17/07/2018
  • Water heaters
  • Company news
  • Product launch
  • Energy efficiency
Hamworthy launches compact condensing water heater

Hamworthy Heating has launched a series of new compact direct-fired condensing water heaters for smaller applications. The Dorchester DR-CC extends Hamworthy’s hot water range to offer a solution for every building.


The Dorchester DR-CC low output water heater comes in 9 models with a hot water storage capacity ranging from 160 to 380 litres, available as gas or LPG-fired version.  

With continuous outputs starting from 228 l/h, the water heater is ideal for small to medium-sized commercial projects. A gross thermal efficiency of 95-98% with modulating burner enables close load matching, making it more economical to run, thanks to less wasted energy and reduced running costs. The Dorchester DR-CC is an A-rated condensing water heater thanks to its high efficiency. Along with low NOx emissions (<38mg/kWh), it exceeds ErP requirements coming into effect in September 2018.

As a direct fired water heater, it can operate independently from a gas boiler, optimising efficiencies in both hot water and heating system.

Kevin Potter, Business Development Manager for Hot Water Solutions at Hamworthy, adds,

“We’re pleased to welcome the Dorchester DR-CC water heater to our range – it’s compact, yet powerful. It’s great we could extend our product offer even further by lower output models. The Energy-related Products Directive is about to cause another major change in the industry: atmospheric water heaters will not meet the efficiency requirements coming into force on 26th September 2018. However, our new condensing water heater exceeds those requirements. The regulation will also enforce maximum NOx emission levels from the same date, the Dorchester DR-CC’s are already much lower than the legislation will dictate.”

The heat exchanger coil positioned in the middle of the unit ensures even heat distribution in the cylinder. This makes stratification in the unit less likely and removes the need for a hot water recirculation kit. Thanks to a down-firing burner, the impact of scale is also reduced.

Flexible flue options combined with minimal clearances of the compact size water heater allow an installation almost anywhere, while fitting through a standard door for easy access to the plant room. Fully room-sealed, it can also be sited in small compartmental areas. Simple controls and components accessible through the cover make operation and maintenance easy and low-cost. An optional unvented kit is available to enable direct connection to mains water supply while improving hot water pressures in low-level buildings.

For peace of mind, the Dorchester DR-CC is delivered with low-maintenance inert anodes to protect the vessel against corrosion.

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