Frequently asked questions

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Does the Sapphire work on Kerosene?

Yes, the Sapphire has been extensively tested on Kerosene and works perfectly with this fuel.

Does the Sapphire work on HVO?

Yes, the Sapphire has been extensively tested on HVO and works perfectly with this fuel, making this boiler futureproofed.

Can HVO be used in my existing tank?

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.

What does modulating mean?

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.

What is NOx?

NOx or Nitrogen are gases that form when fuel is burned at high temperature. The Sapphire exceeds the 2018 ErP Directive NOx emission standard.

What is OpenTherm?

OpenTherm is the name given to a form of communication of information between central heating appliances and room thermostats.

How often should my boiler be serviced?

Your boiler should be serviced annually by an Approved Sapphire Agent.

Is there an external model available?

Yes, our external model is available.

Is there a combi version available?

This is currently in progress, with a release lined up for 2024

My Boiler has locked out, what should I do?

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.