Navien
Navien Air Nozzle 20043451A
Air nozzle D25 for Navien LCB 700 series boilers, part number 20043451A.
At a glance
- Part type: Air nozzle
£6.31
£5.26 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 Navien air nozzle D25 is a component used in the LCB 700 series of boilers. It forms part of the air supply system, helping to regulate airflow for combustion. This part is identified by the manufacturer part number 20043451A.
Signs this part needs replacing
- Combustion instability or flame failure.
- Whistling or unusual noise from the air intake.
- Error codes relating to air supply or combustion.
- Visible damage, blockage or wear on the nozzle.
- Reduced boiler efficiency or intermittent operation.
Before you order
- Confirm your boiler model matches one of the LCB 700 variants listed.
- Check the existing part number is 20043451A.
- Inspect the air nozzle for damage or blockage before ordering.
- Verify the D25 designation is correct for your appliance.
No specification data held for this part.
| Make | Model / assembly | Reference | Years | Fitment |
|---|---|---|---|---|
| NAVIEN LCB 700 COMBI EXTERNAL 36KW (Serial Number 1709) | — | — | — | |
| NAVIEN LCB 700 COMBI EXTERNAL 36KW (Serial Number 1709) | — | — | — | |
| NAVIEN LCB 700 COMBI INTERNAL 36KW (Serial Number 1708) | — | — | — | |
| NAVIEN LCB 700 COMBI INTERNAL 36KW (Serial Number 1708) | — | — | — | |
| NAVIEN LCB 700 REGULAR EXTERNAL 36KW (Serial Number 1482) | — | — | — | |
| NAVIEN LCB 700 REGULAR EXTERNAL 36KW (Serial Number 1482) | — | — | — | |
| NAVIEN LCB 700 REGULAR INTERNAL 36KW (Serial Number 1481) | — | — | — | |
| NAVIEN LCB 700 REGULAR INTERNAL 36KW (Serial Number 1481) | — | — | — | |
| NAVIEN LCB 700 SYSTEM EXTERNAL 36KW (Serial Number 1480) | — | — | — | |
| NAVIEN LCB 700 SYSTEM EXTERNAL 36KW (Serial Number 1480) | — | — | — |
Showing 10 of 12 compatible appliances.
Documents & drawings
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