5 Air filtration
For hygiene reasons, Hoval recommends always fitting
TopVent
®
gas units with a filter.
5.1 Filter box
A filter box with 2 bag filters can be installed for the purpose
of filtering the recirculation air. The modular construction
made of Aluzinc sheet metal with 2 sliding doors makes it
easy to replace the filters.
Notice
In the planning phase make sure there is enough
space in front of the sliding doors so that the filters
can be replaced with ease.
A pressure difference control device is installed for automatic
monitoring of the filter. It shows when the filters have to be
cleaned or changed.
Size
6
9
A
mm
900
1100
B
mm
400
400
Filter class
ISO coarse 60 % (G4)
Weight
kg
20
24
Factory setting of differential pressure
switches
Pa
180
180
Table F7: Filter box technical data
5.2 Flat filter box
A flat filter box with 4 pleated cell filters can be installed for
the purpose of filtering the recirculation air.
A pressure difference control device is installed for automatic
monitoring of the filter. It shows when the filters have to be
cleaned or changed.
A
B
Size
6
9
A
mm
900
1100
B
mm
140
165
Filter class
ISO coarse 60 % (G4)
Weight
kg
10
12.5
Factory setting of differential pressure
switches
Pa
50
50
Table F8:
Flat filter box technical data
6 Acoustic cowl
The acoustic cowl reduces the noise level in the room; it is
installed in the Air-Injector. This does not change the outside
dimensions of the Air-Injector.
Insertion attenuation is 4 dB compared with the total sound
power level of each TopVent
®
unit.
F
65
Options
Air filtration
Paint finish
