Oil Boilers Tel: 0113 282 0202 - Email: info@kwh-heating.co.uk

Pay monthly option available
if boiler is purchased with installation!

Pay monthly option available
if boiler is purchased with installation!

Internal Regular Boilers

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

Features & Benefits

  • Blue flame and yellow 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
  • PCB controller using highly accurate thermistors with anti-cycling function (outputs up to 35kW)*
  • Patented heat exchanger design
  • Multiple tapping points for ease of installation
  • Front service access
  • Multi-directional flue options
  • High-performance MHG
  • / Riello RDB BLU**/Riello RDB burner complete with full diagnostic control box

Blue Supreme models only
**Enviroblue models up to 35kW output

Internal Regular Boiler 12-20KW

  • Product Code: Internal Regular Boiler 12-20KW
  • Availability: In Stock
  • £1,529.00


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  • Worcester Boiler up to 10 year guarantee

    Worcester Boiler up to 10 year guarantee

  • Free site survey

    Free site survey

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    Finance solutions

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    Which approved supplier

  • Quality service – family business

    Quality service – family business

  • Competent team

    Competent team

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