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Grant Vortex condensing outdoor boiler modules. A high efficiency condensing range of free standing external oil-fired boilers
designed for situations where internal space is at a premium.

The External Modules range feature the ‘award winning’ unique Grant Vortex heat exchanger and have some of the highest efficiencies available on the market today.

  • High efficiency SEDBUK ‘A’ Rating
  • Features a Riello RDB Burner
  • Whisper quiet operation
  • Optional pipe entry points
  • Comes complete with a factory fitted multi-directional flue
  • Optional side or rear flue exits
  • Includes a factory fitted frost stat preset to 5°C
  • Fully approved to OFTEC Standard and EC directives
  • One year manufacturer’s warranty with five year guarantee on boiler heat exchanger


Available in outputs of;

15-21kW (50-70,000Btu/hr)
15-26kW (50-90,000Btu/hr)
26-36kW (90-120,000Btu/hr)
36-46kW (120-155,000Btu/hr)
46-58kW (155-200,000Btu/hr)
58-70kW (200-240,000Btu/hr)

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