High Efficiency Combi Boilers

Glow-worm’s combi boilers are the ideal solution for all your hot water and central heating needs.We’ve all been there: you turn on the shower, leave it running for a while and step in… only to be shocked by a torrent of cold water.Whilst this may be something every household has gone through before, it needn’t happen to you ever again.Glow-worm produces a wide range of heating and energy products, including first-class, high-efficiency combi boilers. *Note: All extended warranties stated are only available, when registered by a Club Energy installer.

Energy Combi Boilers

A-Rated Small Combi Boiler

  • ErP A rated
  • Compact size will fit in kitchen cupboards
  • High efficiency – lower running costs
  • Ultra quiet operation
  • Eligible for up to 15 years of warranty*

Ultimate2 Combi Boiler

High efficiency combi boiler from Glow-worm

  • Leading combi boiler offering outstanding performance
  • A rated for efficiency – helping you to reduce your fuel bills
  • FREE 5 year parts and labour warranty*
  • Extended warranty options available
  • Available in 30kW and 35kW models to suit homes of all sizes

Energy 35 Store

35kW Combi Boiler - Limitless

  • ErP A Rated
  • Instant, Unlimited Hot water
  • Ultra Quiet Operation
  • LPG Compatible
  • Perfect for large properties


Exclusive, great value combi with a 2 year warranty

  • Value for money, high performance combi range
  • A rated for efficiency
  • FREE 2 year warranty* with option to extend*
  • 24kW and 30kW outputs available – making it suitable for homes of all sizes
  • Includes analogue timer and flue


A-Rated combi boiler with 4 years warranty*

  • A-rated boiler for efficiency – helping to lower your running costs
  • 4 years FREE parts and labour warranty*
  • Reliable performance
  • Competitively priced
  • Extended warranty options available*