The Airvent PVC Flexible Ducting Hose 100mm × 3m (401897) is a lightweight, ultra-flexible ventilation duct designed for domestic and light commercial use with standard 100mm round duct systems. Manufactured from DEHP-free PVC film reinforced with a steel helix winding, it resists distortion when bent around tight corners — ideal for connecting extractor fans, cooker hoods, and bathroom fans to external wall outlets where rigid duct is impractical. Fully compliant with Approved Document Part F, this hose keeps installations code-compliant while offering fast, tool-free fitting.
100mm
Duct diameter
3m
Extended length
60°C
Max operating temp
75μm
PVC film thickness
DEHP-free
Plasticiser type
Part F Compliant: This ducting is Approved Document Part F compliant, confirming it is suitable for domestic ventilation systems in England, Wales and Scotland. The DEHP-free plasticiser and absence of heavy metal stabilisers also make it a safer choice for indoor air quality.
Installation Tip: For best airflow efficiency, install the hose as straight and taut as possible. Each unnecessary bend adds resistance. Where bends are unavoidable, keep the bend radius as large as the space allows. Secure to fan spigots and grille connections with jubilee clips or cable ties.
Steel Helix Reinforcement
The steel winding at 35mm pitch maintains the circular cross-section under compression and bending. This prevents the hose from collapsing in tight bends — a common failure mode with cheaper PVC-only duct — keeping airflow consistent along the full run.
DEHP-Free PVC Film
Formulated with a monomeric DEHP-free plasticiser and no heavy metal stabilisers, this ducting avoids the indoor air quality concerns associated with older PVC compounds. Suitable for installations in occupied rooms and for ventilating kitchens and utility spaces.
Universal 100mm Fit
Compatible with all standard 100mm (4") round duct fittings, including extractor fan spigots, wall grilles, gravity flaps, and inline connectors. Push-fit connection makes installation fast — secure with a jubilee clip or tie wrap for a vibration-free seal.
3-Metre Working Length
The full 3-metre extended length provides adequate run for most domestic wall-to-fan connections, including angled runs and those that navigate around obstacles. The hose can be trimmed to length with scissors or a craft knife without specialist tooling.
Technical Specifications
| MPN |
401897 |
| Brand |
Airvent |
| Duct Diameter |
100mm (4") |
| Extended Length |
3000mm (3m) |
| Film Material |
Polyvinyl Chloride (PVC) |
| Film Thickness |
75μm |
| Winding Material |
Steel |
| Winding Pitch |
35mm |
| Plasticiser Type |
Monomeric (DEHP free) |
| Stabilisation System |
Without heavy metals |
| Colour |
White (RAL 1425) |
| Maximum Operating Temperature |
60°C |
| Application |
Domestic & light commercial ventilation |
| Compliance |
Approved Document Part F |
Frequently Asked Questions
How do I connect PVC flex ducting to a fan or grille?
Push the end of the hose over the spigot of the fan or fitting — the hose's inner diameter is a close fit to standard 100mm spigots. Secure with a jubilee clip tightened around the hose over the spigot, or use a strong cable tie. For a more airtight seal, wrap the joint with aluminium foil duct tape before tightening the clip.
Can I use PVC flex ducting for a kitchen cooker hood?
PVC flexible ducting with a 60°C maximum operating temperature is not recommended for direct connection to a cooker hood exhaust, as cooking vapour temperatures can exceed this limit. For cooker hood applications, use aluminium flexible ducting (such as the Manrose 1010), which handles higher temperatures safely. PVC flex is well suited for bathroom, utility room, and WC fan connections where temperatures remain ambient.
Is PVC ducting compliant with Building Regulations Part F?
Yes. Airvent 401897 is specifically declared compliant with Approved Document Part F. The use of DEHP-free plasticisers and heavy-metal-free stabilisation also aligns with best practice for indoor air quality. Ensure the duct run is as short and straight as possible to maintain the fan's rated airflow performance.
Can the hose be cut to a shorter length?
Yes. The hose can be cut cleanly with sharp scissors or a craft knife. Cut between the steel winding coils (rather than through a coil) to avoid a jagged edge and to maintain the circular cross-section at the cut end. The cut end can be connected to a fitting in the same way as a full-length end.
