11
Duct system
It is recommended that the duct system should be made of
spiral-folded pipes assembled with fittings with rubber ring
seals so that you get a tight and durable duct system. In
order to achieve a satisfactory noise level from the unit,
sound locks must be installed on the supply air and exhaust
air duct system between the unit and the first supply air
and exhaust air vents.
To eliminate noise from the supply and exhaust air vents, it
is recommended that the air velocities in the ducts are
reduced to a sufficiently low level.
When positioning outdoor air and exhaust air hoods/
gratings, it must be ensured that the two air flows do not
short-circuit, thereby preventing the exhaust air from being
sucked in again. It is recommended that bar screens are
installed on the northern or eastern side of the house to
achieve optimal comfort in houses/apartments.
It is recommended that the air intake should be located on
the north or east side of the house to achieve maximum
comfort and minimal impact from the sun’s heat.
The recommended minimum horizontal distance between
air intake and exhaust air: 3 metres.
The recommended minimum vertical distance between air
intake and exhaust air: 1 metre.
To connect ordinary galvanised steel ducts to the ECO 275
ventilation unit, you must first install 4 nipple connectors in
the unit’s Ø160 mm openings (double sealing lips). Alterna-
tively, Ø200 mm galvanised steel ducts should be placed
over the EPP connectors.
The unit is now ready for direct connection of ductwork to
the nipple connector. It is recommended to install galva-
nised angle brackets to fasten the nipple connector to the
galvanised housing using self-tapping steel screws.
3 m
1 m
3 m
Kanalisolering, alt. A
Kanalisolering, alt. B
Forkert isolering
Ductwork insulation alt B
Ductwork insulation alt A
Wrong insulation
