Hiflex
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11.9 - Fresh air
The fresh air kit, with its own filter G3, installed on the fan suction side, has a connection with a plastic pipe
with 100 mm diameter. The connection is placed in the lower part of the unit for an easier and quicker instal
lation.
As it is positioned on the fan suction, the fresh air will easily mix with the recirculated air.
Models Clean (dirty) filter fresh air ** (l/s)
4S/M/P U 28 (24) 22 (20)
4L/G U 29 (25) 22 (20)
6S/P U 26 (23) 20 (19)
6L/G U 28 (24) 21 (20)
8S/P U 29 (25) 22 (21)
8L/G U 32 (28) 24 (22)
4S/M/P O/C 22 (20) 17 (15)
4L/G O/C 23 (21) 18 (17)
6S/P O/C 24 (21) 18 (17)
6L/G O 25 (22) 19 (18)
8S/P O/C 26 (23) 20 (19)
8L/G O 28 (24) 21 (20)
5S/M/P U 56 (48) 44 (20)
5L/G U 58 (50) 22 (20)
7S/P U 52 (46) 20 (38)
7L/G U 56 (48) 42 (40)
9S/P U 58 (50) 44 (42)
9L/G U 64 (56) 48 (44)
5S/M/P O 44 (40) 34 (30)
5L/G O 46 (42) 36 (34)
7S/P O 48 (42) 36 (34)
7L/G O 50 (44) 38 (36)
9S/P O 52 (46) 40 (38)
9L/G O 56 (48) 42 (40)
Suction pipe equivalent length* (m) 12 24
* A 90 bend corresponds to approx. 2 m linear duct.
** Suction pipe diameter 00mm
11.10 -Suction and delivery ducts
Hiflex can be provided with suction and delivery ducts on the top in order
to be connected to a false ceiling. The air duct is made so as to keep the
same appearance of the machine; the height (min. 600, max. 1200 mm)
can be defined when the machine is ordered.
The duct is lined with deadening material to reduce the sound emission
through the outlet air opening.
The maximum sound reduction, which can be obtained with
1200-mm-high ducts, is -5.5 dB(A) at 2 m in front of the machine
(instrument positioned at 1.5 m from the floor) and - 0.5 dB(A) at 1 m
and at 45 with respect to the horizontal delivery plane of the machine,
with free opening (not ducted).
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