RRU
The units are equipped with high efficiency rotating heat recovery reaching  efficiency values as high as 85%, with the advantages to obtain low pressure loss and  very small dimensions also for unit with big flow rate .
The high recovered heat allows reducing considerable the normal use of heating/cooling, with obvious economic advantages .
The series is available in 7 different models, with nominal air capacity ranging from 1500 to 15000 m³/h.

Casing
The frame is manufactured from UNI
9006/1 – ASTM 6060 Anticorodal Alu-
minium with “non slip” surface profiling
and are connected with corner pieces in
fibreglass reinforced nylon. Panels are
constructed with a sandwich structure
in zinc plated pre-painted steel; the insu-
lation is made from a filling of expanded
high density polyurethane foam (approx.
40 kg/m³) – Class of reaction to fire 1 –
UNI 9177.
The internal panel surface is manufac-
tured with a special shaping, which in
coupling with the profile creates a single
flush surface , improving the air-handling
efficiency characteristics and making
cleaning and maintenance operations
far easier and safer.
Inspection doors supplied with handles
allow easy access to all unit components.

Heat recovery unit
The rotary heat recovery units are of the
air-to-air type consisting of a cylindrical
rotor containing thousands of channels
and with an extremely large surface, a
casing (complete with brush gaskets to
minimize leakage between the supply
and exhaust air-flows) and a drive system
powered by an electric motor.
The rotor is constructed with alternating
flat and corrugated aluminium sheets,
due to its heat exchange characteristics,
corrosion resistance, non-inflammability,
and duration.
The casing is made of galvanised steel
sheeting.
The electric three-phase 400/3/50 mo-
tor, which drives the heat exchanger is
designed in accordance with the size of
the rotor. All motors are provided with
heat protection Energy recovery of up to
75% of efficiency.

Electric fans
The ventilating sections are equipped
with single aspiration centrifugal fans of
the plug-fan type with directly-coupled
EC motor. The electronic motor ensures
optimum flow rate regulation, high effi-
ciency and limited noise emissions. The
fans comply with ERP 2015 efficiency
targets.

Filters
There are 2 filters in the supply section:
the first one is an undulating filter in
class G3 – EN 779, coupled with a bag
filter in classF7 – EN 779. The return air
filter is an undulating filter in class G4 –
EN 779 (class F5 on request). All filters
can be extracted from the side.