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6.4 AIR DUCT STATIC LOSS
6.3 EXHAUST AIR
FIG. 6.3A TYPICAL DUCTING EXAMPLES
No Duct
No Air In Duct
Ducted Exhaust
either side or top
For details of ducting kits
available, consult Ariston.
The exhaust air for the Nuos is extracted through a round vent either from
the right hand side or top of the unit, this can be terminated internally or be
ducted externally. When terminating the exhaust internally it must be
remembered that the air exiting the Nuos will be chilled, the effects of this
chilling must be considered. The room volume must have a minimum
volume of 20m³.
When terminating the exhaust duct to the outside, a termination grille must
be installed, but NOT an insect grille.
To prevent any ingress of driving rain the final extension duct must be
inclined 1º falling away from the appliance. The remaining duct can be
installed horizontally or vertically. The ducting must be adequately
supported, a bracket for each extension is recommended.
When terminating the exhaust air to the outside and drawing air from an
internal space, an air vent having a minimum free air space of 4000mm² is
required to the space where the air is being drawn.
Each duct accessory has a designated static loss value (measured in
Pascal (Pa). The combined total of static losses for both exhaust and
supply air ducts where applicable must not exceed 70Pa.
See table below for static losses for accessories.
Air In Duct &
Ducted Exhaust
either side or top
See examples section 1.8 &
1.14.
*Important
When both inlet and outlet
ducts are used these must
terminate at least 500mm
apart.
Under certain climatic
conditions condensation
may form on the outside of
the air/exhaust ducts. To
prevent this the ducting
must be insulated.
*see note
Smooth 90º PVC
Bend
Smooth PVC
Duct
GRILLE
5 Pa/metre
2
Component
Ø150
Flexible Duct
Straight
Flexible Duct
90ºC
Static Loss (Pa)
M Equivalent 1
15 Pa
3
9.5 Pa/metre
1.9
7 Pa
1.4
10 Pa
1.5 Pa/metre
5.3
Ø200
Static Loss (Pa)
M Equivalent 1
4.5 Pa
3
2.8 Pa/metre
1.9
2.5 Pa
1.7
8 Pa
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