Authorised & accredited Grant boiler service & installation Agents in Cornwall

Grant UKWith an established history of over 30 years designing, manufacturing and supplying a wide range of highly efficient and reliable products, Grant has become a firm favourite for many people when choosing a new or replacement oil-fired boiler.   Today, Grant’s range of Vortex oil-fired condensing boilers tops the Government SEDBUK Efficiency Database and are some of the market leading products in this sector.

A new approach to oil-fired heating

The name ‘Grant’ has in recent years become synonymous with highly efficient oil-fired central heating appliances.

Designs like the ‘Multi Pass’ boiler achieved efficiency levels far in excess of any UK or European Standards and have helped thousands of homes to reduce their annual fuel bills. So it will come as no surprise to see Grant yet again leading the way with the Grant Vortex oil-fired condensing boiler range.

Despite the sophisticated technology employed in the development of new products, Grant’s design engineers have kept true to the original Grant concept of simplicity in installation and maintenance which are essential ingredients of today’s heating systems. Grant products are manufactured from the highest quality materials and designed not just to meet, but to exceed all relevant performance and environmental standards.

Voted ‘Which Best Buy 2017-2019

Grant Vortex Oil Boiler external viewFor almost two years Grant has been working behind the scenes on brand new electronic versions of the successful Grant Vortex Combi Range with the aim of incorporating as many of the additional features and benefits customers have requested, whilst bringing the technology installed in these appliances up to the minute. The new models now include internal frost protection, neon diagnostic indicators and a factory fitted internal condensate trap (this can be sited externally if preferred), which is designed to make installation and servicing easier.

The Grant Vortex Pro Internal Electronic Condensing Combi’s
are available in three sizes :-  21kW, 26kW and 36kW.

Unique Design

Grant Vortex Pro Combi’s feature much larger plate heat exchangers which due to their low water content and larger surface area, vastly increase the hot water performance available. Mixing valves are pre-set at 50°C, controlling accurately the hot water draw off temperature from the boiler. They also feature a low system pressure cut off switch, enabling the combi to protect itself in the unlikely event of system water loss. Additionally, there are two very accurate electronic temperature controls which allow the boiler to operate in condensing mode on central heating, whilst maintaining its instant hot water production.


  • Voted Which? Best Buy Boiler 2017, 2018, 2019
  • All white cased Grant Vortex Pro Combi models are suitable for kitchen or utility room installations
  • Internal condensate trap
  • Neon diagnostic indicators
  • Simple and quick to install with no complicated wiring or plumbing
  • Whisper quiet operation
  • Unique Grant Vortex stainless steel heat exchanger
  • Extremely compact design
  • Fitted with low Nox Riello burner
  • 5 year guarantee on boiler heat exchanger

SOS Heating Ltd, are Cornwall’s accredited installers & service engineers for Grant UK

Grant run a vortex oil scheme for installers loyal to buying and installing their products correctly. We have now been accredited by Grant UK themselves, which enables us to give our clients a full 7 year parts and labour warranty, with nothing to pay other than having their boiler serviced, annually by us, to comply to the warranty.

We also complete the first year boiler service, free of charge, making an installation by us an excellent deal. We believe this 7 year parts and labour warranty gives us the advantage over the competition, many of whom can only offer 2 years warranty, as is Grants standard.

Grant run a G-ONE scheme for installers loyal to buying their products, which SOS Heating have now been accredited by them and added to.

This enables us to give our customers a full…

  • 7 year parts and labour warranty,
  • Nothing to pay other than having their boiler serviced once a year to comply by the warranty.
  • We also offer them their first boiler service free of charge on top of this making this a good deal.

If your new Grant boiler develops a fault in its first two years,
(7 years if installed by us), call us to repair it free of charge and we will do the rest.