Products

Oil Boilers

Award winning Grant Vortex condensing boiler range, available in outputs from 12-70kW. Endorsed by the Energy Savings Trust, the appliances are currently some of the most efficient oil-fired boilers on the market.

Vortex Blue: Internal

Vortex Blue: Internal

  • Award winning range
  • Outputs of 15-21, 21-26 and 26-36kW
  • 90.8 - 94.56% Space heating efficiency
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Vortex Pro: Internal

Vortex Pro: Internal

  • Award winning range
  • Outputs ranging from 15-70kW
  • 90.8 - 94.56 Space heating efficiency
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Vortex Blue: External

Vortex Blue: External

  • Award winning range
  • Outputs of 15-21, 21-26 and 26-36kW
  • 90.7- 93.3% Gross SAP2009 annual efficiency
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Vortex Pro: External

Vortex Pro: External

  • Award winning range
  • Outputs ranging from 15-70kW
  • 90.8 - 94.56% Space heating efficiency
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Vortex Blue: Internal Combi

Vortex Blue: Internal Combi

  • Award winning range
  • Outputs of 21, 26 and 36kW
  • 90.8 - 94.56% Space heating efficiency
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Vortex Pro: Internal Combi

Vortex Pro: Internal Combi

  • Award winning range
  • Outputs of 21, 26 and 36kW
  • 90.8 - 94.56% Space heating efficiency
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Vortex Blue: External Combi

Vortex Blue: External Combi

  • Award winning range
  • Outputs of 21, 26 and 36kW
  • 90.8 - 94.56% Space heating efficiency
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Vortex Pro: External Combi

Vortex Pro: External Combi

  • Award winning range
  • Outputs of 21, 26 and 36kW
  • 90.8 - 94.56% Space heating efficiency
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Vortex Boiler House

Vortex Boiler House

  • Award winning product range
  • Outputs ranging from 15–70kW
  • 90.06 – 92.7% Space heating efficiency
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Vortex Eco: Internal Wall Hung

Vortex Eco: Internal Wall Hung

  • Award winning range
  • Outputs ranging from 12–21kW
  • 90.13 – 90.52% Space heating efficiency
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Vortex Eco: External Wall Hung

Vortex Eco: External Wall Hung

  • Award winning range
  • Outputs ranging from 12–21kW
  • 90.13 – 90.52% Space heating efficiency
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Vortex Eco: Internal

Vortex Eco: Internal

  • Award winning range
  • Outputs ranging from 15–35kW
  • 91.7 – 92.4% Space heating efficiency
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Vortex Eco: External

Vortex Eco: External

  • Award winning range
  • Outputs ranging from 15–35kW
  • 91.7 – 92.4% Space heating efficiency
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Why upgrade to a Grant oil-fired boiler?

For the past 40 years Grant has developed some of the most innovative and efficient oil-fired boilers in the UK and Ireland.  Utilising our patented Vortex stainless steel secondary heat exchanger, Grant boilers are designed and manufactured to the highest standards so you can be confident in their durability and efficiency.  We believe in simplicity, and while our technology is advanced, our boilers are low maintenance and easy to install. And with over 60 models and hundreds of different EZ-Fit flue combinations there's sure to be a solution that's right for you.

What is a condensing boiler and why is it more efficient?
A condensing boiler has second (condensing) heat exchanger where the flue gases are cooled to below their dew point by the water returning from the heating system. This has the effect of condensing the water vapour present in the flue gases, and liberating the heat energy that would otherwise be lost to outside through the flue system.
What is the difference between a Vortex Pro and Vortex Eco boiler?
The Award Winning Vortex boiler was launched in 2002, in the subsequent years that followed there was a customer demand for a competitively priced ‘A’ rated boiler, the design team at Grant devised the Eco range to meet this growing demand. The Vortex Pro has a larger heat exchanger area and more case insulation which gives it a slightly higher efficiency than the equivalent Eco model.
What is the difference between a Vortex and VortexBlue boiler?
Grant Vortex boilers use a burner which produces a yellow flame. The VortexBlue boiler uses a newer blue flame burner that is designed to re-circulate the combustion gases. Within the blue flame burner’s specially designed change to the combustion head, the combustion gases are mixed with atomised droplets of fuel and fresh air drawn in through the burner. This produces a clean blue flame (hence the technology’s name) with those important low NOx emissions.

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