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Worcester Boilers

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Worcester-Bosch is a UK-based company that produces natural gas, propane and oil boilers, as well as heat pumps and solar heating systems for commercial and residential use. The company’s boilers are sold under the Greenstar brand name.  

Corporate History

In 1962 Worcester Engineering was founded to develop domestic oil-fired boilers. In 1987 the company was renamed Worcester Heat Systems to reflect its growth and acquisitions. In 1992, the company was acquired by the Bosch Group. The company is now known as Worcester-Bosch, and has manufacturing facilities in Worcester and Clay Cross in Derbyshire, UK, and a Training Academy in Worcester, UK. Altogether, it employs more than 2,000 people.

Worcester-Bosch parent company Bosch Thermotechnology Ltd., which also owns boiler brand Buderus, saw annual sales of more than $69,375 million USD in 2012.  

Product Lines

For its gas, oil and propane boilers, Worcester produces three system options: combi, regular and system boilers. Combi boilers heat homes and provide hot water directly from the boiler, whereas regular and system boilers send heat to a central heating system and produce hot water for a hot water cylinder. Unlike a regular boiler, a system boiler does not employ a feed/expansion cistern, but does include a pressure gauge and pump, the manufacturer explains. Within each category, there are several models to choose from with various features.

All Worcester boilers run at 90 percent efficiency or higher, which for many translates to an Energy Savings Trust (EST) seal of approval. Many of the company’s boilers can integrate with solar panels.

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Contacting Worcester

Worcester, Bosch Group
Cotswold Way, Warndon
Worcester, WR4 9SW

Phone: 08457 256 206


Worchester-Bosch offers a 2 year standard warranty on parts for most of its boilers. Some products also carry a 5- or 10-year guarantee on the primary heat exchanger and up to 10 years on the secondary heat exchanger.  The company offers extended warranties as well.  

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