What is COMBI ducting?
COMBI ducting is flexible ventilation ducting with a reinforced outer construction, providing a practical way to connect ventilation equipment while retaining the flexibility needed for installation.
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317mm (12.5”) x 10m COMBI Ducting - Reinforced Flexible Ventilation Duct
Please sign in to see pricing
1990
£19.90
Unit price perEstimated delivery between November 01 and November 03.
317mm (12.5") x 10m COMBI Ducting is a large-diameter 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. Its large 317mm diameter makes it particularly suitable for higher-airflow ventilation systems using correspondingly sized fans, filters and fittings.
Supplied in a generous 10 metre length, the duct can be used for a longer continuous run or cut into multiple shorter sections to suit the installation.
Why choose COMBI ducting?
- Reinforced flexible construction - combines practical installation flexibility with a more robust outer construction than basic foil ducting.
- 317mm / 12.5" diameter - designed for compatible large-diameter round ventilation systems.
- 10 metre length - useful for longer ventilation runs or cutting into several shorter sections.
- Suitable for extraction - ideal for carrying extracted air through compatible ventilation equipment.
- Suitable for air intake - can also be incorporated into compatible fresh-air intake systems.
- Large airflow capacity - the 317mm diameter is suited to ventilation systems designed to move substantial volumes of air.
- Flexible routing - easier to position around equipment and changes in direction than rigid ductwork.
- Can be cut to length - use only the amount required rather than leaving unnecessary ducting in the airflow path.
- Compatible with ventilation equipment - suitable for matching fans, filters, connectors and round duct fittings.
Large-diameter flexible ventilation ducting
Larger ventilation installations often require greater airflow capacity, making duct diameter an important part of system design. This 317mm COMBI ducting provides a flexible connection between compatible high-airflow ventilation components without requiring rigid ductwork throughout the entire system.
It can be used to connect appropriately sized extraction fans, air filters and ventilation fittings in propagation facilities, nurseries, growing areas and other controlled environments.
The 10 metre length is particularly useful where a longer duct run is required or where several shorter sections are needed from a single length.
Installing 317mm COMBI ducting
Plan the duct route before making the final connections and cut the ducting to the length actually required. Keeping the route reasonably short and direct helps minimise unnecessary airflow resistance.
Avoid excessively tight bends, severe compression or crushing the duct. Restrictions become particularly important in higher-airflow systems because unnecessary resistance can affect overall ventilation performance.
Fit the duct securely over compatible 317mm connections and use an appropriately sized ducting clip or clamp to provide a reliable mechanical fixing. Suitable HVAC foil tape can also be used where additional air sealing is required.
Longer horizontal runs should be supported at suitable intervals to reduce sagging and help maintain a clear airflow path.
Getting the best airflow from 317mm ducting
The performance of a ventilation system depends on more than fan capacity alone. Duct diameter, total duct length, bends, filters, reducers and other fittings all contribute to resistance within the airflow path.
Keep flexible ducting as straight and properly extended as practical. Where a direction change is required, use a gradual bend rather than sharply folding or compressing the duct.
There is no need to use the entire 10 metre length where a shorter run will do the job. Cutting the duct to the required length can reduce unnecessary resistance and create a cleaner installation.
317mm (12.5") x 10m COMBI Ducting product details
| Product type | Reinforced flexible ventilation ducting |
|---|---|
| Nominal diameter | 317mm / 12.5" |
| Length | 10m |
| Duct type | Flexible |
| Primary purpose | Air extraction & intake ventilation |
| Compatible system size | Nominal 317mm / 12.5" round ventilation systems |
| Suitable connections | Compatible fans, filters, connectors, reducers & round ventilation fittings |
| Suitable applications | Controlled environment, propagation, nursery, growing area & general ventilation installations |
317mm (12.5") x 10m COMBI Ducting FAQs
What diameter is this COMBI ducting?
This version has a nominal diameter of 317mm, commonly referred to as 12.5-inch ducting.
How long is the ducting?
This product is supplied as a 10 metre length.
What is 317mm ducting typically used for?
Its large diameter makes it suitable for compatible higher-airflow extraction and intake systems using correspondingly sized ventilation equipment.
Can it be connected to an extraction fan?
Yes. It can be used with a compatible fan designed for a nominal 317mm / 12.5" duct connection.
Can 317mm COMBI ducting connect to an air filter?
Yes. It can be connected to compatible 317mm filters or incorporated into systems using suitable reducers and adapters where component sizes differ.
Can COMBI ducting be used for air intake?
Yes. It is suitable for both extraction and intake applications within an appropriately designed ventilation system.
Can I cut the 10m duct into shorter lengths?
Yes. The ducting can be cut to suit the installation, making the 10 metre length useful where several separate sections are required.
Do I need to use the entire 10m length?
No. Use only the length required for the installation. Keeping duct runs reasonably short and direct can help reduce unnecessary airflow resistance.
How should 317mm COMBI ducting be attached?
Fit the duct over the compatible connection and secure it using an appropriately sized ducting clip or clamp. HVAC foil tape can be used where additional air sealing is required.
Can this ducting bend around obstacles?
Yes. The flexible construction allows the duct to be routed around equipment and obstacles, although gradual bends are preferable to tight folds.
Do bends reduce airflow?
Tight bends, excessive duct length and compressed sections can increase airflow resistance. Keeping the route direct and unrestricted helps maintain system performance.
Can I use a reducer with 317mm COMBI ducting?
Yes. A suitable ventilation reducer can be used to transition between different duct diameters where required by the system design.
Should long runs of flexible ducting be supported?
Yes. Supporting longer duct runs helps prevent excessive sagging and keeps the intended airflow path open.
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 transmitted fan and airflow noise.
317mm (12.5”) x 10m COMBI Ducting - Reinforced Flexible Ventilation Duct
Please sign in to see pricing
1990
£19.90
Unit price perBack in Stock
Sign up to be the first to know when it's back in stock.
317mm (12.5") x 10m COMBI Ducting is a large-diameter 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. Its large 317mm diameter makes it particularly suitable for higher-airflow ventilation systems using correspondingly sized fans, filters and fittings.
Supplied in a generous 10 metre length, the duct can be used for a longer continuous run or cut into multiple shorter sections to suit the installation.
Why choose COMBI ducting?
- Reinforced flexible construction - combines practical installation flexibility with a more robust outer construction than basic foil ducting.
- 317mm / 12.5" diameter - designed for compatible large-diameter round ventilation systems.
- 10 metre length - useful for longer ventilation runs or cutting into several shorter sections.
- Suitable for extraction - ideal for carrying extracted air through compatible ventilation equipment.
- Suitable for air intake - can also be incorporated into compatible fresh-air intake systems.
- Large airflow capacity - the 317mm diameter is suited to ventilation systems designed to move substantial volumes of air.
- Flexible routing - easier to position around equipment and changes in direction than rigid ductwork.
- Can be cut to length - use only the amount required rather than leaving unnecessary ducting in the airflow path.
- Compatible with ventilation equipment - suitable for matching fans, filters, connectors and round duct fittings.
Large-diameter flexible ventilation ducting
Larger ventilation installations often require greater airflow capacity, making duct diameter an important part of system design. This 317mm COMBI ducting provides a flexible connection between compatible high-airflow ventilation components without requiring rigid ductwork throughout the entire system.
It can be used to connect appropriately sized extraction fans, air filters and ventilation fittings in propagation facilities, nurseries, growing areas and other controlled environments.
The 10 metre length is particularly useful where a longer duct run is required or where several shorter sections are needed from a single length.
Installing 317mm COMBI ducting
Plan the duct route before making the final connections and cut the ducting to the length actually required. Keeping the route reasonably short and direct helps minimise unnecessary airflow resistance.
Avoid excessively tight bends, severe compression or crushing the duct. Restrictions become particularly important in higher-airflow systems because unnecessary resistance can affect overall ventilation performance.
Fit the duct securely over compatible 317mm connections and use an appropriately sized ducting clip or clamp to provide a reliable mechanical fixing. Suitable HVAC foil tape can also be used where additional air sealing is required.
Longer horizontal runs should be supported at suitable intervals to reduce sagging and help maintain a clear airflow path.
Getting the best airflow from 317mm ducting
The performance of a ventilation system depends on more than fan capacity alone. Duct diameter, total duct length, bends, filters, reducers and other fittings all contribute to resistance within the airflow path.
Keep flexible ducting as straight and properly extended as practical. Where a direction change is required, use a gradual bend rather than sharply folding or compressing the duct.
There is no need to use the entire 10 metre length where a shorter run will do the job. Cutting the duct to the required length can reduce unnecessary resistance and create a cleaner installation.
317mm (12.5") x 10m COMBI Ducting product details
| Product type | Reinforced flexible ventilation ducting |
|---|---|
| Nominal diameter | 317mm / 12.5" |
| Length | 10m |
| Duct type | Flexible |
| Primary purpose | Air extraction & intake ventilation |
| Compatible system size | Nominal 317mm / 12.5" round ventilation systems |
| Suitable connections | Compatible fans, filters, connectors, reducers & round ventilation fittings |
| Suitable applications | Controlled environment, propagation, nursery, growing area & general ventilation installations |
317mm (12.5") x 10m COMBI Ducting FAQs
What is COMBI ducting?
COMBI ducting is flexible ventilation ducting with a reinforced outer construction, providing a practical 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 317mm, commonly referred to as 12.5-inch ducting.
How long is the ducting?
This product is supplied as a 10 metre length.
What is 317mm ducting typically used for?
Its large diameter makes it suitable for compatible higher-airflow extraction and intake systems using correspondingly sized ventilation equipment.
Can it be connected to an extraction fan?
Yes. It can be used with a compatible fan designed for a nominal 317mm / 12.5" duct connection.
Can 317mm COMBI ducting connect to an air filter?
Yes. It can be connected to compatible 317mm filters or incorporated into systems using suitable reducers and adapters where component sizes differ.
Can COMBI ducting be used for air intake?
Yes. It is suitable for both extraction and intake applications within an appropriately designed ventilation system.
Can I cut the 10m duct into shorter lengths?
Yes. The ducting can be cut to suit the installation, making the 10 metre length useful where several separate sections are required.
Do I need to use the entire 10m length?
No. Use only the length required for the installation. Keeping duct runs reasonably short and direct can help reduce unnecessary airflow resistance.
How should 317mm COMBI ducting be attached?
Fit the duct over the compatible connection and secure it using an appropriately sized ducting clip or clamp. HVAC foil tape can be used where additional air sealing is required.
Can this ducting bend around obstacles?
Yes. The flexible construction allows the duct to be routed around equipment and obstacles, although gradual bends are preferable to tight folds.
Do bends reduce airflow?
Tight bends, excessive duct length and compressed sections can increase airflow resistance. Keeping the route direct and unrestricted helps maintain system performance.
Can I use a reducer with 317mm COMBI ducting?
Yes. A suitable ventilation reducer can be used to transition between different duct diameters where required by the system design.
Should long runs of flexible ducting be supported?
Yes. Supporting longer duct runs helps prevent excessive sagging and keeps the intended airflow path open.
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 transmitted fan and airflow noise.
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1990
£19.90
Unit price per