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nuaire.co.uk
029 2085 8400
Installation and Maintenance
NTD - Nuaire Thermal Ducting
19. 08. 19. Leaflet Number 671780
Flat Ductmaster
Fire Wrap
Flat rigid PVC
within flat Ductmaster
Thermal Ducting
Typical internal
partition wall
Internal flat duct connector
min 100mm either side of
fire damper
Ducting to butt up
against fire collar
Flat Ductmaster
Thermal duct
Thermal duct
Rigid PVC
duct connector
Rigid PVC
duct connector
Condensation trap
Flat Ductmaster
ducting
Typical
cavity
wall
Single
airbrick
PVC
flat
duct
Flat duct
connector
Thermal
duct 90° bend
Rigid PVC
duct
connector
Rigid PVC
duct
connector
Standard
flexible
ducting
Standard
flexible
ducting
Air valve
Air valve
Thermal
duct
plenum
2.3 Flexible Duct Connections Between Air Valves and
Plenums/Bends
2.5 Condensate Trap In Thermal Ducting
2.4 Air Brick Connection Detail
2.6 Fire Wrap in Rectangular Thermal Ducting
2.7 Attenuator in Thermal Ducting
3.0 CUTTING DUCTING
A flush, square 90° cut is required to ensure that an air tight seal is
made with centre ridge in the clamp. If an angled cut is made, this
will not allow the duct clamps to create a seal on the duct. We advise
that the duct is cut with a very sharp blade or fine toothed saw (we
recommend a minimum of 14 teeth per inch). The cutting blade length
should be at least the same length as the wall thickness of the ducting.
Ensure duct is placed into duct clamp connector prior to
installation to check the squareness of the cut ducting.
Nuaire Thermal Ducting is supplied in 1 metre lengths.
If shorter lengths are required the duct can be cut to the
desired length with a fine toothed saw (minimum of 14 teeth
per inch). Failure to make a square cut may result in airflow
leakage when connecting to other ducting pieces. Ensure duct
is placed into the duct clamp connector prior to installation to
check the squareness of the cut ducting (see fig. 9a and 9b).
IMPORTANT
Figure 4. Typical
flexible ducting
between air valve and
plenum/bend.
Figure 5. Typical
rectangular thermal
duct with an air
brick.
Figure 6. Condensate
trap with rigid PVC
duct connectors.
Figure 7. Typical
rectangular thermal
duct with fire wrap.
Figure 9a. A square 90° cut is required to ensure an airtight seal.
NTD-204-CUTTINGAID for 204
x 60mm rectangular duct.
NTD-125-CUTTINGAID for
125mm Ø circular duct.
Figure 9b. Non-square cut resulting in air leakage from duct.
Figure 10. Cutting aids are available from Nuaire.
Flat Ductmaster
Attenuator to be placed inside of 1M
length of Nuaire flat thermal duct
Internal duct
flat connector
Note: Internal black connectors to be removed
from thermal ducting prior to inserting attenuator.
Internal duct
flat connector
Figure 8. Typical
rectangular
thermal duct with
an attenuator.
Square cut edge of duct
length must meet centre
ridge of clamp to ensure
airtight seal.
If an angled cut is made on
the duct then this will not
allow the clamps to make
an airtight seal
