Structure:
single paneling version: made of hot-galvanized sheet Z200 1 mm and 1.5 mm thick (sizes 6-7) insulated with thermo-acoustic mattress class B-s2, d0 with closed cells, 6 mm thick.
double paneling version: made of Z200 hot galvanized sheet 1 mm and 1.5 mm thick (sizes 6-7) pre-painted white RAL9010 externally and internally galvanized, sandwich type panels 15 mm thick with mineral wool thermal and acoustic insulation density 35 kg/m3.

Auxiliary drain pan:
made of hot galvanized sheet Z200, 1 mm thick, externally insulated with closed cell thermoacoustic mattress class B-s2, d0, 6 mm thick.

Air filter: 
always supplied as standard and integrated in the unit, easily removable from the side or from the bottom, regenerable and made of synthetic filter fabric enclosed by a galvanized steel frame and efficiency class G3 * / EU3 **, 12 mm thick.
Alternatively, a wide range of filters with higher efficiencies are available including G3 * / EU3 ** 25 mm, G4 * / EU4 ** 48 mm or filter with aluminum mesh G1 * / EU1 ** 12 mm. Also available is the innovative electronic filter that allows complete air purification and at the same time ensures high efficiency thanks to minimal pressure drops. 
(* according to EN779 / ** according to Eurovent)

Fan group:
double-inlet centrifugal fans with statically and dynamically balanced horizontally-oriented aluminium impellers. Single-phase asynchronous electric motor with overload cutout. Multi-speed motor (3 of which are connected). The motor is directly coupled to the fans and cushioned with flexible mountings to ensure low noise.
The FRESH-ECM series is instead equipped with innovative Brushless ECM motors that guarantee precise and modular control of the air flow, limiting the energy supply to the actual workload required, without unnecessary waste.

Coils: 
coils are made of copper pipe expanded into aluminium fins. Copper headers with male fittings (GAS threads) and easily accessible air vents. The water connections are located on the left (looking at the air outlet). On request, the water connections can be placed on the right side of the unit. The heat exchanger coil is not suitable for use in corrosive atmospheres.

Electronic Filter "Pure Life System"
Pure Life System consists of a two-stage filtration module that can be integrated directly into the FRESH series, the fact that the solid particles contained in the air flow are precipitated by the action of an electric field  that retains the polluting particles and microorganisms dispersed in the air, such as bacteria, viruses and spores conveyed by such particles. 
Through a potential difference generated between the emission and collection electrodes, the pollutants are precipitated, captured and retained by special collection grilles, obtaining healthy and completely purified air.