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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. This means 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

ErP A rated compact system boiler

  • Compact size will fit perfectly in kitchen cupboards
  • ErP A rated for efficiency - helping you to reduce your energy bills
  • 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
  • ErP A rated for efficiency – helping you to save money on your energy bills
  • FREE 5 year parts and labour warranty*
  • Extended warranty options available*
  • Available in a 25kW model

Easicom system boilers

Quality, reliability, choice

  • 4 years FREE parts and labour warranty*
  • ErP A rated for efficiency – helping to lower your energy bills
  • Manufactured right here in the UK by Glow-worm, the brand you can trust
  • Exceptionally quiet in operation
  • Competitively priced