The Grant Vortex Eco Utility 21-26kW Open Vent Oil Boiler is a highly efficient, oil-fired boiler designed for residential heating applications.

Key Features:

• Efficiency: The Vortex Eco Utility series is known for its high efficiency, often reaching up to 90% efficiency or higher, depending on the specific model and installation conditions. This makes it an environmentally friendly option, as it minimizes fuel consumption.

• Output: The 21-26kW rating refers to the boiler's output range, which is ideal for medium sized homes with multiple heating zones. 

• Open Vent: Open vent means the boiler is designed to work in an open-vented heating system, commonly referred to as a "tank-fed" system. This type of system uses a header tank in the loft to supply water to the heating system. The open vent system is traditionally used in older installations but is still reliable in modern setups, especially in areas without mains pressure systems.

• Oil-Fired Boiler: This boiler is fueled by oil, making it suitable for homes that do not have access to natural gas but still want an efficient and reliable heating solution. The use of oil is especially common in rural areas where oil tanks are often used to store heating fuel.

• Design and Build: The Vortex Eco Utility series is known for its compact design and durability, ensuring it can fit into a variety of spaces, such as kitchens, utility rooms, or garages. It is typically designed for easy installation and maintenance.

• Environmental Considerations: The Eco part of the name indicates that this is a more environmentally friendly version of the Vortex range. It is designed to produce lower emissions and offer more efficient combustion, which helps reduce the environmental impact of heating with oil.

• Noise Reduction: The Grant Vortex Eco Utility boiler also features a low-noise operation, making it more suitable for homes where boiler noise could be a concern.

Summary:

The Grant Vortex Eco Utility 21-26kW Open Vent Oil Boiler is a high-efficiency, oil-fired heating solution. It operates in an open-vented heating system, is suitable for properties without access to gas, and offers improved environmental performance with reduced emissions and fuel consumption.