Energy Savings Trust HVO
Vortex Eco: Internal Wall Hung

5 Year guarantee*

Vortex Eco: Internal Wall Hung

Grant’s popular Internal Wall Hung boilers are sleek, white cased models suitable for when a floor standing boiler cannot be accommodated.

Four internal models are available ranging in size from 12kW to 16kW, with sealed system and open-vented system variants. The Grant Vortex Internal Wall Hung boiler range features Grant’s patented stainless steel heat exchanger and turbulator baffle system.

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Features & benefits

  • *5 year guarantee when installed by a G1 Installer (Terms and Conditions apply)
  • Available in outputs of 12-16kW and 16-21kW
  • Efficient operating units achieving space heating efficiencies of 90.13 – 90.5%
  • Wall mountable boilers providing space saving alternatives to floor standing units
  • Open-vented system and sealed system models available
  • Quiet operation
  • Compatible with Grant EZ-Fit low level, high level and vertical flue systems - read more about Grant EZ-Fit flue systems here
  • As with all of Grant’s Vortex oil boilers, this range is biofuel compatible (depending on the type of biofuel and % blend)
  • Heating engineers should visit the Professionals Vortex Eco Internal Wall Hung range webpage to read more about these models
What is pluming?

What is pluming?

Condensing boilers, such as the Grant Vortex, operate at extremely high efficiency levels, producing cool flue gas temperatures which result in a ‘plume’ of vapour being visible at the flue terminal. This plume (steam) is a normal condition of condensing boiler operation and indicates that the appliance is working efficiently.

Prior to installation, the position of the flue needs to be considered to ensure that the plume does not cause any inconvenience. Grant EZ-Fit flue systems are designed to ensure pluming is kept well out of the way of any windows, air vent or doors, and out of sight. Read more about flue systems from Grant UK here.


Product code
Set Output
Max Output
NOx Emissions
Energy Rating
Load Profile
Energy Label
Product Fiche
VTXWH12/16 Grant Vortex Eco Wall Hung 12-16 14kW 16kW 91.1kg 842mm 630.5mm 335.5mm 90.13 Class 2 a Heating - View View
VTXWH16/21 Grant Vortex Eco Wall Hung 16-21 18.7kW 21kW 91.1kg 842mm 630.5mm 335.5mm 90.52 Class 2 a Heating - View View
VTXSWH12/16 Grant Vortex Eco Wall Hung System 12-16 14kW 16kW 98kg 842mm 630.5mm 355.5mm 90.13 Class 2 a Heating - View View
VTXSWH16/21 Grant Vortex Eco Wall Hung System 16-21 18.7kW 21kW 98kg 842mm 630.5mm 335.5mm 90.52 Class 2 a Heating - View View


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There is a lot of terminology in the world of heating so this section is here to provide you with the definitions and clarity.

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