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Concord ESi

The Concord ESi is a sectional cast iron boiler, with an atmospheric two stage gas burner and electronic ignition via an ignition burner. The heat output is adjustable to 85% of full the output. The Concord ESi is suitable for natural gas only.

The combustion chamber and draught diverter are designed for use with a hot water central heating system and have a heat output range of 119-380 kW which must be connected to a chimney. The heat exchanger can be supplied assembled, or unassembled for site assembly.

The boiler is supplied with a control panel for one and two stage burner operation. It offers boiler control by two thermostats for high/low operation, indicator lights, overheat safety thermostat and thermometer giving boiler flow temperature.

Gas Atmospheric Concord ESi Boiler, Part of the Concord Product Range, Suitable only for Natural Gas

Features & Benefits

  • High, full and part load efficiencies
  • 1 year parts and labour warranty
  • Site assembly as standard
  • High/Low adjustable operation on all models
  • Robust cast iron heat exchanger
  • Easy to install and service
  • Low return temperature capability


  • Floor Standing
    Floor Standing
  • 1 Year Warranty
    1 Year Warranty

Standard and Optional kits


  • Flue gas thermometer
  • Hours run meter (1 or 2 hours)


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