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

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.