Open Vent boilers

An ideal replacement for older boiler systems, our range of open vent boilers are designed to be installed on an open vented system.

Often referred to as regular, conventional or heat only boilers, an open vent boiler system will usually comprise of two tanks in the loft, a hot water storage cylinder and a separate pump.

All of the open vent boilers in our range are built around our long established reputation for producing high quality heating systems.

Offering the latest in heating technology, our open vent boiler range defines the quality benchmark for other brands and is focused on using energy efficiently, cutting costs, saving natural resources and protecting the environment.

Benefits of a Viessmann Open Vent boiler 

  • An ideal replacement for traditional heating systems without having to make pipework changes

  • Ideal for installation into homes with older radiator systems

  • Ideal for delivering hot water to two or more bathrooms in a property

  • Ideal for homes where large volumes of hot water will be used at the same time

  • Comprehensive warranty on the entire range, as standard

  • Depth of only 285 mm (340 mm for 35 kW model) for installation into standard kitchen wall units

  • No pump overrun required 

Vitodens 100-W Open Vent

Wall mounted gas fired open vent boiler

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