The Grant Vortex Pro External is a heavy-duty oil-fired boiler engineered to deliver significant thermal output for large residential and commercial heating applications. Operating at a substantial 64kW, this heat-only unit features a highly efficient stainless steel heat exchanger that achieves operational efficiencies between 90% and 94.5%. Housed in a resilient, powder-coated casing, the boiler is completely weather-proofed and incorporates built-in frost protection to ensure uncompromised performance in harsh outdoor environments.

Designed with installer efficiency in mind, the 46/70kW model is supplied with a factory-fitted multi-directional flue system, significantly reducing onsite preparation time. The internal configuration includes mains isolating and test switches to streamline the commissioning process. Furthermore, this ErP A-rated unit offers future-proof versatility by being fully compatible with various biofuel blends, providing a robust and adaptable heating solution outside the main property envelope.

Q: What material is used for the primary heat exchanger?
A: The boiler utilises Grant's unique Vortex stainless steel heat exchanger for maximum thermal transfer and longevity.

Q: Can this unit run on alternative fuels?
A: The system is designed to be biofuel compatible, subject to the specific type and blend percentage utilised.

Q: Does the boiler require a separately purchased flue?
A: No, it is supplied out of the box with a factory-fitted multi-directional flue to accelerate the installation process.

Q: How does the unit protect itself during winter months?
A: The external casing houses dedicated built-in frost protection to prevent freezing damage to internal hydraulics.