nuaire NTD-125 Ductmaster Thermal Ducting Installation Guide

: June 12, 2024
: Nuaire

Table of Contents

nuaire NTD-125 Ductmaster Thermal Ducting
Product Information
Product Usage Instructions
INTRODUCTION
INSTALLATION
Installation and Maintenance
Fitting Clamps without Fixing Lugs
TYPICAL MVHR DUCT ARRANGEMENT FOR 204 x 60mm
SPARES & SERVICE ENQUIRIES
Range Details 125mm dia. Ducting
References
Read User Manual Online (PDF format)
Download This Manual (PDF format)

nuaire NTD-125 Ductmaster Thermal Ducting

Product Information

Product Name: Nuaire Ductmaster Thermal Ducting (NTD)
Product Description: NTD is a range of ducting and ancillaries designed for installation in domestic properties. It features a unique ducting design that eliminates the need for solid plastic inner ducting to achieve the required thermal properties and leakage rates stipulated by building regulations. The thermal ducting clamps connect system is specifically designed for use with Nuaire Thermal Ducting, allowing quick and easy installation without the need for tapes or sealants.

Features:

Unique ducting design eliminates the need for solid plastic inner ducting
Meets required thermal properties and leakage rates
Quick and easy installation
No need for tapes or sealants

Product Usage Instructions

Installation

Installation must be carried out by competent personnel in accordance with the appropriate authority and conforming to all statutory governing regulations.
The ducting should be installed indoors, on a suitable vibration-free solid surface, away from direct sources of frost, heat, water spray, or moisture generation.
Prior to installation, perform a dimensional check of the chosen installation location to ensure suitability.

Note: Do not place heavy objects on the ducting as this could cause distortion or breakage, resulting in air flow leakage at the seal joint with the connector.

Use of Thermal Ducting Clamps
Thermal ducting clamps with fixing lugs must be used on the duct bends and T pieces as shown in the figures below:

Rectangular Ducting:

Round Ducting:

Use of Flexible Duct Connections with Thermal Plenums and Bends
If using semi-rigid acoustic flexible duct between the MVHR unit and a plenum or bend, ensure that a rigid 125mm dia. PVC duct connector is installed into the plenum or bend for successful connection.
Note: Maximum length of semi-rigid acoustic flexible duct should not exceed 300mm.

Installation of a Condensation Trap in Thermal Ducting
Figure 6 shows the use of a condensate trap (Code Contrap125) with rigid PVC duct connectors (Code PVC593WH).

Installation of an Attenuator in Thermal Ducting
Figure 7 shows the use of an attenuator with rigid PVC duct connectors (Code PVC593WH).
For further assistance, please contact Nuaire at +44 2920 858400 or visit www.nuaire.co.uk.

**NTD-125/204/220-***
NTD 2 piece lugged connector with Ductmaster Rectangular and circular Thermal Ducting Installation and Maintenance Manual

INTRODUCTION

Nuaire Ductmaster 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: 125 mm Ø or 204 x 60 mm and 220 x 90 mm rectangular.
Unlike other thermal ducting systems Nuaire’s unique ducting design negates the need for solid plastic inner ducting to achieve the required thermal properties and leakage rates stipulated by building regulations.
Nuaire’s thermal ducting clamps connect system is designed to use with Nuaire Thermal Ducting and allows quick and easy installation without the need for any tapes or sealants.
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).

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.

IMPORTANT
Do not place heavy objects on the ducting as this could cause distortion or breakage. Distorted ducting could result in air flow leakage at the seal joint with the connector. nuaire-NTD-125-Ductmaster-Thermal-
Ducting-02

IMPORTANT
Nuaire Thermal Ducting is supplied in 1 meter lengths. If shorter lengths are required the duct can be cut to the desired length (see section 4.0)

Thermal Ducting Clamps
Nuaire thermal ducting clamps are available in 2 options to match 125 mm Ø or 204 x 60 mm or 220 x 90 mm rectangular duct. All types are with or without fixing lugs.
nuaire-NTD-125-Ductmaster-Thermal-Ducting-01 IMPORTANT
Thermal ducting clamps with and without fixing lugs must be used on the duct bends and T pieces as shown below.

Installation and Maintenance

Use of Flexible Duct Connections with Thermal Plenums and Bends
Where it is necessary to use semi-rigid acoustic flexible duct (max length 300mm) between the MVHR unit and a plenum or bend please ensure that a rigid 125mm dia. PVC duct connector is installed into the plenum or bend for successful connection.
Use of Flexible Duct Connections Between Air Valves and Plenums / Bends
Installation of a Condensation Trap in Thermal Ducting
Installation of an Attenuator in Thermal Ducting
4.0 Cutting Ducting Lengths
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.

IMPORTANT
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. (We recommend a minimum of 14 teeth per inch). Failure to make a square cut may result in air flow leakage when connecting to other ducting pieces. Ensure duct is placed into Duct Clamp connector prior to ins tallion to check the squareness of the cut ducting (figs. 9 and 10).

Fitting Clamps with Fixing Lugs

IMPORTANT
Only clamps with fixing lugs (NTD-204-CONL) and (NTD-125-CONL) should be used for fitting / securing duct to the installation surface.

Establish the installation position for the ducting and clamps with lugs and drill 2 holes to suit the clamp position.

Having drilled 2 fixing holes to suit the clamp position, remove the top half of the clamp from the bottom half. Using appropriate fixings fix the top half of the clamp to the solid surface (fixings supplied by others).
Having drilled 2 fixing holes to suit the clamp position, remove the top half of the clamp from the bottom half. Using appropriate fixings fix the top half of the clamp to the solid surface (fixings supplied by others).

For final installation into the clamp, push the duct up into the duct clamp fixed to the solid surface. The centre joint of the 2 duct lengths should be located on the centre ridge of the clamp. Take the bottom half of the clamp and push up so that the fixing tabs on each side fit into the slots on the female half, then press together. Ensure the ducting is fully pressed into the clamp to create an air tight seal. Failing to do so may cause air leakage.
nuaire-NTD-125-Ductmaster-Thermal-Ducting-16

Fitting Clamps without Fixing Lugs

The clamps without fixing lugs (NTD-204-CON or NTD-220-CON) and (NTD-125-CON) should only be used to connect two ducting items together; they should not be used for installing duct to any surface.
Straight runs of Nuaire white plastic ducting should be supported by either clip type PVC122-5WH or PVC coated steel banding every 1.0m (maximum).
Straight runs of Nuaire Thermal Duct should be supported every 1.0m (maximum) if using PVC coated steel banding or when using Clamps with Mounting Lugs (Types NTD-204-CONL, NTD-125-CONL, NTD-220-CONL).
With both thermal ducting or rigid ducting systems, care should be taken to ensure that bends, T-pieces, transitions, and plenum sections are also adequately supported by at least one lugged clamp/PVC clip/banding support, as applicable.
When banding is used, ductwork support locations should ideally be at the midpoint between clamps.

nuaire-NTD-125-Ductmaster-Thermal-Ducting-19

TYPICAL MVHR DUCT ARRANGEMENT FOR 204 x 60mm

nuaire-NTD-125-Ductmaster-Thermal-Ducting-20

SPARES & SERVICE ENQUIRIES

Spare parts and replacement components are available from Nuaire. Please contact us for further details.
Our Technical Support department will be happy to provide any assistance required, initially by telephone and if necessary, will arrange for an engineer to call.
Telephone 029 2085 8400 technicalsupport@nuaire.co.uk