Grant Vortex Pro External 21kW Oil Combi Boiler with Flue VTXOMCOMBI21

The Grant Vortex Pro External Combi 21 (VTXOMCOMBI21) is a robust outdoor oil combi boiler delivering 21 kW of heating and hot water from a factory fitted multi-directional flue. Designed for installations with limited internal space, it features a durable powder-coated external casing, built-in frost stat, factory fitted internal condensate trap and a 24 litre expansion vessel supplied as standard. The boiler uses Grant stainless steel heat exchangers with a Riello RDB low NOx burner, achieves a space heating efficiency of 90.81% and meets Class 2 NOx emissions. User-friendly neon diagnostic indicators simplify operation, and a 10 year guarantee is available when installed by a G1 installer. Suitable for external installations requiring reliable heating and hot water, and compatible with certain biofuel blends depending on type and percentage.