Internal System Boilers

Internal System Boilers

Internal System Boilers

The Firebird Envirogreen range of internal System Boilers is manufactured with a high-quality, aesthetically pleasing finish that doesn’t look out of place in a kitchen or utility room.

Features & Benefits

  • Low NOx and Blue Flame options available
  • Compact design – fits under standard kitchen worktop (outputs up to 35kW)
  • Fully insulated and acoustically designed for ultra-quiet operation
  • Durable casings with a high-quality finish
  • Patented heat exchanger design
  • Front service access
  • Factory-fitted expansion vessel and circulating pump
  • Low pressure switch protects boiler in the unlikely event of system water loss
  • PCB controller using highly accurate thermistors with anti-cycling function (outputs up to 35kW)
  • High-performance Low NOx and Blue Flame burners complete with full diagnostic control box
  • Multi-directional flue options
  • Models available in outputs of 20kW to 44kW

Internal System Boilers

Product Range

Envirogreen™ System

ERP Rating


View Product Details

Detailed product information for Internal System Boilers.

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Boiler Handbook

The ultimate guide to the Firebird range of oil-fired boilers.

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Firebird oil-fired boilers are covered by a 2-year manufacturers warranty as standard, with extended warranties of up to 10 years available on some ranges. For further information, please contact us.

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