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Ventilation installation
Duct system
Legislation
Ducts
There are two systems you can use to lead air through the dwelling.
Spiral ducts
Spiral ducts are made from metal and are cut to size using an angle grinder. They are then connected using ducting bends and mani
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folds and are fitted in accordance with the blueprint. The ducts are typically placed on the tie beams where they are fixed with perfo
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rated band, or they are suspended using suspension band. Avoid unnecessary bending of the ducts.
To prevent sound transmission from room to room, you should install a silencer for each room.
The ducts must be insulated to prevent heat loss and condensation. In some cases this can be avoided if the ducts are run through the
standard insulation or inside the climate screen.
NilAIR tubes
NilAIR tubes constitute a flexible system that is easy to install. You can easily cut the tubes to size with a Stanley knife and then situate
them in accordance with the blueprint without having to use bends and manifolds. You install a manifold box after the unit and run the
tubes from the box out to the individual rooms.
When using NilAIR tubes, you do not have to install silencers for each room. The sound-damping effect of the tubes ensures that
sounds and noise will not be transmitted from room to room.
If you install the tubes outside the climate screen, you must insulate them to avoid heat loss and condensation. This is simpler than
using spiral ducts as NilAIR tubes are easily led through the standard insulation.
NilAIR tubes are more flexible than spiral ducts and you can therefore run the tubes in places that are unsuitable for ordinary spiral
ducts.
Ventilation unit
Nilan recommends installation of flexible connections between the ventilation unit and the duct system.
This is to avoid vibrations from the unit being transmitted to the duct system. It will also make it easier to move the unit, which may be
necessary during future services of the unit.
Nilan can supply Soundflex tubes that you can use as flexible connections between the ventilation unit and the duct system. They will
also reduce sounds from the system considerably.
The Soundflex tubes are insulated against condensation. It may, however, be necessary with further insulation in order to comply with
local requirements with regards to insulation of duct systems.
ATTENTION
All work must be carried out by qualified persons and in compliance with existing legislation and regulations.