Grant Vortex Eco Utility Oil Boiler – 15-21kW | Floor Standing | ErP A Rated

The Grant Vortex Eco Utility is a highly efficient, floor-standing condensing oil boiler developed as a direct response to customer demand for a competitively priced, high-performance heating solution. Combining Grant’s award-winning engineering with a simplified casing, streamlined control panel, and practical pipework arrangement, the Vortex Eco Utility delivers outstanding space heating efficiencies of 91.7% to 92.7% — all at an accessible price point for both new installations and replacements.

Incorporating the latest Riello RDB burner and Grant’s patented stainless steel heat exchanger, this boiler is built for reliability, efficiency, and ease of servicing. Its front-access design means engineers can service the burner and combustion chamber quickly and efficiently, reducing time on site and keeping maintenance costs low.

Ideal For

• Oil-fired central heating systems in domestic and light commercial properties
• System boiler installations with a separate hot water cylinder
• Replacement of existing floor-standing oil boilers
• Properties seeking an ErP A-rated, SEDBUK A-rated condensing boiler at a competitive price
• Installations requiring flexible fluing options (top, rear, left, or right)
• Biofuel-compatible heating systems (subject to fuel type and blend percentage)

Why Choose the Grant Vortex Eco Utility?

• ErP A Rated & SEDBUK A Rated – Among the most energy-efficient oil boilers available, delivering space heating efficiencies of 91.7% to 92.7% and helping to reduce fuel bills.
• Award-Winning Stainless Steel Heat Exchanger – Grant’s patented heat exchanger delivers superior heat transfer, long-term durability, and excellent condensing performance.
• Riello RDB Burner – Industry-leading burner technology for reliable ignition, quiet operation, and low NOx emissions (NOx Class 2).
• Quiet Operation – Noise level of just 51dB, making it suitable for utility rooms and spaces close to living areas.
• Flexible Fluing – Can be flued from the top, rear, left, or right-hand side; compatible with Grant EZ-Fit flue systems for straightforward installation.
• Front Access Design – Burner and combustion chamber positioned at the front for easy, time-efficient servicing and maintenance.
• Biofuel Compatible – Compatible with certain biofuel blends, future-proofing the installation as low-carbon fuel options become more widely available.
• Solar Compatible – Can be integrated with solar thermal systems for enhanced energy efficiency.
• Extended Warranty Available – 1-year standard warranty; 2 years if registered within 30 days; extended to 5 years when installed by a registered G1 installer with a Grant or equivalent filter.
• White Cased – Clean, professional white casing suitable for utility room and plant room installations.

Technical Specifications

• Brand: Grant
• Range: Vortex Eco
• Model Number: VTXSECO15/21
• Supplier Part Number: VTXSECO15/21
• Boiler Type: Heat Only (System) Boiler
• Mount Type: Floor Standing
• Fuel Type: Oil (Biofuel compatible – subject to type and blend)
• Heat Output: 15–21 kW (71,652 BTU/h)
• CH Condensing Max Output: 21 kW
• DHW Output: 21 kW (15–21 kW range)
• DHW Flow Rate at 35°C Rise: Not applicable (system boiler)
• Energy Efficiency Rating: A (ErP)
• SEDBUK Rating: A
• NOx Class: Class 2
• Noise Level: 51 dB
• Height: 860mm
• Width: 370mm
• Depth: 605mm
• Display Type: Analogue
• Max Horizontal Flue (100mm): 4m
• Max Horizontal Flue (125mm): 4m
• Max Vertical Flue (100mm): 12m
• Max Vertical Flue (125mm): 12m
• Solar Compatible: Yes
• Includes: Boiler only
• Warranty: 1 year standard; 2 years if registered within 30 days; up to 5 years with G1 installer and Grant/equivalent filter

What’s Included

• 1 x Grant Vortex Eco Utility Oil Boiler (15-21kW)
• Manufacturer’s installation and user documentation
• Note: Flue system, filter, and cylinder sold separately. Extended warranty requires G1 installer registration and compatible filter.

Installation & Compliance Notes

The Grant Vortex Eco Utility must be installed by a registered OFTEC engineer in accordance with BS 5410, current Building Regulations, and the manufacturer’s installation guidelines. Oil storage and supply pipework must comply with the Control of Pollution (Oil Storage) Regulations. For maximum warranty coverage, installation must be carried out by a Grant G1 registered installer with a Grant or equivalent system filter fitted.

Flue installation must comply with the manufacturer’s flue design guidelines and relevant Building Regulations. Always commission and test the system in accordance with OFTEC procedures prior to handover.

For trade pricing, bulk orders, or technical support, please contact our team directly.