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Grant Vortex Indoor Combi



IITC CODE Model Outputs:
GCC90 90,000Btu/hr (26kW)
GCC120 123,000Btu/hr (36kW)



A high efficiency condensing range of oil-fired combination boilers designed for cost effective installation and instant hot water production


  • High efficiency SEDBUK ‘A’ Rating
  • Which? Best Buy Boiler 2008
  • Suitable for balanced or conventional flue application
  • Fully approved to OFTEC Standard and EC directives
  • One year manufacturer’s warranty with five year guarantee on boiler heat exchanger
  • Features a Riello RDB Burner
  • Unique drop-down control panel for ease of servicing
  • Fully valved flow, return and cold feed, meaning the appliance can be completely isolated from the system
  • High quality nickel plated internal pipework
  • Whisper quiet operation



Condensing Oil Boilers
EZ Fit Flue Guide
Installer Technical Data