Description
The Grant Vortex Pro Combi XS 26kW Oil Boiler is a compact, high-efficiency combi boiler designed for properties where space is limited but performance cannot be compromised. Reliable and efficient, it provides both central heating and instant hot water from a single unit, eliminating the need for a hot water cylinder.
The XS (extra slim) design makes this boiler ideal for kitchen cupboards, utility rooms, or tighter installation spaces where a standard oil combi may not fit. Despite its compact size, the Vortex Pro Combi XS delivers strong, consistent performance suitable for small to medium-sized homes.
Built to Grant’s premium Vortex Pro specification, this boiler features a stainless-steel heat exchanger, advanced condensing technology, and a high-quality oil burner to ensure long-term reliability, quiet operation, and excellent efficiency. The boiler is also HVO-ready, helping future-proof your heating system.
Key Features of the Grant Vortex Pro Combi XS 26kW
✅ 26 kW Output – Suitable for heating and hot water demand in small to medium-sized homes
✅ Combi Boiler – Provides heating and instant hot water without a cylinder
✅ Slimline XS Design – Ideal for compact installation spaces
✅ High Efficiency (90%+) – Condensing technology helps reduce oil consumption
✅ Low NOx Burner – Cleaner combustion meeting modern environmental standards
✅ Stainless-Steel Heat Exchanger – Durable and corrosion resistant
✅ Quiet Operation – Suitable for internal installation
Why Choose the Grant Vortex Pro Combi XS Oil Boiler?
✔️ Space-Saving Solution – Perfect where cupboard or utility space is limited
✔️ Efficient & Cost-Effective – Reduces oil usage and running costs
✔️ Reliable & Well-Built – Trusted Grant engineering and premium components
✔️ Future-Ready – Compatible with HVO (Hydrotreated Vegetable Oil) biofuel blends
The Grant Vortex Pro Combi XS 26kW Oil Boiler is designed for homeowners who want the convenience of a combi boiler in a compact footprint. When installed professionally and serviced regularly, it delivers dependable heating and hot water year after year.
For detailed product specifications, please visit the official Grant UK page.
Enhance peace of mind with our HeatCover V4 plan
and our G1-accredited installation for dependable support and long-term performance.
What’s Included with Installation
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Standard horizontal flue
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System flush
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Corrosion inhibitor
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Condensate pipework installation
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Room thermostat and programmer
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Registration with local authorities and manufacturer
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Grant Mag One Duo filter
Installation & Service Area
Please note: This boiler includes standard installation.
We only install boilers in the East Anglia region.
For full installation criteria, please see our Terms & Conditions.

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