We are the Authorised Grant Service Agents in Cornwall

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 

With 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 is the market leading product 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 2008′

Vortex Pro Internal Combi Condensing Range

For 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 2008
  • 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
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1. A £25 deposit is payable to secure your preferred date and time slot. ( This will be deducted from the final bill at the engineers visit) 2. If no deposit is paid at the time of making the booking, the booking will not be confirmed. You will receive an email that the booking has been cancelled shortly after making it 3. The 10% discount offered applies only to our current service or repair charges. i.e If making a service visit, the current cost is £69 plus vat. So you will receive a £6.90 discount off of the total invoice. (Please see the " our prices" page on the website, for our current service or repair charges) 4. All final invoices need to be paid on completion of the job at the engineers visit. If paying by bank transfer, these need to be made the same day. All credit card payments carry a 1.95% merchant handling fee that will be added to the invoice total. A cheque or cash can also be used to make payment 5. Your date and time will be confirmed via email once we receive the £25 deposit, and unless we call you, we will attend on the specified date and time you have chosen 100% guaranteed 6. The deposit is non refundable, but the date and time can be changed by you,if given 48hrs notice via email or by telephone. All emails will be responded to within 24 hours and any voice-mail messages left will be responded to within 4 hours 7. If the calendar is showing fully booked and your job is fairly urgent i.e a Breakdown/repair visit. Please do not hesitate to call or email us direct, as we can normally fit more calls in, even when the calendar day is showing " booked"

SOS Ltd - South West Oil Specialists