Grant Vortex Eco External System Boiler - 16-21kW Oil

The 16-21kW output is generally suitable for small to medium-sized homes. For a 5-bedroom house, a higher output boiler might be necessary depending on insulation levels and hot water demands. It's best to consult a heating engineer for a proper heat loss calculation.

No, this model is specifically designed as an 'External Wall Hung System' boiler and must be installed outdoors.

The Grant Vortex Eco External boiler is SEDBUK A-rated, achieving an efficiency of 90.52%.

Grant boilers typically come with a manufacturer's warranty, often requiring registration and annual servicing by an approved engineer. Please refer to the product documentation or Grant's official website for specific warranty terms and conditions.

For optimal performance, safety, and to maintain warranty compliance, annual servicing by a qualified engineer is recommended.

This boiler is designed to run on standard domestic kerosene heating oil.

As a system boiler, it heats water stored in a hot water cylinder. While not instant like a combi boiler, it is designed to provide a high volume of hot water suitable for multiple taps running simultaneously, depending on cylinder size.

Check the oil supply level and ensure the isolation valve is open. Verify that the electricity supply is on. If the issue persists, contact a qualified engineer.

Ensure radiators are bled and system pressure is adequate. Check for any blockages in the system filters. An annual service may be required.

This could indicate an issue with the thermocouple or gas supply. Do not attempt to fix this yourself; contact a qualified heating engineer.

These could signal air in the system or a component issue. Bleed radiators and check system pressure. Persistent noise requires professional inspection.

Consult the boiler's manual for the specific error code and recommended actions. Many codes indicate a need for professional diagnosis.