Vanguard L - 4000

Vanguard L boilers are designed with a large combustion chamber positioned in the lower part of the heat exchanger, the Vanguard L range ensures maximum heat transfer efficiency (up to 92% net). The Vanguard L range is capable of an impressive output to size ratio.

Vanguard L Pressure Jet Boiler Ensures Maximum Heat Transfer Efficiency


  • 1 year parts and labour warranty
  • Easy to install and service
  • Single phase or 3 phase
  • Natural gas, oil fired or dual fuel
  • Steel shell construction
  • One or two stage operation
  • High efficiency 92% net (83% gross)
  • Reverse flame combination chamber design
  • 6 bar pressure as standard
  • Supplied complete - not sectional
  • Wide range of outputs
  • Floor Standing
    Floor Standing
  • 1 Year Warranty
    1 Year Warranty


Vanguard L 4000

Output4000 kW
Height2090 mm
Width1970 mm
Depth4279 mm
Flow/Return Connection (BSP)DN250
Maximum Working Pressure6 bar
Water Content4455 Litre
Approx Dry Weight7500 Kg
Boiler Clearances - Front4279 min mm
Boiler Clearances - Back1000 mm
Boiler Clearances - Side1000 mm
Boiler Clearances - Left600 mm
Boiler Clearances - Right600 mm
Seasonal Efficiency91.51 %


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Brochures Expand/Close
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Technical Information
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Vanguard L 420-630kW Spec Sheet.pdf
Vanguard L 760-2650kW Spec Sheet.pdf
Vanguard L 3000-4000kW Spec Sheet.pdf
Vanguard L 4500-7000kW Spec Sheet.pdf
Installation and user guides
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Vanguard L 340 - 7000kW Installation Guide.pdf
Vanguard L 340 - 7000kW User Guide.pdf
Vanguard L User Guide 159663-4.pdf
Vanguard L Installation & Servicing 159662-8.pdf