A fully modulating boiler adjusts its output to match the heat your home needs at that moment, instead of switching on and off at full power. It runs steadily at lower output for longer, which uses less fuel and reduces wear from constant cycling.

Independent test house data confirms a 15% fuel saving compared with other modern condensing oil boilers in its class. Actual savings depend on the property, the heating system and how it is used.

The stainless steel heat exchanger is guaranteed for 25 years and non-serviceable parts for 5 years from installation. The guarantee depends on the boiler being registered with us within 30 days of installation and serviced every 12 months.

Yes. The Sapphire runs on kerosene and can be converted to HVO (hydrotreated vegetable oil), a renewable liquid fuel that cuts heating carbon emissions.

The Sapphire is OpenTherm certified, so it works with OpenTherm controls such as Honeywell evohome and EPH. We recommend EPH CP4 series controls.

The Sapphire comes in three outputs, 6 to 23 kW, 6 to 28 kW and 6 to 32 kW, in internal and external versions, as a heat-only boiler or a combi boiler.

The Sapphire is ErP class A, with 92% seasonal space heating efficiency and 97.51% useful efficiency at 30% load. It has a 316Ti stainless steel heat exchanger and low NOx emissions of 65 mg/kWh.

Yes. Sapphire makes MCS certified R290 air source heat pumps from 6 to 27 kW for domestic, commercial and industrial buildings.

Call us on 01480 477066 or email sales@sapphireboilers.co.uk and we will help you find a trained installer. Installers can book free Sapphire training at our St Neots training centre.