3 m
1 m
3 m
8
Duct system
It is recommended that the duct system should be from
spiral ducting assembled with fittings with rubber ring
seals to ensure a tight and durable duct system. To achieve
a satisfactorily low noise level from the unit, sound locks
must always be fitted to the supply air and exhaust air
duct system between the unit and the first supply air and
exhaust air fittings.
It is recommended dimensioning the air speeds in the ducts
at a sufficiently low level so that no noise is generated by
supply air and exhaust air fittings.
When positioning outdoor air and exhaust hoods/grates,
ensure that the two air currents do not short-circuit,
thereby preventing the exhaust air from being sucked in
again. It is recommended that grates should be placed
on the north or east side of the house to achieve optimal
comfort in homes/flats.
It is recommended that the air intake should be placed on
the north or east side of the house to achieve maximum
comfort and minimal impact from the sun’s heat.
Recommended minimum horizontal distance between air
intake and exhaust: 3 metres.
Recommended minimum vertical distance between air
intake and exhaust: 1 metre.
To connect ordinary galvanised steel ducts to the ECO 375
ventilation unit, you must first install 4 nipple connectors in
the unit’s Ø160 mm openings (double sealing lips). The unit
is now ready for direct connection of ductwork to the nipple
connector.
Insulation of ducts in cold attics
To benefit from the unit’s high recovery potential
(efficiency), the ducts must be correctly insulated.
Supply air and exhaust air ducts
In order to minimise heat loss from the duct system in cold
attics, supply air and exhaust air ducts must be provided
with at least 100 mm of insulation. If insulation from
alternative A is used, it is recommended executing with two
layers of 50 mm lamella mats with paper or foil externally
and with staggered joints between the two layers. If
the ducts are laid on the main beams of truss frames,
alternative B can be used. The insulation must always be
packed tightly around the ducts.
Kanalisolering, alt. A
Kanalisolering, alt. B
Forkert isolering
