Sealed System Boilers For Heating and Hot Water

The system boiler, often listed as a ‘sealed system’, provides central heating and hot water via a storage cylinder, meaning that, unlike with a regular boiler, there’s no need for separate water tanks in the loft of your house.These models are a great choice for those who have limited space in their loft, or for those living with a large family who wish to use hot water from multiple sources at once.Glow-worm’s system boilers do not require an expansion tank or feed, freeing up valuable space in your loft and meaning that we can offer a more efficient and cost-saving installation process.*Note: All extended warranties stated are only available, when registered by a Club Energy installer.

Energy System Boilers

A-Rated Compact System Boiler

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

Ultimate2 System Boiler

High efficiency sealed system boiler from Glow-worm

  • Highly reliable system boiler offering outstanding performance
  • A rated for efficiency – helping you to save money on your fuel bills
  • FREE 5 year parts and labour warranty*
  • Extended warranty options available*
  • Available in a 25kW model


Easicom system boiler - quality, reliability, choice

  • 4 years FREE parts and labour warranty, when registered by a Club Energy installer
  • A-rated regular boiler for efficiency – helping to lower your running costs
  • Manufactured in the UK by Glow-worm, the brand you can trust
  • Exceptionally quiet in operation
  • Competitively priced