25 Year
Warranty
We offer a 25 year warranty on the heat exchanger, and 5 years on non serviceable parts
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Sapphire Boiler Range
Fully Modulating
Oil Boilers
Our extensive range of oil boilers is designed to meet your home’s heating needs with efficiency and reliability. Available in internal, external, and combination models, our award-winning Sapphire oil-fired condensing boilers offer a dependable solution to keep your home warm.
The Sapphire Boiler is the industry’s first Fully Modulating, OpenTherm Certified Liquid Fuel Boiler on the Market.
Find out why you should heat your home with Sapphire, whilst reducing your carbon footprint along with lower fuel and electricity consumption.
Our boilers are
25 Year
Fully
Modulating
We offer a 25 year warranty on the heat exchanger, and 5 years on non serviceable parts
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OpenTherm
Certified
OpenTherm certified boiler which works seamlessly with Genius Hub, EvoHome controls & EPH
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Low NOx
Emissions
Blue Flame low NOx combustion, exceeding the 2018 ErP Directive. Futureproofed against future regulation changes
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Underfloor
Heating
No minimum return temperature corrosion issues due to stainless steel construction, perfect for underfloor heating systems
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Stainless
Steel
Fully Stainless Steel Heat Exchanger and Flue, with 4 positional point options for Flue connection options
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View full range below
Sapphire Internal
Sapphire Internal boilers are designed to integrate seamlessly into kitchens and utility spaces, delivering an ideal combination of flexibility and performance.
Sapphire External
Sapphire External boilers are engineered to deliver high-efficiency heating where indoor space is limited.
Sapphire Combi Internal
Sapphire Internal Combi boilers are designed for installation within the home, offering an excellent balance of flexibility and performance.
Sapphire Combi External
Sapphire External Combi boilers are designed to deliver high-efficiency heating and hot water for properties where internal space is limited.
FAQs
Yes, the Sapphire has been extensively tested on Kerosene and works perfectly with this fuel.
Yes, the Sapphire has been extensively tested on HVO and works perfectly with this fuel, making this boiler future-proofed.
There should be no reason why HVO cannot be stored in the tank you have, providing it is well maintained.
We recommend that kerosene levels are as low as possible before making the swap, and the tank is cleaned as part of the conversion process.
Modulating control means the heating power is increased or reduced based on the actual output needed, therefore reducing your heating bills by using less fuel and electrical consumption.
OpenTherm is the name given to a form of communication of information between central heating appliances and room thermostats.
Your boiler should be serviced annually by an Approved Sapphire Agent.
Yes, our external model is available.
NOx or Nitrogen are gases that form when fuel is burned at high temperature. The Sapphire exceeds the 2018 ErP Directive NOx emission standard.
This is currently in progress, with a release lined up for 2026.
Refer to the user manual supplied with the boiler to find the fault code. Attempt to reset the boiler. If the fault code appears again, contact your Sapphire Agent.
While you won’t see the true benefit of the boiler, yes it can work on your exisiting controls. There is a wiring option that converts it to a switch live. The boiler will then modulate itself via the water flow temperature.
Please click here to book on to our training course. Once you complete the training, you can then sign up to be an Approved Sapphire Agent.
We offer a 5-year warranty on all non-serviceable parts & an impressive 25-year warranty on the fully stainless steel heat exchanger.
No, both the external & internal models are floor standing.
No, we currently don’t offer these.
The nest controls can be used but as a switch Live option where the boiler will modulate itself via flow temp but if you are wanting to run the boiler via the OpenTherm mode then the nest isn’t compatible unfortunately.
