Navien
Navien Burner Matt Insulation 20043435A
Burner matt insulation for Navien LCB 700 combi, regular and system boilers, part number 20043435A.
At a glance
- Appliance family: LCB 700
£20.42
£17.02 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 burner matt insulation, part number 20043435A, is a heat-resistant insulating component used in the combustion area of Navien LCB 700 boilers. It sits around the burner to protect adjacent components from heat and to help maintain stable combustion conditions. It is listed for the LCB 700 boiler family across combi, regular and system variants.
Signs this part needs replacing
- Cracking, crumbling or brittleness in the insulation material
- Charring or discolouration beyond normal heat marking
- Insulation breaking up or falling away from the burner area
- Soot deposits or an unstable flame at the burner
- Combustion readings drifting outside the expected range
Before you order
- Confirm the appliance is a Navien LCB 700 and note the serial number
- Check whether the boiler is combi, regular or system, and internal or external
- Confirm the output rating, 21KW or 28KW
- Inspect the burner area for any further damaged insulation or seals
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 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) | — | — | — | |
| NAVIEN LCB 700 REGULAR EXTERNAL 21KW (Serial Number 1474) | — | — | — | |
| NAVIEN LCB 700 REGULAR EXTERNAL 21KW (Serial Number 1474) | — | — | — |
Showing 10 of 24 compatible appliances.
Documents & drawings
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