Grant Vortex Eco Wall Hung External System 16–21kW Oil Boiler

Grant Vortex Eco Wall Hung External System

The Grant Vortex Eco Wall Hung External System 16–21kW is a compact, high-efficiency external oil-fired system boiler designed for installations where indoor floor space is limited. The sealed-system model is pre-plumbed and wall mounted, making it suitable for residential heating projects where an external boiler location is preferred.

The system model is Grant VTXSOMWH16/21 and provides a maximum output of 21kW. Grant specifies a set output of 18.7kW and space-heating efficiency of approximately 90.52%, with an A-rated heating energy classification.

Compact External Wall-Hung Design

The Vortex Eco Wall Hung External System is designed specifically for outdoor installation. Its durable external powder-coated casing provides protection for the boiler, while the wall-mounted configuration helps save valuable ground space.

The boiler measures approximately:

• Height: 832mm
• Width: 684mm
• Depth: 351mm
• Dry weight: 96.1kg
• Maximum output: 21kW
• Set output: 18.7kW

These specifications correspond to Grant’s current VTXSOMWH16/21 model.

Sealed System Boiler

As a sealed system boiler, the Vortex Eco Wall Hung External System incorporates key components required for a sealed central-heating installation.

The system model includes a factory-fitted:

• Expansion vessel
• Filling loop
• Pressure gauge
• Automatic air vent
• Pressure relief valve
• High-efficiency circulating pump

This configuration avoids the need for a traditional feed-and-expansion tank in the loft, subject to the requirements of the heating system and installation.

Factory-Fitted Flue

The Grant Vortex Eco Wall Hung External System is supplied with a factory-fitted multi-directional flue, helping provide greater flexibility when positioning the boiler outside the property.

The external range is specifically designed for situations where a floor-standing boiler is unsuitable or where available outdoor floor space is restricted.

Built-In Frost Protection

For outdoor installation, frost protection is an important feature. The Vortex Eco External Wall Hung range incorporates built-in boiler frost protection, helping protect the appliance during cold conditions.

The boiler also includes a mains isolating switch and test switch as part of its external installation configuration.

Efficient Oil-Fired Heating

The Vortex Eco Wall Hung External System uses Grant’s oil-boiler technology and is designed to provide efficient space heating while maintaining a compact external footprint.

Grant lists the model with:

• A heating energy rating
• Approximately 90.52% space-heating efficiency
• Class 2 NOx emissions
• 21kW maximum output
• 16–21kW output range
• Ecoflam burner
• Stainless-steel heat exchanger technology

Who Is the Grant Vortex Eco 16–21kW Suitable For?

The Grant Vortex Eco Wall Hung External System is particularly suitable for homeowners, heating contractors and property projects where:

• Indoor boiler space is restricted
• An external boiler installation is preferred
• A wall-mounted oil boiler is required
• A sealed central-heating system is being installed
• Ground space outside the property is limited
• A compact 16–21kW oil boiler is required

It can be considered for residential heating applications where the required heat load falls within the boiler’s output range.

 Specifications

Grant’s current product information confirms the VTXSOMWH16/21 as the sealed-system version of the Vortex Eco Wall Hung External 16–21kW range.

Frequently Asked Questions

What is the Grant Vortex Eco Wall Hung External System?

It is an external wall-mounted oil-fired system boiler from Grant’s Vortex Eco range. The sealed-system model is designated VTXSOMWH16/21 and has a maximum output of 21kW.

What output is the Grant Vortex Eco Wall Hung External System?

The model is specified in the 16–21kW output range, with a set output of 18.7kW and maximum output of 21kW.

Is this a condensing oil boiler?

Yes. The Grant Vortex Eco Wall Hung External System is part of Grant’s Vortex Eco condensing oil boiler range and is listed with an A heating energy rating and approximately 90.52% space-heating efficiency.

Is this a combi boiler?

No. This is a system boiler, not an oil combi boiler. The VTXSOMWH16/21 is the sealed-system version of the Grant Vortex Eco Wall Hung External range.

Can the boiler be installed outside?

Yes. It is specifically designed for external wall-mounted installation and features an external powder-coated casing, built-in frost protection and a factory-fitted flue.

Does it include a flue?

Yes. The Grant Vortex Eco Wall Hung External System is supplied with a factory-fitted multi-directional flue.

What are the dimensions?

The VTXSOMWH16/21 measures approximately 832mm high × 684mm wide × 351mm deep.

How much does the boiler weigh?

The sealed-system model has a dry weight of approximately 96.1kg.

Does the system model include an expansion vessel?

Yes. Grant states that its sealed-system models include a factory-fitted expansion vessel, filling loop, pressure gauge, automatic air vent, pressure relief valve and high-efficiency circulating pump.

Does it have frost protection?

Yes. The external wall-hung range has built-in boiler frost protection for outdoor installation.

What is the energy rating?

The Grant Vortex Eco Wall Hung External System has an A heating energy rating.

Is the Grant Vortex Eco available from Euro Fuel Supply?

Yes. Euro Fuel Supply can supply the Grant Vortex Eco Wall Hung External System for European heating projects, subject to current stock and delivery availability.