317mm (12.5”) x 10m Acoustic Ducting - Insulated Flexible Ventilation Duct

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317mm (12.5") x 10m Acoustic Ducting is a large-diameter insulated flexible ventilation duct designed to help reduce fan and airflow noise transmitted through high-capacity extraction and intake systems.

Powerful ventilation systems generate sound from both the fan itself and the movement of large volumes of air. Standard uninsulated ducting can allow this noise to travel along the ventilation route, while acoustic ducting incorporates an insulating layer around the inner duct to help absorb transmitted sound.

This makes it particularly useful for indoor horticulture, commercial growing areas and controlled growing environments where substantial ventilation equipment may operate for extended periods and controlling unnecessary noise is important.

Supplied in a generous 10 metre length with a nominal 317mm / 12.5" diameter, it can be connected to compatible high-capacity fans, carbon filters and ventilation fittings. The flexible construction allows it to be routed around equipment and cut into the exact lengths required for the installation.

Why choose 317mm acoustic ducting?

  • Helps reduce ventilation noise - acoustic insulation helps absorb sound transmitted through the ductwork.
  • 317mm / 12.5" diameter - designed for compatible large-diameter ventilation equipment.
  • 10 metre length - ideal for longer ventilation routes or cutting into several individual sections.
  • Insulated construction - designed to reduce transmitted sound compared with basic uninsulated flexible ducting.
  • Flexible installation - allows large ductwork to be routed around fans, filters and other ventilation equipment.
  • Suitable for extraction - ideal for high-capacity air removal from controlled growing environments.
  • Suitable for intake - can also be incorporated into compatible fresh-air intake systems.
  • Cut to length - use only the amount required for each part of the ventilation installation.
  • Suitable for larger horticultural environments - ideal where substantial airflow and reduced transmitted noise are both required.

How does acoustic ducting reduce noise?

Noise within a ventilation system can come from the fan motor, vibration and turbulent air moving through the ductwork. With larger ventilation systems, substantial airflow can make transmitted sound particularly noticeable.

Acoustic ducting surrounds the flexible inner airflow passage with insulation designed to absorb transmitted sound. This helps reduce the amount of fan and airflow noise travelling through the duct route.

It can be particularly useful around high-capacity extraction fans, between compatible fans and carbon filters, and along longer sections of ductwork where transmitted ventilation noise needs to be controlled.

Acoustic ducting is intended to reduce transmitted noise rather than make a ventilation system completely silent. Fan design, fan speed, airflow velocity, vibration and installation quality all contribute to the final noise level.

Large-diameter acoustic ducting for indoor horticulture

Larger indoor horticultural environments can require substantial air movement to manage temperature, humidity and air exchange. High-capacity extraction and intake systems can consequently become a significant source of environmental-control noise.

Acoustic ducting provides a practical way to reduce sound transmission while maintaining the flexibility needed to connect large ventilation components and route air through the installation.

The 317mm / 12.5" diameter is suitable for compatible high-capacity ventilation systems using appropriately sized inline fans, carbon filters, connectors and other round duct fittings.

The 10m length is particularly useful for larger growing areas, longer ventilation routes or installations requiring several separate sections of acoustic ducting.

Getting the best airflow from acoustic ducting

Correct installation is particularly important with large-diameter ventilation systems. Every length of duct, bend and fitting introduces resistance that the fan must overcome.

Flexible ducting should be extended sufficiently rather than left heavily compressed. This provides a smoother internal path for moving air and helps minimise unnecessary resistance and turbulence.

Keep the ventilation route as short and direct as practical. Avoid crushed sections and excessively tight bends, using gradual changes in direction wherever possible.

Although 10 metres of ducting is supplied, there is no requirement to use the complete length in one continuous run. Cutting each section to the length actually required can help minimise unnecessary airflow resistance.

Installing 317mm acoustic ducting

Before installation, check that the fan, carbon filter and other ventilation components have compatible nominal 317mm / 12.5" connections.

Fit the flexible inner duct securely over the ventilation connection and fasten it using a suitably sized duct clamp or appropriate fixing. HVAC foil tape can also be used where additional sealing is required.

Arrange the surrounding insulation and outer covering neatly around the completed connection so that the acoustic layer remains as continuous as practical.

Large-diameter insulated ducting can become bulky and relatively heavy over longer runs. Support the duct appropriately rather than allowing its full weight to hang directly from a fan, carbon filter or connecting fitting.

Compatible ventilation equipment

  • Compatible 317mm / 12.5" inline extraction fans
  • Compatible large-diameter carbon filters
  • Ventilation silencers
  • Rigid round ductwork
  • Duct connectors and couplers
  • Elbows and bends
  • Reducers and adapters
  • Duct clamps and fixing accessories

Check the actual connection diameter of individual ventilation components before installation, as nominal sizes and connection dimensions can vary between manufacturers.

317mm (12.5") x 10m Acoustic Ducting product details

Product type Insulated acoustic flexible ducting
Nominal diameter 317mm / 12.5"
Length 10m
Duct type Flexible
Construction Acoustically insulated flexible ventilation duct
Primary purpose Air movement with reduced transmission of ventilation noise
Suitable airflow Extraction & intake
Compatible system size Nominal 317mm / 12.5" round ventilation systems
Suitable applications Indoor horticulture, commercial growing areas, controlled growing environments & compatible ventilation installations

317mm (12.5") Acoustic Ducting FAQs

What is acoustic ducting?

Acoustic ducting is insulated flexible ventilation duct designed to help absorb and reduce sound transmitted through an extraction or intake system.

What size is this acoustic duct?

This version has a nominal diameter of 317mm, equivalent to 12.5 inches, and is supplied in a 10 metre length.

What is 317mm acoustic ducting typically used for?

Its large diameter makes it suitable for compatible high-capacity ventilation systems where substantial volumes of air need to be moved.

Can it be used with a carbon filter?

Yes. It can be used with a carbon filter that has a compatible nominal 317mm / 12.5" connection.

Does acoustic ducting reduce fan noise?

It helps reduce fan and airflow sound transmitted along the ductwork. It does not completely eliminate noise generated directly by the fan.

Is acoustic ducting quieter than ordinary flexible ducting?

Its insulating layer is specifically intended to absorb transmitted sound, making it useful where reducing ventilation noise is important.

Can acoustic ducting be used for horticultural extraction?

Yes. It is well suited to indoor horticultural ventilation systems where temperature, humidity and air exchange need to be managed while keeping transmitted ventilation noise under control.

Can it be used for air intake?

Yes. Acoustic ducting can be incorporated into compatible intake as well as extraction systems.

Can I cut the 10m duct into shorter sections?

Yes. It can be cut to suit the required ventilation route or divided into several individual sections.

Do I need to use the full 10 metre length?

No. Use only the amount required for the installation. Keeping duct routes reasonably short and direct generally helps minimise unnecessary airflow resistance.

Should flexible acoustic ducting be fully extended?

It should be extended sufficiently for the installation rather than left unnecessarily compressed. This helps create a smoother internal path for airflow.

Do bends in acoustic ducting affect airflow?

Yes. Tight bends increase resistance and turbulence, so smooth and gradual changes in direction are preferable wherever possible.

Does a longer duct run affect extraction performance?

Every length of duct introduces some resistance. Longer runs, multiple bends and additional fittings can therefore reduce the effective airflow of a ventilation system.

Does large acoustic ducting need supporting?

Yes. Large-diameter insulated duct should be supported appropriately so its weight is not carried entirely by the fan, filter or connecting fittings.

How can horticultural ventilation noise be reduced further?

Correct fan sizing, sensible duct routing, vibration isolation, suitable fan-speed control and ventilation silencers can be combined with acoustic ducting to create a quieter overall system.

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£23.95