125mm - Thermal 2m Duct

2026-04-16T09:23:55+01:00

Price: 45.01

Product Part Number

SST-125-2M

Product Overview

The Verplas SST-125-2M-IND Rapid Self-Seal Thermal Duct is a high-performance, pre-insulated ventilation duct designed for fast, secure installation in modern ventilation systems. With a 125mm diameter and 2m length, it provides an efficient solution for both supply and extract air applications, particularly in MVHR and MEV systems.

Manufactured from graphite-impregnated expanded polystyrene (EPS), the duct delivers excellent thermal insulation to minimise heat loss and reduce the risk of condensation. Its patented push-fit “click and lock” sealing system ensures a low-leakage connection that exceeds industry standards, significantly improving system efficiency and installation speed.

Supplied with an integrated duct-to-duct connector, the SST-125-2M-IND allows seamless extension between duct lengths, while the open end enables direct connection to 125mm fan spigots or fittings. Lightweight yet durable, this ducting system is engineered for ease of handling without compromising on performance or compliance.

Technical Specification

Product Name: Verplas Rapid Self-Seal Thermal Duct
Part Number: SST-125-2M-IND
Manufacturer: Verplas Ltd

Dimensions & Physical Properties

Diameter: 125mm

Length: 2000mm (2m)

Free Area: 12,273 mm²

Individual Weight: 341g

Colour: Grey

Box Quantity: 6 units

Material & Construction

Duct Material: Graphite impregnated Expanded Polystyrene (EPS)

EPS Density: 25 kg/m³

Connector Material: High Impact Polystyrene

Connection Type: Push-fit, click and lock self-sealing system

Included Fitting: 1 × Duct-to-Duct connector

Thermal Performance

Thermal Conductivity: 0.03 W/mK

Thermal Resistance: 0.666 m²K/W

Compliance: BASF EN13163

Temperature Range

Minimum Operating Temperature: -15°C

Maximum Operating Temperature: +60°C

Fire & Safety

Fire Rating: DIN 4102-B1 (Flame Retardant)

Air Leakage & Standards

Exceeds DW/143 Class A air leakage requirements

Complies with DW/154 ductwork standards

System Compatibility

Suitable for:

MVHR (Mechanical Ventilation with Heat Recovery) systems

MEV (Mechanical Extract Ventilation) systems

Approved for use within SAP energy performance calculations

Airflow Resistance Performance

Airflow (L/s) | Pressure Loss (Pa)
8 | 0.20
13 | 0.40
21 | 0.90
30 | 1.70
60 | 6.00
120 | 23.30

Installation Features

Pre-insulated for reduced installation time

Push-fit connection to 125mm fan spigots

Compatible with Verplas self-seal fittings and bends

Can be cut to required length

Integrated female coupling for secure fitting connections