Split your diesel heater's warm air output to two zones — or step down from 90mm main ducting to 75mm or 60mm outlets — with this genuine AUTOTERM Y Piece Duct Adaptor.

The adaptor arrives with oversized outlets that you simply trim to the diameter you need. One fitting covers all three common duct sizes, so you can route heat to the front and rear of your van, push warm air into a cab-over sleeping area, or adapt your main run to smaller secondary outlets — without hunting for multiple fittings.

Key Features

Genuine AUTOTERM accessory — built to match AUTOTERM and Planar heater systems
Trimmable outlets accommodate 90mm, 75mm, and 60mm ducting
Splits one heater outlet into two runs for multi-zone heat distribution
Durable high-temperature construction
Straightforward push-fit installation


Compatible Duct Sizes

90mm (main inlet)
75mm (trim outlet to suit)
60mm (trim outlet to suit)


Ideal For

Campervans and motorhomes
Caravans
Boats and marine installations
Off-grid cabins and commercial vehicles
Any custom diesel heater ducting layout


FAQ
Does it work with other diesel heater brands?
Yes. The standard duct sizes (60mm, 75mm, 90mm) are used across most aftermarket and OEM diesel air heaters, so this adaptor fits Eberspächer, Webasto, and Chinese-brand heaters as well as AUTOTERM/Planar units.
Do I need to trim the outlets?
Only if you are connecting to 75mm or 60mm ducting. For 90mm connections, no trimming is needed.