32
Vertical Flue Set
(SRD 20/27)
Vertical concentric
fl
ue kit Ø60/100 polypropylene inner pipe.
Discharges exhaust fumes and draws air directly from high Level.
Suitable for
condensing boilers
only.
Discharges exhaust gases and draws com-
bustion air at roof level by means of two
concentric ducts. The external Ø100 duct
draws the combustion air while the Ø60
plastic inner duct discharges the exhaust
fumes.
MAXIMUM FLUE LENGTH:
6 m (SRD 20)
5 m (SRD 27),
The
maximum
fl
ue length (linear equiva-
lent) is obtained by summing the length of
linear pipe and the equivalent lengths of
each bend
fi
tted.
The
linear equivalent
is intended as being
the total length of the duct from the con-
nection with the combustion chamber of the
appliance, excluding the
fi
rst bend.
The linear equivalent of additional bends
is as follows:
Ø60/100 x 90° = 0.8 m.
Ø60/100 x 45° = 0.5 m.
N.B.:
USE ONLY ALARKO TYPE-AP-
PROVED FLUE SYSTEMS FOR DIS-
CHARGING EXHAUST GASES AND
DRAWING COMBUSTION AIR.