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 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.

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.

Is there a combi version available?

This is currently in progress, with a release lined up for 2025

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.

Does Sapphire work with my existing controls?

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.

How can I start installing these boilers?

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.

What warranty do you offer?

We offer a 5-year warranty on all non-serviceable parts & an impressive 25-year warranty on the fully stainless steel heat exchanger

Can your boiler be wall mounted?

No, both the external & internal models are floor standing

Where can I find a Sapphire Agent?

Please click here to view our Map of Agents

Do you supply flue liners?

No, we currently don’t offer these

Are Nest Controls Compatible with your boiler?

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.