What duct types is the AD857041 adapter duct suitable for?

It is suitable for flat duct and flat duct flex, and for round duct when used with a pipe connector, as well as aluflex pipe.

How is the adapter duct connected during installation?

The adapter duct is easy to connect via the flat duct connecting piece.

What is the connection size of the AD857041?

The adapter duct has a Ø 150 mm connection in a round–flat configuration.

Is the AD857041 aerodynamically optimised?

Yes, it is aerodynamically optimised for minimised pressure losses and maximised flow rate.

Which safety and material standards does this adapter duct comply with?

It complies with the Needle Flame Test (IEC 60695–11–5), the V2 flammability class (UL94) and the B1 building material class (DIN 4102–1).

Product Information Sheet

Gaggenau Adaptator Flat/Round Ø150mm

SKU: AD857041

Woodalls 1053–1055 Finchley Road, London, NW11 7ES
+44 (0)208 455 3925 · [email protected] · www.woodalls.co.uk

Mon–Fri: 9:00am – 5:00pm | Sat–Sun: Closed

Printed 19 July 2026

Gaggenau AD857041 Adaptator Flat/Round Ø150mm

SKU: AD857041

Black Plastic B1

The AD857041 adapter duct is a round–flat ducting component with a Ø 150 mm connection. It is suitable for flat duct and flat duct flex, as well as round duct with a pipe connector and aluflex pipe. Designed for easy connection via a flat duct connecting piece, it is aerodynamically optimised to minimise pressure losses and maximise flow rate, while complying with recognised flame and building material safety classifications.

5 Year Warranty

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This Product Page

Product name	Adapter duct
Model code	AD857041
Duct type	Round–flat
Connection diameter	Ø 150 mm
Suitable duct types	Flat duct, flat duct flex, round duct (with pipe connector), aluflex pipe
Connection method	Easy to connect via the flat duct connecting piece
Aerodynamic design	Optimised for minimised pressure losses and maximised flow rate
Needle Flame Test compliance	IEC 60695–11–5
Flammability class	V2 (according to UL94)
Building material class	B1 (DIN 4102–1)
Dimensions	Not stated in source
Material	Not stated in source

Delivery & Returns

Delivery

Free delivery to London addresses to ground floor only (service lift access accepted). Some appliances carry standard manufacturer delivery charges — confirmed at time of quotation. UK mainland delivery available for an additional charge. Lead times vary by make, model, and manufacturer availability.

Installation

We do not install appliances. We can recommend vetted fitters operating within London — payments are made directly with the fitter. Woodalls accepts no responsibility for installation work carried out by any third party.

Returns

14-day return window from the day after delivery. Items must be unused, uninstalled, and in original packaging. View our full returns policy →

Authorised Dealer

All products are supplied as an authorised Gaggenau dealer, with full manufacturer warranty. Established 1967.

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Gaggenau Adaptator Flat/Round Ø150mm

Gaggenau AD857041 Adaptator Flat/Round Ø150mm

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