Grant Vortex Pro External Oil Boiler 26kW – VTXOM15/26

The Grant Vortex Pro VTXOM15/26 is a premium external floor-standing oil boiler delivering 26kW of heat output with some of the highest efficiencies available on the market. Featuring Grant’s renowned stainless steel Vortex heat exchanger, the latest Riello burner technology, and a factory-fitted multi-directional flue, this boiler is engineered for fast installation, reliable performance, and year-round durability in all weather conditions.

Ideal for homes requiring a heat-only (regular) boiler, the Vortex Pro external module keeps the boiler outside — freeing up valuable indoor space while delivering quiet, efficient heating. It’s even compatible with an RF wireless programmer (not included) for convenient remote control from inside the building.

Key Features

• 26kW heat output – powerful and efficient space heating for larger homes
• ERP A-rated efficiency – among the highest efficiencies in its class
• Stainless steel Vortex heat exchanger – Grant’s proven, highly efficient original design
• Factory-fitted multi-directional flue – reduces installation time significantly
• Latest Riello burner technology – reliable, low-NOx combustion (NOx Class 2)
• External floor-standing installation – durable design built for all weather conditions
• Built-in frost protection – safeguards the boiler during cold spells
• Quiet operation – low noise level of just 51dB
• RF wireless programmer compatible – plug-in receiver for remote control (programmer not included)
• Simple installation – no complicated wiring or plumbing required
• Biofuel compatible – depending on biofuel type and % blend
• Solar compatible
• Mains isolating switch & test switch included

What's in the Box

• 1 x Grant Vortex Pro External Oil Boiler (VTXOM15/26)
• Factory-fitted multi-directional flue

Key Specifications

• Brand: Grant
• Model / Part No: VTXOM15/26
• Range: Vortex Pro
• Boiler Type: Heat Only (Regular)
• Fuel Type: Oil
• Heat Output: 26kW (88,712 BTU/h)
• CH Condensing Max Output: 26kW
• ERP Rating: A
• NOx Class: Class 2
• Noise Level: 51dB
• Mount Type: Floor Standing (External)
• Display: Analogue
• Dimensions (H x W x D): 908mm x 370mm x 796mm
• Max Vertical Flue (100mm & 125mm): 12m
• Max Horizontal Flue (100mm & 125mm): 4m
• Includes Flue: Yes
• Solar Compatible: Yes
• Biofuel Compatible: Yes (type/blend dependent)
• Guarantee: 1 year minimum (subject to T&Cs)
• DHW Output: Not applicable (heat only boiler)