Potterton
Potterton Duo Exchanger 5142343
Potterton Commercial duo exchanger, part 5142343, for Sirius 2 FS90, Sirius 2 FS110 and Sirius 3 FS90 boilers.
£3,301.20
£2,751.00 ex. VAT · VAT at 20%
Same-day dispatch
Ordered by 4pm Mon–Fri, 10:30am Sat.
30-day returns
Unused, in original packaging.
What it is
This is the duo exchanger listed by Potterton Commercial under the name DUO EXCHANGER (FS90), part number 5142343. It is a heat exchanger assembly intended for Potterton Commercial Sirius boilers, where it transfers heat from the combustion side into the appliance water circuit. It is a service component for commercial boiler plant rather than a domestic consumable.
Signs this part needs replacing
- Water weeping or staining around the exchanger body, joints or sealing faces
- Falling heating output or poor heat transfer to the appliance water circuit
- Kettling, banging or rumbling noises from the exchanger during firing
- Repeated overheat lockouts or high limit trips linked to restricted waterways
- Visible corrosion, scale build-up or distortion on the exchanger surfaces
Before you order
- Confirm the appliance model against the fitment list, as the same part number does not cover every Sirius variant
- Check the data badge on the boiler and cross-reference the manufacturer part number 5142343
- Assess whether the associated seals, gaskets and fittings can be reused before the exchanger is removed
- Confirm access and handling arrangements, as this is a heavy commercial component
No specification data held for this part.
| Make | Model / assembly | Reference | Years | Fitment |
|---|---|---|---|---|
| POTTERTON COMMERCIAL POTTERTON COMMERCIAL SPARES | — | — | — | |
| POTTERTON COMMERCIAL SIRIUS 2 FS110 | — | — | — | |
| POTTERTON COMMERCIAL SIRIUS 2 FS90 | — | — | — | |
| POTTERTON COMMERCIAL SIRIUS 3 FS90 | — | — | — |
Documents & drawings
Everything we hold for this part. Where a document exists but we don't hold it, the technical team will source it from the manufacturer — usually the same working day.
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