Blauberg Insulated Flexible Ducting - 125mm - 10m
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Product Information
Full details
The Blauberg SonoFlex-125-10 is designed for HVAC professionals and DIYers who need a high-performance 125mm diameter ventilation solution that prioritizes acoustic and thermal efficiency. It is an ideal choice for residential or commercial projects requiring noise reduction and condensation control in complex layouts, though the insulated layer makes it bulkier and less maneuverable in extremely tight spaces than non-insulated alternatives.
All features
| Model Part Number | SONOFLEX-125-10 |
|---|---|
| Brand | Blauberg |
Extended Product Information
FAQs
Is this ducting fire-rated?
The SonoFlex-125-10 complies with UK building regulations for ventilation, but always check project-specific fire safety requirements for commercial installations.
Can I use this for tumble dryer venting?
This ducting is designed for ventilation and heat recovery systems. It is generally not recommended for tumble dryers, which require smooth-bore metal ducting to prevent lint buildup and fire hazards.
How do I cut the duct to length?
Use a utility knife to cut the outer jacket and insulation, then use wire cutters to snip the internal steel helix wire.
What is the outside diameter of the duct?
Because of the integrated insulation layer, the outer diameter is significantly larger than the internal 125mm bore. Ensure you have clearance before installing in tight voids.
Can this be used for intake and extract air?
Yes, it is suitable for both supply and extract lines in HVAC systems.
Troubleshooting
Airflow is restricted or noisy
Check for sharp kinks or excessive sagging in the duct run. Straighten out the line as much as possible.
Condensation leaking at connections
Verify that the vapor barrier is properly sealed using foil-backed duct tape to prevent warm air from hitting the cold surface of the coupling.
Difficulty connecting to spigots
Ensure the internal liner is pulled fully over the spigot before tightening the jubilee clip to prevent air leakage.
Pros and Cons
Pros
- Significantly quieter operation than non-insulated ducting
- Prevents internal condensation effectively
- Compliant with UK building regulations
- Flexible enough for complex installation routes
- Durable construction suitable for diverse environments
Cons
- Larger outer diameter makes it harder to fit in narrow ceiling voids
- Heavier than standard plastic flex ducting
- Cutting requires specialized tools to prevent fiberglass fraying
Setup, Compatibility & Care
When installing the SonoFlex, ensure the duct is pulled taut to minimize airflow resistance; sagging sections can act as traps for moisture. Use high-quality ducting tape or jubilee clips to secure connections to spigots. Avoid sharp bends that kink the inner liner, as this can restrict airflow and increase noise. For maintenance, periodically inspect the connections to ensure they remain airtight. If the ducting passes through fire-rated partitions, ensure that intumescent fire stopping is used as required by local building regulations. When cutting, use a sharp craft knife for the outer jacket and wire cutters for the internal support helix.