What is COMBI ducting?
COMBI ducting is flexible ventilation ducting with a reinforced outer construction, providing a practical and robust way to connect ventilation equipment while retaining the flexibility needed for installation.
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102mm (4”) x 5m COMBI Ducting - Reinforced Flexible Ventilation Duct
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345
£3.45
Unit price perEstimated delivery between November 01 and November 03.
102mm (4") x 5m COMBI Ducting is a flexible reinforced ventilation duct designed for reliable air movement in extraction and intake systems.
COMBI ducting combines the flexibility required for straightforward installation with a more robust outer construction than basic foil ducting. It is well suited to ventilation systems where ductwork needs to negotiate equipment, corners or other obstacles while remaining easy to position.
The flexible construction allows the duct to be extended, routed and cut to the required length, making this 5 metre section a practical choice for connecting ventilation equipment where rigid ductwork would be less convenient.
With a nominal diameter of 102mm / 4", it is designed for use with compatible fans, filters, connectors, reducers and other round ventilation components.
Why choose COMBI ducting?
- Reinforced flexible construction - designed to provide a more robust ducting solution while retaining installation flexibility.
- 102mm / 4" diameter - suitable for compatible 4-inch round ventilation systems.
- 5 metre length - provides a useful length for connecting ventilation equipment or cutting into shorter sections.
- Suitable for extraction - designed for carrying extracted air through a compatible ventilation system.
- Suitable for air intake - can also be incorporated into compatible fresh-air intake systems.
- Flexible routing - useful where ductwork needs to pass around equipment or changes in direction.
- Can be cut to length - use only the amount required for each installation.
- Compatible with common ventilation equipment - suitable for matching fans, filters and round duct fittings.
- Easy to secure - compatible connections can be mechanically fixed using appropriately sized ducting clips or clamps.
Flexible ducting for controlled environment ventilation
Effective ventilation depends on moving air between components with as little unnecessary resistance as practical. Flexible COMBI ducting makes it easier to create a complete duct route without requiring rigid sections throughout the installation.
It is suitable for connecting compatible extraction fans, air filters and ventilation fittings in propagation areas, growing areas, nurseries and other controlled horticultural environments.
The 5 metre length is particularly useful for individual ventilation runs, equipment connections and installations where several shorter sections of 102mm ducting are required.
Installing 102mm COMBI ducting
Extend the ducting to the required length and plan the route before making the final connections. Keeping the duct run reasonably direct helps reduce unnecessary airflow resistance.
Avoid excessively tight bends, severe compression or crushing the duct, as restrictions in the airflow path can reduce ventilation performance.
Fit the duct securely over compatible 102mm connections and use an appropriately sized ducting clip or clamp to create a reliable mechanical fixing. Suitable HVAC foil tape can also be used where additional air sealing is required.
Support the duct where necessary to prevent excessive sagging and to maintain a clean, unrestricted airflow path between components.
Getting the best airflow from flexible ducting
For efficient airflow, use the shortest practical duct route and minimise unnecessary bends. Flexible ducting should be extended sufficiently to avoid excessive bunching or compression between components.
Where a change in direction is required, a gradual bend is preferable to a tightly folded section. Keeping the internal airflow path as open as possible helps the connected fan operate more effectively.
Fan performance should be considered across the complete ventilation system, including duct length, bends, filters, silencers, reducers and other fittings installed in the airflow path.
102mm (4") x 5m COMBI Ducting product details
| Product type | Reinforced flexible ventilation ducting |
|---|---|
| Nominal diameter | 102mm / 4" |
| Length | 5m |
| Duct type | Flexible |
| Primary purpose | Air extraction & intake ventilation |
| Compatible system size | Nominal 102mm / 4" round ventilation systems |
| Suitable connections | Compatible fans, filters, connectors, reducers & round ventilation fittings |
| Suitable applications | Controlled environment, propagation, nursery, growing area & general ventilation installations |
102mm (4") x 5m COMBI Ducting FAQs
What diameter is this COMBI ducting?
This version has a nominal diameter of 102mm, commonly referred to as 4-inch ducting.
How long is the ducting?
This product is supplied as a 5 metre length.
Can COMBI ducting be used with a 4-inch extraction fan?
Yes, it can be used with compatible fans designed for nominal 102mm / 4" ventilation connections.
Can it connect to a carbon filter?
Yes. The ducting can be connected to a compatible 102mm carbon filter or to suitable adapters where different component sizes are being combined.
Can COMBI ducting be used for air intake?
Yes. It can be used for both extraction and intake applications within a compatible ventilation system.
Can I cut the 5m duct to shorter lengths?
Yes. Flexible ducting can be cut to suit the installation, allowing a single length to be divided into shorter sections where required.
How should COMBI ducting be attached?
Fit the duct over a compatible connection and secure it with an appropriately sized ducting clip or clamp. HVAC foil tape can be added where further air sealing is required.
Can the ducting bend around obstacles?
Yes. Its flexible construction allows it to be routed around equipment and obstacles, although gradual bends are preferable to tight folds or sharp restrictions.
Do bends in flexible ducting reduce airflow?
Excessive duct length, tight bends and compressed sections can increase resistance to airflow, so a direct and unrestricted route is preferable.
Can this ducting be used with reducers and connectors?
Yes. Compatible round connectors, reducers, elbows and other ventilation fittings can be incorporated into the duct system as required.
Should flexible ducting be fully extended?
Where practical, extending the duct rather than leaving it heavily compressed helps create a smoother airflow path and reduces unnecessary restriction.
Does flexible ducting need supporting?
It should be supported where necessary to prevent excessive sagging, particularly across horizontal runs or between widely spaced connection points.
Is COMBI ducting the same as acoustic ducting?
No. COMBI ducting is primarily a reinforced flexible air duct. Acoustic ducting incorporates additional insulation specifically intended to help reduce the transmission of fan and airflow noise.
Is this suitable for horticultural ventilation?
Yes. It is suitable for compatible ventilation systems used in propagation, nursery and controlled growing environments, as well as general ventilation applications.
102mm (4”) x 5m COMBI Ducting - Reinforced Flexible Ventilation Duct
Please sign in to see pricing
345
£3.45
Unit price per102mm (4") x 5m COMBI Ducting is a flexible reinforced ventilation duct designed for reliable air movement in extraction and intake systems.
COMBI ducting combines the flexibility required for straightforward installation with a more robust outer construction than basic foil ducting. It is well suited to ventilation systems where ductwork needs to negotiate equipment, corners or other obstacles while remaining easy to position.
The flexible construction allows the duct to be extended, routed and cut to the required length, making this 5 metre section a practical choice for connecting ventilation equipment where rigid ductwork would be less convenient.
With a nominal diameter of 102mm / 4", it is designed for use with compatible fans, filters, connectors, reducers and other round ventilation components.
Why choose COMBI ducting?
- Reinforced flexible construction - designed to provide a more robust ducting solution while retaining installation flexibility.
- 102mm / 4" diameter - suitable for compatible 4-inch round ventilation systems.
- 5 metre length - provides a useful length for connecting ventilation equipment or cutting into shorter sections.
- Suitable for extraction - designed for carrying extracted air through a compatible ventilation system.
- Suitable for air intake - can also be incorporated into compatible fresh-air intake systems.
- Flexible routing - useful where ductwork needs to pass around equipment or changes in direction.
- Can be cut to length - use only the amount required for each installation.
- Compatible with common ventilation equipment - suitable for matching fans, filters and round duct fittings.
- Easy to secure - compatible connections can be mechanically fixed using appropriately sized ducting clips or clamps.
Flexible ducting for controlled environment ventilation
Effective ventilation depends on moving air between components with as little unnecessary resistance as practical. Flexible COMBI ducting makes it easier to create a complete duct route without requiring rigid sections throughout the installation.
It is suitable for connecting compatible extraction fans, air filters and ventilation fittings in propagation areas, growing areas, nurseries and other controlled horticultural environments.
The 5 metre length is particularly useful for individual ventilation runs, equipment connections and installations where several shorter sections of 102mm ducting are required.
Installing 102mm COMBI ducting
Extend the ducting to the required length and plan the route before making the final connections. Keeping the duct run reasonably direct helps reduce unnecessary airflow resistance.
Avoid excessively tight bends, severe compression or crushing the duct, as restrictions in the airflow path can reduce ventilation performance.
Fit the duct securely over compatible 102mm connections and use an appropriately sized ducting clip or clamp to create a reliable mechanical fixing. Suitable HVAC foil tape can also be used where additional air sealing is required.
Support the duct where necessary to prevent excessive sagging and to maintain a clean, unrestricted airflow path between components.
Getting the best airflow from flexible ducting
For efficient airflow, use the shortest practical duct route and minimise unnecessary bends. Flexible ducting should be extended sufficiently to avoid excessive bunching or compression between components.
Where a change in direction is required, a gradual bend is preferable to a tightly folded section. Keeping the internal airflow path as open as possible helps the connected fan operate more effectively.
Fan performance should be considered across the complete ventilation system, including duct length, bends, filters, silencers, reducers and other fittings installed in the airflow path.
102mm (4") x 5m COMBI Ducting product details
| Product type | Reinforced flexible ventilation ducting |
|---|---|
| Nominal diameter | 102mm / 4" |
| Length | 5m |
| Duct type | Flexible |
| Primary purpose | Air extraction & intake ventilation |
| Compatible system size | Nominal 102mm / 4" round ventilation systems |
| Suitable connections | Compatible fans, filters, connectors, reducers & round ventilation fittings |
| Suitable applications | Controlled environment, propagation, nursery, growing area & general ventilation installations |
102mm (4") x 5m COMBI Ducting FAQs
What is COMBI ducting?
COMBI ducting is flexible ventilation ducting with a reinforced outer construction, providing a practical and robust way to connect ventilation equipment while retaining the flexibility needed for installation.
What diameter is this COMBI ducting?
This version has a nominal diameter of 102mm, commonly referred to as 4-inch ducting.
How long is the ducting?
This product is supplied as a 5 metre length.
Can COMBI ducting be used with a 4-inch extraction fan?
Yes, it can be used with compatible fans designed for nominal 102mm / 4" ventilation connections.
Can it connect to a carbon filter?
Yes. The ducting can be connected to a compatible 102mm carbon filter or to suitable adapters where different component sizes are being combined.
Can COMBI ducting be used for air intake?
Yes. It can be used for both extraction and intake applications within a compatible ventilation system.
Can I cut the 5m duct to shorter lengths?
Yes. Flexible ducting can be cut to suit the installation, allowing a single length to be divided into shorter sections where required.
How should COMBI ducting be attached?
Fit the duct over a compatible connection and secure it with an appropriately sized ducting clip or clamp. HVAC foil tape can be added where further air sealing is required.
Can the ducting bend around obstacles?
Yes. Its flexible construction allows it to be routed around equipment and obstacles, although gradual bends are preferable to tight folds or sharp restrictions.
Do bends in flexible ducting reduce airflow?
Excessive duct length, tight bends and compressed sections can increase resistance to airflow, so a direct and unrestricted route is preferable.
Can this ducting be used with reducers and connectors?
Yes. Compatible round connectors, reducers, elbows and other ventilation fittings can be incorporated into the duct system as required.
Should flexible ducting be fully extended?
Where practical, extending the duct rather than leaving it heavily compressed helps create a smoother airflow path and reduces unnecessary restriction.
Does flexible ducting need supporting?
It should be supported where necessary to prevent excessive sagging, particularly across horizontal runs or between widely spaced connection points.
Is COMBI ducting the same as acoustic ducting?
No. COMBI ducting is primarily a reinforced flexible air duct. Acoustic ducting incorporates additional insulation specifically intended to help reduce the transmission of fan and airflow noise.
Is this suitable for horticultural ventilation?
Yes. It is suitable for compatible ventilation systems used in propagation, nursery and controlled growing environments, as well as general ventilation applications.
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345
£3.45
Unit price per