Free delivery available | Free Help & Advice: hello@efans.co.uk | Mon - Fri 9:00am - 5:00pm

Next Working Day Delivery

On select items. Order by 12pm

Credit Accounts

Pay on 30-day terms

Easy 14 day returns

No quibble easy returns

Trustpilot Rated Excellent

4.9 out of 5 stars

Insulated Ducting

20 products

Insulated flexible ducting has an aluminium inner core wrapped in glass wool insulation with an outer sleeve, which cuts condensation, heat loss and noise on ventilation runs. It is the duct to use where an extractor fan or MVHR run passes through a cold loft or void. We stock Systemair insulated ducting from 82mm to 406mm, eFans Direct insulated ducting in 100mm, 125mm, 150mm and 204mm, and Domus EasiPipe insulated flexible duct in 102mm, 125mm and 150mm, all in 10m lengths. Use the size buttons below to filter, or for trade pricing, email hello@efans.co.uk or call 0161 399 3825.

Read moreRead less

Frequently asked questions

Why use insulated ducting?

When warm, moist air from a bathroom or kitchen runs through a cold loft, the moisture condenses inside an uninsulated duct and can run back into the fan or drip through the ceiling. The insulation keeps the air warm along the run, which stops the condensation. It also reduces heat loss and noise.

Do I need insulated ducting for a bathroom extractor fan in the loft?

Yes, if the duct runs through an unheated loft or void. Insulate the whole length in the cold space, keep the run as short as possible, and fall the duct slightly away from the fan towards the outlet so any condensate drains outside rather than back into the fan.

Is insulated ducting needed for MVHR?

Yes, ducts running through unheated spaces on an MVHR system should be insulated, both to stop condensation and to protect the heat the system recovers. The outdoor intake and exhaust ducts also need insulating where they run through heated space. Check the insulation requirement in your system design or the Domestic Ventilation Compliance Guide.

What sizes do you stock?

From 82mm up to 406mm diameter, all in 10m lengths. Many sizes are imperial: 102mm, 127mm, 152mm and 203mm fit 100mm, 125mm, 150mm and 200mm spigots. Use the size buttons above the products to filter.

How do I fit insulated ducting?

Pull back the insulation and outer sleeve, push the inner core over the spigot and secure it with a hose clip and foil tape. Then pull the insulation back over the joint and tape the outer sleeve so there is no cold spot. Keep the duct fully extended and supported.

Insulated, aluminium or combi ducting?

Use insulated ducting wherever the run passes through a cold space. Aluminium ducting suits short connections and warm air within heated space. Combi ducting adds a PVC outer for durability where the duct may be knocked.

82mm 100mm 125mm 150mm 160mm 180mm 200mm 230mm 250mm 300mm 315mm 355mm 400mm

Showing 1 - 20 of 20 products

Insulated aluminium flexible ducting by Systemair, 127mm diameter and 10m length, shown coiled and ready for ventilation installation.

Insulated aluminium flexible ducting by Systemair, 127mm diameter and 10m length, shown coiled and ready for ventilation installation.

In stock

Next day delivery
available

Systemair

Flexible Ducting Insulated Aluminium 127mm x 10m Length

127mm
10m length
Insulated aluminium

In stock

Next day delivery available

£63.99

Flexible insulated aluminium ducting from Systemair, 203mm diameter and 10m length, shown rolled out with shiny metallic surface.

Flexible insulated aluminium ducting from Systemair, 203mm diameter and 10m length, shown rolled out with shiny metallic surface.

In stock

Next day delivery
available

Systemair

Flexible Ducting Insulated Aluminium 203mm x 10m Length

203mm
10m length
Insulated aluminium

In stock

Next day delivery available

£96.06

Insulated aluminium flexible ducting by Systemair, 152mm diameter, 10m length for ventilation and HVAC applications.

Insulated aluminium flexible ducting by Systemair, 152mm diameter, 10m length for ventilation and HVAC applications.

In stock

Next day delivery
available

Systemair

Flexible Ducting Insulated Aluminium 152mm x 10m Length

152mm
10m length
Insulated aluminium

In stock

Next day delivery available

£77.25

Flexible insulated aluminium ducting by Domus Ventilation, 102mm diameter, 10m length for HVAC ventilation systems.

Flexible insulated aluminium ducting by Domus Ventilation, 102mm diameter, 10m length for HVAC ventilation systems.

In stock

Next day delivery
available

domus ventilation

Domus - 4210 EasiPipe Round Flexible Ducting Insulated Aluminium 102mm x 10m

102mm
10m length
Insulated aluminium

In stock

Next day delivery available

£43.24

Flexible insulated ducting in 100mm diameter and 10m length, designed for efficient air ventilation by eFans.

Flexible insulated ducting in 100mm diameter and 10m length, designed for efficient air ventilation by eFans.

In stock

Next day delivery
available

eFans SKU: EFFDI127

Flexible Ducting Insulated 125mm x 10m Length

125mm
10m length
Insulated aluminium

In stock

Next day delivery available

£46.66

Flexible insulated aluminium ducting in 160mm diameter, 10m length for ventilation systems by Systemair.

Flexible insulated aluminium ducting in 160mm diameter, 10m length for ventilation systems by Systemair.

In stock

Next day delivery
available

Systemair

Flexible Ducting Insulated Aluminium 160mm x 10m Length

160mm
10m length
Insulated aluminium

In stock

Next day delivery available

£78.99

Flexible insulated aluminium ducting from Systemair, 102mm diameter and 10m long, shown coiled with shiny metallic surface.

Flexible insulated aluminium ducting from Systemair, 102mm diameter and 10m long, shown coiled with shiny metallic surface.

In stock

Next day delivery
available

Systemair

Flexible Ducting Insulated Aluminium 102mm x 10m Length

102mm
10m length
Insulated aluminium

In stock

Next day delivery available

£56.99

Flexible insulated ducting in 100mm diameter and 10m length, designed for efficient air ventilation by eFans.

Flexible insulated ducting in 100mm diameter and 10m length, designed for efficient air ventilation by eFans.

In stock

Next day delivery
available

eFans SKU: EFFDI152

Flexible Ducting Insulated 150mm x 10m Length

150mm
10m length
Insulated aluminium

In stock

Next day delivery available

£75.99

Flexible insulated ducting in 100mm diameter and 10m length, designed for efficient air ventilation by eFans.

Flexible insulated ducting in 100mm diameter and 10m length, designed for efficient air ventilation by eFans.

In stock

Next day delivery
available

eFans SKU: EFFDI102

Flexible Ducting Insulated 100mm x 10m Length

100mm
10m length
Insulated aluminium

In stock

Next day delivery available

£36.53

Insulated aluminium flexible ducting from Systemair, 180mm diameter and 10 meters long, coiled with reflective metal surface.

Insulated aluminium flexible ducting from Systemair, 180mm diameter and 10 meters long, coiled with reflective metal surface.

In stock

Next day delivery
available

Systemair

Flexible Ducting Insulated Aluminium 180mm x 10m Length

180mm
10m length
Insulated aluminium

In stock

Next day delivery available

£86.99

Flexible insulated aluminium duct from Domus Ventilation, 150mm diameter, 10m length, with corrugated surface for ventilation systems.

Flexible insulated aluminium duct from Domus Ventilation, 150mm diameter, 10m length, with corrugated surface for ventilation systems.

In stock

Next day delivery
available

domus ventilation

Domus 6210 Insulated Aluminium Flexible Duct 150mm x 10m

150mm
10m length
Insulated aluminium

In stock

Next day delivery available

£106.69

Flexible insulated aluminium ducting in 125mm diameter, 10m length, by Domus Ventilation, suitable for ventilation and HVAC systems.

Flexible insulated aluminium ducting in 125mm diameter, 10m length, by Domus Ventilation, suitable for ventilation and HVAC systems.

In stock

Next day delivery
available

domus ventilation

Domus - 5210 EasiPipe Round Flexible Ducting Insulated Aluminium 125mm x 10m

125mm
10m length
Insulated aluminium

In stock

Next day delivery available

£94.59

Flexible insulated aluminium ducting from Systemair, 82mm diameter, 10m length, ideal for ventilation and air conditioning systems.

Flexible insulated aluminium ducting from Systemair, 82mm diameter, 10m length, ideal for ventilation and air conditioning systems.

In stock

Next day delivery
available

Systemair

Flexible Ducting Insulated Aluminium 82mm x 10m Length

82mm
10m length
Insulated aluminium

In stock

Next day delivery available

£47.05

Insulated aluminium flexible ducting by Systemair, 406mm diameter, 10m length, showing the shiny, corrugated duct material.

Insulated aluminium flexible ducting by Systemair, 406mm diameter, 10m length, showing the shiny, corrugated duct material.

In stock

Next day delivery
available

Systemair

Flexible Ducting Insulated Aluminium 406mm x 10m Length

406mm
10m length
Insulated aluminium

In stock

Next day delivery available

£195.99

Insulated aluminium flexible ducting by Systemair, 356mm diameter and 10m length, showing shiny metallic surface and flexible structure.

Insulated aluminium flexible ducting by Systemair, 356mm diameter and 10m length, showing shiny metallic surface and flexible structure.

In stock

Next day delivery
available

Systemair

Flexible Ducting Insulated Aluminium 356mm x 10m Length

356mm
10m length
Insulated aluminium

In stock

Next day delivery available

£171.99

Insulated aluminium flexible ducting by Systemair, 315mm diameter, 10m length, shown rolled out with insulation visible.

Insulated aluminium flexible ducting by Systemair, 315mm diameter, 10m length, shown rolled out with insulation visible.

In stock

Next day delivery
available

Systemair

Flexible Ducting Insulated Aluminium 315mm x 10m Length

315mm
10m length
Insulated aluminium

In stock

Next day delivery available

£250.99

Flexible insulated aluminium ducting from Systemair, 305mm diameter and 10m length, shown coiled and ready for installation.

Flexible insulated aluminium ducting from Systemair, 305mm diameter and 10m length, shown coiled and ready for installation.

In stock

Next day delivery
available

Systemair

Flexible Ducting Insulated Aluminium 305mm x 10m Length

305mm
10m length
Insulated aluminium

In stock

Next day delivery available

£135.99

Insulated aluminium flexible ducting from Systemair, 254mm diameter and 10m length, showing shiny metallic surface and flexible structure.

Insulated aluminium flexible ducting from Systemair, 254mm diameter and 10m length, showing shiny metallic surface and flexible structure.

In stock

Next day delivery
available

Systemair

Flexible Ducting Insulated Aluminium 254mm x 10m Length

254mm
10m length
Insulated aluminium

In stock

Next day delivery available

£119.99

Flexible insulated aluminium ducting from Systemair, 229mm diameter and 10m length, shown coiled with reflective aluminium surface.

Flexible insulated aluminium ducting from Systemair, 229mm diameter and 10m length, shown coiled with reflective aluminium surface.

In stock

Next day delivery
available

Systemair

Flexible Ducting Insulated Aluminium 229mm x 10m Length

229mm
10m length
Insulated aluminium

In stock

Next day delivery available

£102.99

Flexible insulated ducting in 100mm diameter and 10m length, designed for efficient air ventilation by eFans.

Flexible insulated ducting in 100mm diameter and 10m length, designed for efficient air ventilation by eFans.

In stock

Next day delivery
available

eFans SKU: EFFDI204

Flexible Ducting Insulated 204mm x 10m Length

204mm
10m length
Insulated aluminium

In stock

Next day delivery available

£76.99