Worcester Bosch Gas Boilers

WORCESTER





Greenstar Gas Combination Boilers

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.

Greenstar i Gas Combination Boiler overview.

Our Greenstar i combi boiler is perfect for small to medium sized homes with one bathroom.

Greenstar i Gas Combination Boiler New in 2015, and replacing a well-established award-winning boiler that has been installed in over 1 million homes across the UK, our latest model now has a user-friendly control that allows you to adjust your heating and hot water to meet your exact requirements.

 

 

  • Simple boiler controls with clear information display
  • Zero risk of condensate pipe freezing in severe weather* **
  • Wide choice of controls enables greater comfort and economy
  • Low energy pump reduces electrical usage
  • Instantaneous hot water, always available
  • Achieves an A+ ErP package efficiency rating for heating when installed with a Wave smart internet connected control
Worcester Greenstar i Combination Boiler

Greenstar i Gas Combination Boiler

Greenstar CDi Classic Gas Combination Boiler overview.

Greenstar i Gas Combination Boiler Our Greenstar CDi Classic boiler is our top of the range combi boiler offering the highest levels of hot water comfort. This boiler has set the benchmark within the industry for efficiency and reliability and is suitable for homes with one or two bathrooms.

 

 

  • Highest hot water flow rate of the Greenstar combi wall mounted range
  • Simple boiler control knobs with clear temperature display
  • Low energy pump reduces electrical usage
  • Frost protection is included, reducing frost risk if installed in a garage or a loft
  • Larger two bathroom properties can be supplied by higher output options
  • Wide choice of controls enables greater comfort and economy
  • Instantaneous hot water, always available
  • Inbuilt keyless filling link making it easy to refill your system
  • Large Condensesure style siphon built into the boiler - eliminates frost risk*
Worcester Greenstar CDi Classic

Worcester Greenstar CDi Classic

Greenstar Si Compact Gas Combination Boiler overview.

Greenstar i Gas Combination BoilerOur Greenstar Si Compact combi boiler is suitable for small to medium sized homes with one bathroom.

This boiler is designed to fit within a standard kitchen cupboard and has an easy to use control that allows you to fine tune your comfort.



  • Fits in a standard kitchen cupboard
  • User-friendly displays for ease of use
  • Hot water can be adjusted to fine tune your comfort
  • Wide choice of controls enables greater comfort and economy
  • Frost protection is included, reducing frost risk if installed in a garage or a loft
  • Simple boiler control knobs with clear temperature display
  • Low energy pump reduces electrical usage
  • Instantaneous hot water, always available
  • Achieves an A+ ErP package efficiency rating for heating when installed with a Wave smart internet connected control
Greenstar Si Compact Gas Combination Boiler

Greenstar Si Compact Gas Combination Boiler

Greenstar CDi Compact Gas Combination Boiler overview.

Greenstar CDi Compact Gas Combination Boiler Our Greenstar CDi Compact combi boiler is suitable for small, medium, and large-sized properties with one or two bathrooms.

This boiler is designed to fit within a standard kitchen cupboard. Despite its compact size, the high outputs make it suitable for homes with more than one bathroom.



  • Fits in a standard kitchen cupboard
  • User-friendly displays for ease of use
  • Hot water can be adjusted to fine tune your comfort
  • Simple boiler control knobs with clear temperature display
  • Frost protection is included, reducing frost risk if installed in a garage or a loft
  • Wide choice of controls enables greater comfort and economy
  • Low energy pump reduces electrical usage
  • Instantaneous hot water, always available
  • Achieves an A+ ErP package efficiency rating for heating when installed with a Wave smart internet connected control
Greenstar CDi Compact Gas Combination Boiler

Greenstar Si Compact Gas Combination Boiler

Greenstar CDi Highflow Gas Boiler overview.

Greenstar CDi Compact Gas Combination Boiler Our Greenstar CDi Highflow is a well-established floor standing combi boiler that is renowned for industry-leading hot water flow rates.

Perfect for larger homes with two bathrooms. Fits underneath a standard kitchen worktop



  • Fits underneath a standard kitchen worktop
  • Larger two bathroom homes can be supplied by higher output options
  • Wide choice of controls enables greater comfort economy
  • Frost protection is included, reducing frost risk if installed in a garage or a cellar
  • Simple boiler control knobs with temperature display
  • Instantaneous hot water, always available
Greenstar CDi Highflow Gas Boiler

Greenstar CDi Highflow Gas Boiler

Greenstar Gas 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.

Perfect partners 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-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.

Greenstar i System (9kW to 24kW) Gas Boiler overview.

Greenstar CDi Compact Gas Combination Boiler Our Greenstar i System boiler is our most popular system boiler that is suitable for small to medium sized homes.

This boiler can also be used with our high efficiency Greenstore cylinders for a complete Worcester system solution for your home.



  • Simple boiler controls with clear information display
  • Suitable for homes where the heating system includes a hot water storage cylinder
  • Choice of controls enables greater comfort and economy*
  • Can be used with Greenskies solar panels for energy and cost savings
  • Low energy pump reduces electrical usage
  • Large Condensesure style siphon built into the boiler - eliminates frost risk**
Greenstar i System (9kW to 24kW) Gas Boiler

Greenstar i System (9kW to 24kW) Gas Boiler overview

Greenstar i System (27kW and 30kW) Gas Boiler overview.

Greenstar i System (27kW and 30kW) Gas Boiler Our higher output Greenstar i System boiler is part of that latest generation of smaller and lighter boilers.

Suitable for small, medium, and large homes, the boiler can also be fitted in a standard kitchen cupboard.

This boiler can be used with our range of high efficiency Greenstore cylinders for a complete Worcester system solution for your home.

  • Fits in a standard kitchen cupboard
  • Simple boiler control knobs with clear temperature display
  • User-friendly displays for ease of use
  • Can be used with Greenskies solar panels for energy and cost savings
  • Low energy pump reduces electrical usage
Greenstar i System (27kW and 30kW) Gas Boiler

Greenstar i System (27kW and 30kW) Gas Boiler

Greenstar CDi Classic System Gas Boiler overview

Greenstar CDi Classic System Gas Boiler overview Our Greenstar CDi Classic System is our top of the range wall mounted system boiler that is suitable for larger homes.

This boiler can be used with our range of high efficiency Greenstore cylinders allowing stored hot water to be rapidly replenished.



  • Highest central heating output of the Greenstar system boiler range
  • Simple boiler control knobs with digital display and one button commissioning mode
  • Our CDi Classic has set the heating industry benchmark for efficiency, helping to reduce energy usage
  • Low energy pump reduces electrical usage
  • Frost protection is included, reducing frost risk if installed in a garage or a loft
  • Can be used with Greenskies solar panels for energy and cost savings
  • Choice of controls enables greater comfort and economy*
  • Large Condensesure style siphon built into the boiler - eliminates frost risk*
Greenstar i System (27kW and 30kW) Gas Boiler

Greenstar CDi Classic System Gas Boiler overview

Greenstar Regular Gas Boilers.

With quality and reliability at the heart of every Worcester regular boiler, they are robust enough to deliver efficient heating and hot water year after year.

Modern efficiencies with over 90% efficiency, Greenstar regular boilers will help reduce your energy bills and your carbon footprint. They can enhance heating and hot water performance in all sizes of homes, including those with two or more bathrooms, and where mains water pressure is low.

Small in stature the compact size and smart design of Greenstar regular boilers means that they will look great in any home, with several options readily fitting into a standard kitchen cupboard. Replacement installation is often simple and straightforward, which keeps costs down and disruption to a minimum.

Worcester regular boilers also perfectly meet the need for large hot water requirements. For example, two bathrooms can be comfortably used at once with no loss of pressure or temperature. They can also be combined to cater for high water demand in properties with three or more bathrooms. In this scenario, two boilers would work together to ensure a rapid re-supply of hot water despite the large volumes of water involved.

Solar compatible All our regular boilers are compatible with our Greenskies solar water heating systems which can help to reduce your energy bills whilst also benefitting the environment.

Greenstar Ri (12kW to 24kW) Gas Boiler overview.

Greenstar Ri (12kW to 24kW) Gas Boiler Our Greenstar Ri boiler is a compact, wall mounted boiler that is perfect for small and medium sized homes. It is also perfect for replacing a boiler in an existing system.

Small enough to be installed in a standard kitchen cupboard, the boiler can be used with our range of high efficiency Greenstore cylinders for a complete Worcester system solution for your home.



  • Fits in a standard kitchen cupboard
  • Simple boiler control knob
  • Suitable for homes where the heating system includes a hot water storage cylinder
  • Frost protection is also included, reducing frost risk if installed in a garage or loft
  • Can be used with Greenskies solar panels for energy and cost savings
Greenstar Ri (12kW to 24kW) Gas Boiler

Greenstar Ri (12kW to 24kW) Gas Boiler

Greenstar Ri (27kW and 30kW) Gas Boiler overview.

Greenstar Ri (27kW and 30kW) Gas Boiler Our higher output Greenstar Ri boiler is a compact, wall mounted boiler that is perfect for medium and large-sized homes.

Small enough to be installed in a standard kitchen cupboard, this boiler can be used with our range of high efficiency Greenstore cylinders for a complete Worcester system solution for your home.



  • Fits in a standard kitchen cupboard
  • Simple boiler control knob
  • User-friendly displays for ease of use
  • Can be used with Greenskies solar panels for energy and cost savings
  • Choice of controls enables greater comfort and economy*
Greenstar Ri (27kW and 30kW) Gas Boiler

Greenstar Ri (27kW and 30kW) Gas Boiler

Greenstar CDi Classic Regular Gas Boiler overview.

Greenstar CDi Classic Regular Gas Boiler Our Greenstar CDi Classic Regular boiler is our top performing boiler with impressive heating outputs making it an excellent choice for larger homes.

This boiler can be used with our range of high efficiency Greenstore cylinders allowing stored hot water to be rapidly replenished.



  • Highest central heating output of the wall-hung Greenstar regular boiler range
  • Stored hot water can be rapidly replenished with high output options
  • Our CDi Classic has set the heating industry benchmark for efficiency, helping to reduce energy usage
  • Simple boiler control knob with temperature display
  • Large Condensesure style siphon built into the boiler - eliminates frost risk*
Greenstar CDi Classic Regular Gas Boiler

Greenstar CDi Classic Regular Gas Boiler

Greenstar CDi FS Regular Gas Boiler overview.

Greenstar CDi FS Regular Gas Boiler Our Greenstar FS CDi Regular is a perfect replacement for an older floor standing boiler in a larger property.

This boiler can be used with our range of high efficiency Greenstore cylinders allowing stored hot water to be rapidly replenished.



  • Fits underneath a standard kitchen worktop
  • Stored hot water can be rapidly replenished with high output options
  • Simple boiler control knobs with temperature display
  • Can be used with Greenskies solar panels for energy and cost savings
Greenstar CDi FS Regular Gas Boiler

Greenstar CDi FS Regular Gas Boiler

Overview