Flat-to-Round Transformers
Flat-to-round transformers (adaptors) connect low-profile flat channel plastic ducting to round spigots and round plastic ducting. Since almost every extractor fan and cooker hood has a circular outlet, a transformer is usually the first fitting in any flat channel run — and often the last, where the duct meets a round wall or roof terminal.
We stock both straight and angled (90°) transformers. The angled version turns the connection through a right angle in one compact fitting — perfect for coming straight off the top of a cooker hood into flat duct above the wall units.
- 110×54mm flat to 100mm round — straight and angled
- 204×60mm flat to 100mm, 125mm or 150mm round — angled, plus straight to 125mm
- 220×90mm flat to 125mm or 150mm round — angled, plus straight to 150mm
Push-fit the transformer to your fan spigot, seal, and continue the run in flat channel. Stocked items ordered before 3pm are dispatched for next-day delivery, with free UK mainland delivery on orders over £400 ex VAT.
Showing all 9 results
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Flat Plastic Ducting to Round Angled Transformer 110×54 – 100mm
£3.29 + VAT Add to basket -
Flat Plastic Ducting to Round Angled Transformer 204×60 – 100mm
£7.76 + VAT Add to basket -
Flat Plastic Ducting to Round Angled Transformer 204×60 – 125mm
£7.76 + VAT Add to basket -
Flat Plastic Ducting to Round Angled Transformer 204×60 – 150mm
£7.76 + VAT Add to basket -
Flat Plastic Ducting to Round Angled Transformer 220×90 – 125mm
£9.85 + VAT Add to basket -
Flat Plastic Ducting to Round Angled Transformer 220×90 – 150mm
£10.01 + VAT Add to basket -
Flat Plastic Ducting to Round Transformer 110×54 – 100mm
£3.92 + VAT Add to basket -
Flat Plastic Ducting to Round Transformer 204×60 – 125mm
£7.60 + VAT Add to basket -
Flat Plastic Ducting to Round Transformer 220×90 – 150mm
£8.16 + VAT Add to basket