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Grant Vortex External

5 Year guarantee*

Grant Vortex External

A high efficiency condensing range of free standing external oil-fired boilers designed for situations where internal space is at a premium. This range of outdoor condensing oil boilers features the award winning unique Grant Vortex heat exchanger and have some of the highest efficiencies available in the market today.

a Heating

Features & benefits

Installation & commissioning

Installation must comply with the current Building Regulations. As with all oil-fired appliances, Grant condensing boilers require commissioning at the time of installation. This simple process ensures that the boiler is working at peak efficiency which, in turn, will result in lower running costs and long term reliability. Annual maintenance is also made easy by Grant’s cleverly designed front service access to both burner and all the internal serviceable parts. This feature enables Grant Condensing Boilers to be fitted neatly and unobtrusively within either the kitchen, boiler house, or utility room environment. Comprehensive technical information can be found in the installation manual.

  • High efficiency SEAI HARP ‘A’ Rating
  • Features a Riello RDB Burner
  • 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 2°C
  • Fully approved to OFTEC Standard and EC directives
  • *One year manufacturer's warranty with five year guarantee on boiler heat exchanger (T&Cs Apply)


Product code
Energy Label
Product Fiche
Set Output
Max Output
NOx Emissions
Energy Rating
Load Profile
VORTMOD1521 Grant Vortex External 15-21 View - 21kW 21kW 115kg 879mm 734mm 385mm 93 Compliant a Heating -
VORTMOD1526 Grant Vortex External 15-26 View - 21kW 26kW 152kg 908mm 800mm 505mm 95 Compliant a Heating -
VORTMOD2636 Grant Vortex External 26-36 View - 31kW 36kW 169kg 908mm 800mm 505mm 97 Compliant a Heating -
VORTMOD3646 Grant Vortex External 36-46 View - 41kW 46kW 169kg 908mm 800mm 505mm 92.6 Compliant a Heating -
VORTMOD4658 Grant Vortex External 46-58 View - 52kW 58kW 295kg 1234mm 945mm 584mm 94.1 Compliant a Heating -
VORTMOD5870 Grant Vortex External 58-70 View - 64kW 70kW 309kg 1234mm 945mm 584mm 93.6 Compliant a Heating -



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