Worcester Boilers are Rated the Best Boiler on Which?
Combi Boilers Are a Very Popular Choice

worcester bosch greenstar
Why a combi boiler? Do you require very high amounts of hot water? A Greenspring instantaneous water heater is a highly efficient alternative to storing hot water in a separate cylinder. It offers up to 28.8 litres per minute of hot water making it the perfect solution for large domestic as well as small, medium and large commercial applications that use multiple sinks, baths and showers. Please note the Greenspring water heater will only provide hot.
Combi boilers are the most popular heating and hot water solution in the UK. Over 15 million have been fitted across the country and they are now the preferred choice for most householders and installers. Worcester was the pioneer of the combi boiler in the UK, with the Greenstar range developed to suit virtually all homes.
Energy saving and convenient All Worcester Greenstar combis are designed and manufactured to provide high levels of performance and operating efficiency. This is achieved through features such as the ‘keep hot’ facility which ensures that hot water is almost instantly available whenever it’s required. The boilers also incorporate a special ‘ECO’ mode button which can be used to over-ride the ‘keep hot’ facility. This has the bonus of using less gas, as energy is only used when hot water is required. For added efficiency, models such as the Greenstar CDi Classic, Greenstar CDi Compact and Greenstar Si Compact condense in both hot water and heating modes.
on demand directly from your supply.
The Main Attributes of a Combi Boiler
√ Compact Size perfect solution for limited space
√ No bulky water cylinder
√ Hot Water available on demand
√ Only heat the water you use
√ No need to store water
√ Heat to radiators on demand New A rated
Worcester Bosch Greenstar system boilers.
Greenstar system boilers are known for their high quality and reliability, making them robust enough to stand up to the highest of heating and hot water demands. Efficient and economical Ultra efficient and economical to run, Worcester system boilers incorporate many of the heating and hot water components found in a traditional heating system, making installation less disruptive and neater. Space saving and attractive
The compact size of Greenstar i System boilers means that they can fit perfectly into many locations, with the 27kW and 30kW models even fitting into a standard kitchen cupboard. With a smart design, they’ll also look great in your home, whether alongside cupboards or placed on their own.
As Worcester Bosch partners our Worcester system boilers can be used with a wide choice of optional controls to maximise comfort and energy savings, and are also perfectly matched to our comprehensive range of Greenstore hot water cylinders.
Choosing a complete Worcester system will ensure you will have a highly efficient solution and the opportunity to get a comprehensive 5-10 year guarantee across your entire system. System boilers are also compatible with our Greenskies solar water heating systems, which can be installed at the same time as the boiler or easily retrofitted in the future to reduce your energy bills even further.
The wall-mounted Greenstar CDi Classic System series are high performance, high efficiency boilers that suit bigger homes with larger heating and hot water needs. They are compatible with a wide range of optional controls for even greater time and temperature setting flexibility as well as added energy savings.
Worcester Bosch Greenstar in detail:
- Stored hot water can be rapidly replenished with high output options
- The CDi Classic has set the heating industry benchmark for efficiency, helping to reduce gas bills
- Low energy pump reduces electrical consumption
- Frost protection reduces frost risk if installed in a garage or loft



