Grant Vortex Eco External Wall Hung 55-70 Boiler Only
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An external wall-mounted oil-fired boiler that takes the boiler out of the house altogether. The Grant Vortex Eco External Wall Hung 16-21kW Heating Boiler Only (VTXOMWH16/21) mounts outside on a wall bracket and delivers up to 21kW of heat-only output with ErP A-rated efficiency — ideal for UK homes off the gas grid where indoor plant space is tight.
Key features:
- External wall-hung installation — no boiler taking up utility or kitchen space, and no separate boiler house needed
- Heating (heat-only) boiler for systems with a separate hot water cylinder
- Supplied as the boiler only — flue kit and accessories purchased separately
- 18.7kW set output, 21kW maximum — suited to small and medium homes
- ErP A-rated for heating efficiency, helping keep oil consumption down
- HVO-ready: compatible with hydrotreated vegetable oil for a lower-carbon fuel path
- Eligible for a 5-year guarantee when installed by a Grant G1 Installer
Use cases / applications:
- Off-gas-grid homes replacing an ageing internal or external oil boiler
- Properties where internal space is needed back — the boiler moves outside
- Like-for-like swaps on existing heat-only oil systems with a cylinder and tank arrangement
- Future-proofing against fuel transition with HVO compatibility
Why choose this product: Grant is the UK's leading name in oil-fired heating, and the Vortex Eco External Wall Hung combines that pedigree with a compact 832mm x 684mm footprint, A-rated efficiency and a wall-mounted design that puts the boiler out of sight and out of the way.
Key Features
- Type: External wall-hung oil heating (heat-only) boiler
- Supplied as: Boiler only (flue kit sold separately)
- Brand/Range: Grant — Vortex Eco
- Model/Code: VTXOMWH16/21
- Output: 18.7kW set output, 21kW maximum (71,654 BTU)
- Efficiency: ErP A-rated for heating
- Fuel: Oil, HVO-ready
- Installation: External wall-mounted — professional installation by an OFTEC-registered engineer required
- Warranty: 5 years when installed by a Grant G1 Installer (subject to manufacturer's T&Cs)
Specifications
| Specification | Details |
|---|---|
| Brand | Grant |
| Product | Vortex Eco External Wall Hung 16-21kW Heating Boiler Only |
| Manufacturer Stock Code | VTXOMWH16/21 |
| EAN | 5060090372680 |
| Range | Vortex Eco |
| Category | Oil Boilers |
| Sub-Category | Domestic Boiler |
| Type | Heating (heat only), external wall hung |
| Supplied As | Boiler only |
| Fuel | Oil (HVO-ready) |
| Set Output | 18.7kW |
| Maximum Output | 21kW |
| ErP Heating Rating | A |
| Height | 832mm |
| Width | 684mm |
| Depth | 351mm |
| Weight | 92.1kg |
| Colour | White |
| Ready for 20% Hydrogen | No |
| Ready for HVO | Yes |
| Magnetic Filter Included | No |
| Warranty | 5 years (subject to manufacturer's T&Cs, G1 Installer) |
