The Grant Vortex Pro 26kW Internal Combi is a high-performance floor-standing oil boiler engineered to deliver simultaneous space heating and instant domestic hot water. Utilising the latest Riello RDB low NOx burner technology coupled with Grant's patented stainless steel heat exchangers, the appliance achieves exceptional space heating efficiencies ranging from 91.7% to 94.5%. This A-rated internal model is specifically designed for utility room installations, featuring a sleek white powder-coated casing that houses a comprehensive internal component architecture including a 24-litre expansion vessel and a high-efficiency circulating pump.

Operating with a low water content design and expanded surface area, the internal heat exchanger vastly accelerates thermal transfer to ensure immediate and consistent hot water delivery without requiring an external storage cylinder. The system incorporates accurate electronic temperature controls and dedicated heating and hot water selector switches to provide precise environmental management. Neon diagnostic indicators are integrated into the front fascia to facilitate rapid fault identification and streamline annual maintenance procedures for servicing engineers.

Q: Is this boiler suitable for use with alternative liquid fuels?
A: Yes, it is fully compatible with specific biofuel blends depending on the fuel type and exact percentage.

Q: Does the unit require a separate expansion vessel?
A: No, a comprehensive 24-litre expansion vessel is supplied as a standard integrated component.

Q: What type of burner does this appliance utilise?
A: It features a low NOx Riello RDB burner equipped with a straightforward plug-and-socket connection.

Q: Can this model be connected to standard flue systems?
A: The boiler is directly compatible with the highly adaptable Grant EZ-Fit flue system range.