple boilers (see fi gure 54).
Figure 53 - Installation examples for
the coaxial pipe
(see section 10.2 for
the reference of the numbers)
Figure 54 - Clearances for the coaxial
vent terminals of two boilers, in a vertical
wall or in a roof
10 - INSTALLATION - Coaxial venting system
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