Airwell AIRFLOW2020, Installation & Operation Manual, Page: 92 / 140

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5 - AERAULIC CONNECTIONS
AIR DISTRIBUTION / EXHAUST SYSTEM
AERAULIC DESIGN CRITERIA
Make sure you have the final plan of the ELFOAir aeraulic
system.
The dimensioning and the correct execution of the
aeraulic connections are critical to ensure the unit
operating and an appropriate level of quietness in the
served area.
Here are some indications, as a simple checklist to
support the installer and the designer of the installation.
•
AIR RENEWALS = 0,5 volumes per hour , max 1
volume per hour ; in the volume are not considered
the extraction rooms (kitchens, bathrooms, etc.)
• AIR SPEED included between 2 and 3 m/sec (it
guarantees the system silence)
• RETURN AIR in the kitchens / bathrooms / rooms
with vapours, unpleasant odours
• SUPPLY AIR in the living room , bedrooms ,
studies etc....
If the duct outlets for the outdoor air inlet and exhaust
are outside of coverage, must end with a 90 ° bend
downward, to prevent entry of water from the air inlet, if
they are outside the roof, they must end with roof
hoods (not provided by
Airwell
), so as to prevent water
from entering. During the design stage, their features
must limit load losses so as not to affect the correct
operation of the unit.
To perform the ductings:
•
Connect the ductings fixing them to the connections
with the special hookings to the circular flanges.
•
The duct weight should not lie on the connection
flanges.
•
Put antivibration joints between ducts and units.
• The connection to the flanges and among the
different duct sections must guarantee the air seal,
avoiding air dispersions in supply and return that
penalize the overall efficiency of the installation.
• Limit the pressure drops by optimizing the path, the
type and the number of curves and branches.
• Use curves of large radius.
•
Thermically insulate the supply ducts to avoid heat
losses and condensate.
Do not cover the nozzles/grilles with objects (furniture,
wardrobes, etc.), which would prevent the regular
circulation of air in the room.
* Ensure sufficient space for the conduit accessories
Plasterboard
Access trap door
SIZE CONNECTIONS
A
Air exhaust Ø 200 mm
B Ambient air return Ø 200 mm
C Ambient air distribution Ø 200 mm
D
Fresh air intake Ø 200 mm
A
D
B
C
CONNECTION ROTATION
The 4 connections can rotate 360 °