13
9.1 METAL+SPONGE PRE-FILTER
This filter is made of a stratified pressed aluminium mesh
filter, combined with a high quality sponge and a galvanised
sheet frame.
The frame consists of 2 shells that can be opened and re-
used to wash the filter components.
The sponge air filters are made in standard dimensions ac-
cording to EN standards compliant with ASHRAE standards
to fit perfectly inside the air treatment unit. The most suit-
able application fields for these kinds of filters are in sectors
with high quantities of oils and greases, such as particular
types of industrial applications and in commercial kitchen
units.
9.2 FEL ELECTROSTATIC FILTER
FEL filters are particularly suitable for the abatement of pol-
lutants such as oil mists and vapours with and without par-
ticulate, produced during cooking phases.
The main special feature of this filter is observed in the
lower part of the collector blades, where the specially-
designed shape allows high
amounts of oily pollutant to drip, with the reduced formation
of electric discharges between the plates. In addition, the
special mechanical construction guarantees that no electri-
cal discharges occur on the insulators, even in the presence
of water vapour, ensuring high reliability over time.
The open lower part allows what is condensed during filtra-
tion to collect on specially prepared tanks. The high separa-
tion capacity along with a high particulate retention capac-
ity, achieves compact abatement systems with
low pressure losses, almost constant over time and with
high efficiency.