COMMERCIAL SUPPLEMENT


BOILER Hamworthy Heating


Address: Wessex House, Units 7&8, New Fields Business Park, Stinsford Road, Poole, Dorset, BH17 0NF 01202 662500,


Web: www.hamworthy-heating.com


Product name - fuel type - boiler type - wall hung or floor standing - output range - maxium gross efficiency - NOx emissions - size (w,h,d)


• Wessex ModuMax mk3 – Natural Gas or LPG – High efficiency, pre-mix, condensing, fully modulating, stainless steel – Floor standing – 97 to 762kW – 95% – 40mg/kWh – 680 x 2084 x 1128


• Stratton mk2 – Natural Gas or LPG – High efficiency, pre-mix, condensing, fully modulating, stainless steel – Wall hung – 40 to 150kW – 95% – max 40mg/kWh – 487 x 895 x 668


• Upton – Natural Gas or LPG – Pre-mix, condensing, fully modulating, aluminium – Floor standing – 100 to 1050kW – 95% – max 40mg/kWh – 700 x 2017 x 1220


• Varmax – Natural gas or LPG (up to 320kW) – High efficiency, pre-mix, condensing, fully modulating, stainless steel – Floor standing – 120 to 600kW – 96% – Max 55mg/kWh – 1161 x 2016 x 1588


• Purewell Variheat mk2 – Natural Gas, LPG (Channel Islands only) – High efficiency, pre-mix, condensing, fully modulating, cast iron – Floor standing – 70 to 180kW – 96% – Max 40mg/kWh – 534 (w) x 1286 (h) x 865mm (d)


Installation aids available


• Pipe kits • Flue kits


Controls available • Weather compensation • Cascade control • Sequencers • Integrating controls


Other products available


• Thermal storage vessels / cylinders • Air source heat pumps • Gas fired water heaters


CaseStudy A


n educational building in Hampshire has improved efficiency and sustainability with the installation of three Hamworthy Modumax mk3 floor standing condensing boilers. The project replaced an ageing steel


shell boiler that had been in service for nearly 30 years, operating at around 80% efficiency. The previous fixed-output system suffered from poor responsiveness,


frequent cycling, high fuel use and rising maintenance costs. With the building operating 24/7, a more adaptive and energy-efficient solution was required, fully integrated with the site’s BMS. Working with ARB Mechanical Engineering and Salvis Group Ltd,


Hamworthy Heating supplied three Modumax mk3 boilers, each comprising three vertically stacked 762kW modules to deliver a combined 2286kW output across nine modules. The modular, stackable design achieves a high output- to-footprint ratio, allowing installation within the existing plantroom while improving modulation and efficiency. The site’s nine Hamworthy Wessex mk2 boilers, installed 10 years earlier,


were retained as secondary support units, with the original shell boiler held in reserve. Flow and return headers from Hamworthy Heating were also supplied to ensure effective hydraulic separation and optimal distribution. The system achieves a seasonal efficiency of up to 95% and an overall 45:1


turndown ratio across the nine modules, enabling precise response to real- time heating demand. This reduces cycling and lowers energy use and carbon emissions.


Brief company history Country of origin: UK Founded in: 1914


Established in the UK in: 1914 Number of employees in the UK: 63


Unique selling points Hamworthy Heating is a British commercial heating manufacturer. With an extensive range of the latest commercial boilers, hot water heaters and air source heat pumps, we can offer advice and help to ensure you specify the right solution for your commercial heating needs. Our technical experts and their impressive industry knowledge make a real difference to your projects. From help with sizing hot water to replacing commercial boilers, and everything you need to know about heat pumps, legislation and technology - you’ll find us friendly, knowledgeable and easy to deal with, every step of the way. We know that one size doesn’t fit all so we’ll make sure that we understand your needs and requirements to fully support you at each stage of your commercial project.


Contact: sales@hamworthy-heating.com,


Individual modules can be taken offline for servicing without disrupting


performance, further minimising downtime. Matthew Kirkpatrick, Salvis Group Ltd, said: “We chose the Modumax for


its excellent turndown ratio and high output relative to its footprint, which is essential in space-constrained plant rooms. We’d recommend it for similar projects.” The project, completed with minimal disruption, provides the building with


a reliable, flexible and future-ready heating system that supports its long- term sustainability strategy.


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