Navien
Navien Exhaust Duct Packing 20018454A
Exhaust duct packing for Navien LCB 700 combi, regular and system boilers, supplied as part 20018454A.
At a glance
- Appliance family: LCB 700
£3.91
£3.26 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 exhaust duct packing is a sealing component used on Navien LCB 700 series boilers. It sits at the exhaust duct connection, where it seals the joint between the flue duct and the appliance to keep flue gases and condensate contained. It is manufactured by Navien and identified by part number 20018454A.
Signs this part needs replacing
- Visible cracking, hardening or flattening of the packing at the exhaust duct joint
- Condensate weeping or staining around the flue connection
- Flue gas odour or draughts detected at the duct joint
- Combustion readings drifting outside expected limits on service
- The packing is disturbed or damaged during flue work and cannot be reused
Before you order
- Confirm the boiler model and serial number against the fitment list above
- Check the exhaust duct joint on the appliance to confirm the packing is the component required
- Inspect the flue assembly for any other damaged seals or gaskets that may also need attention
- Verify the part number 20018454A matches the number on the existing component or the manufacturer's parts list
No specification data held for this part.
| Make | Model / assembly | Reference | Years | Fitment |
|---|---|---|---|---|
| NAVIEN LCB 700 COMBI EXTERNAL 21KW (Serial Number 1705) | — | — | — | |
| NAVIEN LCB 700 COMBI EXTERNAL 21KW (Serial Number 1705) | — | — | — | |
| NAVIEN LCB 700 COMBI EXTERNAL 28KW (Serial Number 1710) | — | — | — | |
| NAVIEN LCB 700 COMBI EXTERNAL 28KW (Serial Number 1710) | — | — | — | |
| NAVIEN LCB 700 COMBI EXTERNAL 36KW (Serial Number 1709) | — | — | — | |
| NAVIEN LCB 700 COMBI EXTERNAL 36KW (Serial Number 1709) | — | — | — | |
| NAVIEN LCB 700 COMBI INTERNAL 21KW (Serial Number 1704) | — | — | — | |
| NAVIEN LCB 700 COMBI INTERNAL 21KW (Serial Number 1704) | — | — | — | |
| NAVIEN LCB 700 COMBI INTERNAL 28KW (Serial Number 1706) | — | — | — | |
| NAVIEN LCB 700 COMBI INTERNAL 28KW (Serial Number 1706) | — | — | — |
Showing 10 of 36 compatible appliances.
Documents & drawings
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