The Grant Vortex Eco External 21–26kW is a high-efficiency oil boiler. Grant designed it for outdoor installation in a tough, weatherproof casing, ensuring long-lasting protection against the elements. As a result, it provides consistent and powerful central heating while keeping fuel use and emissions low. Therefore, it is an excellent choice for medium-sized homes that need greater heating performance with reliable efficiency.
Key Features of the Grant Vortex Eco External 21–26kW
- ✅ 21–26 kW Output Range – Well suited to medium heating and hot water demand.
- ✅ External Floor-Standing Design – Weatherproof enclosure saves valuable indoor space.
- ✅ High Efficiency (90%+) – Advanced stainless-steel heat exchanger and condensing technology lower running costs.
- ✅ Low NOx Burner – Cleaner combustion that meets modern environmental standards.
- ✅ Service-Friendly Access – Engineers can quickly reach key components within the protective casing.
- ✅ Quick Installation – Pre-plumbed and pre-wired setup reduces fitting time and disruption.
Why Choose This Grant Vortex Eco External 21–26kW Model?
- ✔️ Energy Efficient & Cost-Effective – It minimises oil consumption and, as a result, lowers household energy bills.
- ✔️ Built for Outdoors – Moreover, the robust casing ensures durability and long-term reliability in UK weather conditions.
- ✔️ Quiet Operation – Low operating noise keeps your outdoor spaces peaceful.
- ✔️ Future-Ready – In addition, the boiler supports HVO (Hydrotreated Vegetable Oil) blends for more sustainable heating.
This external boiler is a practical solution when indoor space is limited or when serving multiple areas, such as main houses and outbuildings, from a single outdoor plant. In addition, our G1 accredited installation and HeatCover V4 plan provide long-term protection and peace of mind. Consequently, the Grant Vortex Eco External 21–26kW offers reliable and efficient performance year after year.
For full technical specifications, visit the official Grant UK Vortex Eco External product page
What’s Included with Installation
- Standard horizontal flue
- System flush
- Corrosion inhibitor
- Condensate pipework installation
- Room thermostat and programmer
- Registration with local authorities and manufacturer
- Grant Mag One Duo filter
Installation & Service Area for the Vortex Eco External 21–26kW
Please note: This boiler comes with standard installation.
We provide installations across the East Anglia region.
For full installation criteria, please see our
Terms & Conditions.
