Plastic Ducting Adaptors

12 products

Plastic duct adaptors join rigid ducting of different sizes or shapes, so a fan, MVHR unit or terminal can connect to the duct it would not otherwise fit. We stock Domus round spigot adaptors that step between 80mm, 100mm, 110mm, 125mm, 150mm and 200mm, round to rectangular adaptors linking 100mm, 125mm and 150mm round duct to 110 x 54mm, 204 x 60mm and 220 x 90mm flat duct, and an in-line adaptor from 220 x 90mm to 204 x 60mm. Use the buttons below to filter by size, or send us the two sizes you need to join: email hello@efans.co.uk or call 0161 399 3825.

Frequently asked questions

What is a ducting adaptor?

An adaptor connects two ducting components of different sizes or shapes, stepping a duct up or down in diameter, or converting round duct to flat rectangular duct, so a fan, MVHR unit or grille can join ducting it would not otherwise fit.

Spigot adaptor or round to rectangular?

Use a round spigot adaptor to change between circular duct sizes, for example 100mm to 125mm. Use a round to rectangular adaptor to connect round duct to a flat duct system, for example 204 x 60mm flat duct to 125mm round. Match the two sizes you are joining.

How do the size buttons work?

Each adaptor is listed under both of its sizes, so selecting 125mm shows every adaptor with a 125mm end. Pick one of the two sizes you are joining, then choose the adaptor with the other size you need.

Will stepping down a size affect airflow?

Reducing the duct size adds resistance, so keep reduced sections as short as possible, for example only at the fan or terminal connection. Where possible run the main duct at the larger size.

80mm 100mm 110mm 125mm 150mm 200mm 110 x 54mm 204 x 60mm 220 x 90mm