Navien
Navien Plate Heat Exchanger 30018296B
Plate heat exchanger for Navien NCB combi boilers, transferring heat from the primary circuit to domestic hot water.
At a glance
- Part type: plate heat exchanger
£124.24
£103.53 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
The PLATE HEAT EXCHANGER is a Navien component used in NCB series combi boilers. It transfers heat from the primary heating circuit to the domestic hot water supply, with the two media kept separate by a stack of brazed plates. It is supplied under Navien part number 30018296B.
Signs this part needs replacing
- Domestic hot water runs cooler than the setpoint or fades during a draw-off
- Hot water temperature swings between hot and cold as the tap runs
- Scale or debris build-up on the plate surfaces reducing heat transfer
- Visible weeping or staining around the plate stack or its connections
- Reduced hot water output at the tap while the heating circuit performs normally
Before you order
- Confirm the boiler model matches one of the fitment lines above before ordering
- Check the part number on the existing component against 30018296B
- Inspect the surrounding pipework and seals, as the exchanger is supplied on its own
- Isolate the boiler and drain down before removing the existing exchanger
No specification data held for this part.
| Make | Model / assembly | Reference | Years | Fitment |
|---|---|---|---|---|
| NAVIEN NCB300-37K COMBI - (Serial Number 3734) | — | — | — | |
| NAVIEN NCB300-37K COMBI - (Serial Number 3734) | — | — | — | |
| NAVIEN NCB500-1S+/32K COMBI - (Serial Number 3924) | — | — | — | |
| NAVIEN NCB500-1S+/32K COMBI - (Serial Number 3924) | — | — | — | |
| NAVIEN NCB500-2S/37K COMBI - (Serial Number 3735) | — | — | — | |
| NAVIEN NCB500-2S/37K COMBI - (Serial Number 3735) | — | — | — |
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.
No technical questions yet for this part.
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