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The new ErP-compliant Purewell Variheat cast iron condensing boiler from Hamworthy Heating features the advanced Siemens LMS controls platform – already used in all condensing, pre-mix Hamworthy boilers. It allows cascade options controlling multiple boilers and hot water at the same time, providing energy-savings and allowing flexible control regimes. This new version is also equipped with full spark ignition, updated from the previous hot surface ignitor.
The core of the boiler remains the same – a cast iron heat exchanger with large waterways, making it tolerant of older heating systems. A 6 bar pressure rating makes the boiler suitable for high rise buildings.
A secondary heat ex-changer with copper tube and aluminium fins allows the boiler to condense, which means it is not only highly efficient but also compliant with all Building Regulations and the Energy-related Products (ErP) directive. Thanks to low NOx performance (>40mg/kWh, European Class 6), the Purewell Variheat mk2 also scores well on assessments for future-proof heating system design and building performance.
The Purewell Variheat mk2 comes with a 10-year warranty on the heat exchangers.