Description
The Grant Vortex Eco Internal Wall Hung 16–21kW Oil Boiler is a compact, high-efficiency oil boiler designed for properties where floor space is limited. Wall mounted and discreet, it delivers reliable central heating performance while maintaining low fuel consumption and emissions.
Designed for internal wall-hung installation, this boiler is ideal for kitchens, utility rooms, or cupboards where a traditional floor-standing boiler is not suitable. As a heat-only boiler, it is intended for use with a hot water cylinder, making it well suited to conventional heating systems in smaller to medium-sized homes.
Built with Grant’s proven stainless-steel heat exchanger and advanced condensing technology, the Vortex Eco wall-hung boiler offers dependable performance, quiet operation, and long-term reliability. The boiler is also HVO-ready, helping future-proof your heating system.
Key Features of the Grant Vortex Eco Internal Wall Hung Boiler
✅ 16–21 kW Output Range – Suitable for low to moderate heating demand
✅ Internal Wall-Hung Design – Saves floor space and allows flexible installation
✅ High Efficiency (90%+) – Condensing technology helps reduce oil usage
✅ Low NOx Burner – Cleaner combustion meeting modern standards
✅ Stainless-Steel Heat Exchanger – Durable and corrosion resistant
✅ Quiet Operation – Ideal for indoor living spaces
Why Choose the Grant Vortex Eco Internal Wall Boiler?
✔️ Space-Saving Solution – Perfect where internal space is limited
✔️ Efficient & Cost-Effective – Helps keep running costs under control
✔️ Reliable & Well-Built – Trusted Grant engineering and components
✔️ Future-Ready – Compatible with HVO (Hydrotreated Vegetable Oil) biofuel blends
The Grant Vortex Eco Internal Wall Hung 16–21kW Oil Boiler range is designed for homeowners who want efficient heating in a compact format. When installed professionally and serviced regularly, it provides reliable performance year after year across East Anglia.
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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