Worcester Bosch Greenstar 35CDi Classic System

(2 customer reviews)


Upgrade your heating system with the reliable and energy-efficient Worcester Bosch Greenstar 35CDi Classic System gas boiler, designed to keep your home warm and comfortable all year round.

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Worcester Bosch, one of the leading manufacturers of heating and hot water systems, offers a wide range of boilers to suit the needs of different households. Among its impressive line-up is the Greenstar 35CDi Classic Systemgas boiler that boasts high efficiency, reliability, and ease of use.

This gas boiler is designed to heat water in a sealed central heating system and is ideal for larger homes with multiple bathrooms. It boasts an impressive output of 35kW, making it capable of delivering hot water to a shower or multiple taps at the same time. The Greenstar 35CDi Classic Systemgas boiler comes with a variety of features that make it one of the best on the market:

Efficiency: The Greenstar 35CDi Classic Systemgas boiler is one of the most efficient gas boilers available. With an efficiency rating of 94%, it is designed to save you money on your energy bills by reducing your gas consumption.

Combi conversion: The Greenstar 35CDi Classic Systemgas boiler can be converted into a combi boiler, meaning it can heat water for both the central heating and hot water systems from a single unit. The combi conversion kit can be installed at any time to suit your needs.

Ease of use: The Greenstar 35CDi Classic Systemgas boiler has easy-to-use controls with clear displays, allowing you to control your heating and hot water with ease. The unit also comes with a range of features such as frost protection, multiple temperature settings, and a timer for added convenience.

Reliability: Worcester Bosch is known for producing reliable heating and hot water products, and the Greenstar 35CDi Classic Systemgas boiler is no exception. It is built to last and comes with a 5-year warranty as standard, providing you with peace of mind and protection against any faults or defects.

Overall, the Worcester Bosch Greenstar 35CDi Classic Systemgas boiler is an excellent choice for those looking for a reliable, efficient, and easy-to-use heating and hot water system. With its impressive features and high-quality design, it is a solid investment for any home in need of a new gas boiler.

Gas Boilers, Display, A

Worcester Bosch Greenstar 35CDi Classic System properties

Product nameGreenstar 35CDi Classic System
TypeGas Boilers
Energy Class LabelA
Noise Level58.0 dB
Efficiency Level92.0 %
Heating Effect Gas35.0 kW
Height760.0 mm
Width440.0 mm
Depth360.0 mm

Additional information

Product name


Energy Class Label


Noise Level

Efficiency Level

Heating Effect Gas




2 reviews for Worcester Bosch Greenstar 35CDi Classic System

  1. Brad P

    The boiler has an output of 35 kW, and is ideal for a larger home. Works great as a supplier of heating and hot water for two bathrooms.
    When it comes to energy savings, I haven’t noticed any major changes in bills. Its great advantage is antifreeze protection, so I could install it in a cell near the house.

  2. Zoe

    Oh, the Worcester Bosch Greenstar 35CDi Classic System, a gas boiler with a depth of 360.0 mm – that’s quite a lot of space to heat up water for all those people from Boston who are always cold! It’s like having a swimming pool full of hot water in your living room, am I right? You know, some people think they can just install this bad boy themselves with their amateur plumbing skills – but let me tell you, that’s like trying to cook a gourmet meal using only a microwave. It’s not going to end well. On the other hand, professionals who use the Greenstar 35CDi Classic System can make it sing, like a trained opera singer hitting all the right notes – or perhaps more accurately, like an experienced chef creating a perfectly cooked meal that leaves you wanting more. So if you want your home heating experience to be as smooth as silk, leave it to the pros to handle your Worcester Bosch Greenstar 35CDi Classic System. And remember, even though it’s got a depth of 360.0 mm, you can still fit it in most standard-sized living rooms – although I must admit, it does add an interesting conversation piece for all your guests!

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Frequently Asked Questions:

What is the recommended service interval for my Worcester Bosch Greenstar 35CDi Classic System boiler?

The recommended service interval for a Worcester Bosch Greenstar 35CDi Classic System Boiler is typically once a year, or as specified in the product manual provided by the manufacturer. Regular servicing helps to maintain optimal performance and efficiency, ensure safe operation, and prolong the lifespan of your boiler. It's essential to follow the manufacturer's guidelines and have the service performed by a qualified professional.

How do I properly install and maintain my Worcester Bosch Greenstar 35CDi Classic System boiler?

The Worcester Bosch Greenstar 35CDi Classic System boiler is a highly efficient central heating system that provides reliable and consistent performance. To ensure the longevity and optimal performance of your boiler, proper installation and regular maintenance are essential. In this guide, we will provide you with step-by-step instructions on how to install and maintain your Worcester Bosch Greenstar 35CDi Classic System boiler. Installation:

1. Before starting the installation process, ensure that you have all the necessary tools and materials required for the job. These include a flange adaptor, copper pipe, flexible hoses, radiator valves, a thermostat, and a magnetic filter. The first step is to prepare the installation area by removing the old boiler and any associated pipes and fittings. Make sure you have enough space around the boiler to allow for easy access during installation and future maintenance. Next, install the new Greenstar 35CDi Classic System boiler in a suitable location, preferably against an external wall or in a well-ventilated area. The boiler should be leveled and secured using the supplied fixings. Connect the mains water supply to the boiler using a flange adaptor. Ensure that you use a high-quality adaptor to prevent any leaks or issues with water flow. Connect the return pipe from your central heating system to the boiler's return header. Make sure the connections are tight and secure, and use a radiator valve to regulate the water flow. Install the thermostat in a suitable location, preferably on an outside wall near the boiler. Connect the thermostat wires to the boiler control panel using the provided terminals. Finally, connect the magnetic filter to the system pipework, located between the boiler and the pump. This will help to prevent any debris or sediment from entering the system, ensuring optimal performance and longevity. Maintenance:

1. Regularly check the boiler's water levels and top up as necessary using a measuring cylinder. Low water levels can cause damage to the boiler and reduce its efficiency. Inspect the boiler's flue for any signs of damage or wear, such as cracks or leaks. This is essential to prevent carbon monoxide poisoning and ensure safe operation. Check the expansion vessel for any signs of leakage or damage. The expansion vessel helps to regulate water pressure in the system and must be in good working order. Clean the boiler's heat exchanger annually using a descaler solution. This will remove any build-up of limescale or debris, improving efficiency and preventing breakdowns. Inspect the magnetic filter regularly to ensure it is functioning correctly. Clean or replace the filter as necessary to prevent any blockages or restrictive flow issues. Check the pump for any signs of wear or damage, such as leaks or noise. If you notice any issues, replace the pump immediately to prevent further damage and potential breakdowns. Finally, schedule an annual service with a qualified engineer to ensure your boiler is operating at peak efficiency and prevent any potential issues. This will also help to maintain its warranty and longevity. By following these installation and maintenance guidelines, you can ensure the optimal performance and longevity of your Worcester Bosch Greenstar 35CDi Classic System boiler. Remember to always prioritize safety and follow all manufacturer's instructions for proper operation.

How to setup Worcester Bosch Greenstar 35CDi Classic System heating boiler?

If you purchased your Worcester Bosch Greenstar 35CDi Classic System heating boiler and are wondering how to optimize its operation so that it works ecologically and economically we invite you to read our article about the heating curve.

What is a heating effect of Worcester Bosch Greenstar 35CDi Classic System?

This gas boiler has the power of 35.0 kW. If your house is old-fashioned or lacks insulation, this boiler will be enough for 194 square meters of space. However, if your home is modern and insulated this boiler will be enough for 350 square meters of space. If your house is within this range, check also the other gas boilers in our offer, the power of which is 35.0 kW.