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Sealed System Boilers - Unvented

The system boiler sometimes known as a “sealed system” provides central heating and hot water via a storage cylinder housed in an airing cupboard - no need for water tanks in the loft, as with a regular heat only boiler.

Energy system boiler

ErP A rated system boiler with FREE 7 year guarantee out of the box

  • High quality aluminium heat exchanger
  • FREE 7 year guarantee out of the box with option to extend*
  • Compact size – fits perfectly in kitchen cupboards
  • ErP A rated for efficiency - helping to reduce energy bills
  • High Efficiency modulating Grundfos pump

Ultimate₃ system boiler

Exclusive system boiler with 5 years guarantee*

  • ErP A rated for efficiency - helping to reduce energy bills
  • FREE 5 year guarantee with option to extend*
  • £15 reward when registered through Club Energy
  • Available as 25kW model

Easicom₃ system boiler

Quality and reliable system boiler with 4 years guarantee*

  • Available in 25kW output model
  • Bright, LCD display with easy-to-use interface
  • Leading system boiler offering great performance
  • FREE 4 year guarantee*