Our website uses cookies to help provide you with the best experience tailored to your interests. To use the website with full comfort, please accept to receive all cookies on our website. For more information with regard to Cookies please see our Privacy policy.

Accept Decline

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 guarantees 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
  • Quiet Mark approved
  • FREE 7 year guarantee out of the box with option to extend*

Ultimate₃ 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 guarantee*
  • Extended guarantee options available*
  • Available in a 25kW model

Easicom₃ system boilers

Quality, reliability, choice

  • 4 years FREE parts and labour guarantee*
  • 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