NuAire NTD-125 Series Installation Manual

NTD-125-*, NTD-204-* & NTD-220-*
Nuaire Round & Rectangular Thermal Ducting
Installation Guide
1.0 INTRODUCTION
Nuaire Thermal Ducting (NTD) is a range of ducting and ancillaries
intended for installation in domestic properties.
Nuaire Thermal Ducting is available in three different sizes and
profiles, based on the internal dimension: 125mm diameter or 204
x 60mm and 220 x 90mm rectangular.
Using Nuaire Thermal Ducting will achieve a level of leakage
substantially lower than the maximum allowed for a class A duct as
defined in DW/143 (Ductwork leakage testing).
2.0 INSTALLATION
Installation must be carried out by competent personnel in
accordance with the appropriate authority and conforming to all
statutory governing regulations.
The ducting must be installed indoors, on a suitable vibration-free solid
surface away from direct sources of frost, heat, and water spray or
moisture generation.
Prior to installation a dimensional check of the chosen installation
location should be undertaken to ensure suitability.
2.1 Thermal Ducting One Piece Connector & Duct Clamps
Nuaire Thermal Ducting clamps are available to match 125mm
diameter or 204 x 60mm or 220 x 90mm rectangular duct.
IMPORTANT
Do not place heavy objects on the ducting as this could cause
distortion or breakage. Distorted ducting could result in airflow
leakage at the seal joint with the connector.
Figure 1. Rectangular ducting.
nuaire.co.uk 029 2085 8400
Figure 2. Round & rectangular thermal ducting clamps.
NTD-125-OPC
NTD-204-OPC
2.2 Flexible Duct Connections with Thermal Plenums &
Bends
Where it is necessary to use semi-rigid acoustic flexible duct between
the MVHR unit and a plenum or bend please ensure that a rigid 125mm
diameter. PVC duct connector is installed into the plenum or bend for
successful connection.
Figure 3. Typical semi rigid acoustic flexible duct connection with
thermal plenum / bend.
Rigid PVC
Thermal duct
duct connector
plenum
Semi-rigid
acoustic
flexible
ducting
MVHR unit
19. 08. 19. Leaflet Number 671780
NTD-220-OPC
Thermal
duct 90° bend
Rigid PVC
duct
connector
Semi-rigid
acoustic
flexible
ducting
1