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    Worcester Bosch Greenstar CDi Compact Combi Boilers

    Worcester Bosch Greenstar CDi Compact Combi Boilers typically cost between £1,105.04 and £1,358.76 including VAT and excluding installation.

    Worcester Bosch Greenstar CDi Compact Combi Boilers

    Small enough to fit within a standard kitchen cupboard, the Greenstar CDi Compact Combi is a great option for homes with limited space.

    The boilers extremely small dimensions measure 680mm (H) x 390mm (W) x 280mm (D), and this unit does not need to be used with a hot water cylinder or cold water storage tank. This energy efficient model is designed to suit a variety of homes and is available in three output including 28kW, 32kW and 36kW.

    The Greenstar CDi Compact Combi range includes solutions for small, medium and large-sized properties and is priced between £1,105.04 and £1,358.76. Regardless of which output level you choose, the boiler will come with a 5-year manufacturer warranty and a 10-year guarantee on the primary heat exchanger.

    Boiler Energy Efficiency Credentials

    With an efficiency rating over 90.1%, the Greenstar CDi Compact Combi is a SEDBUK A-rated boiler and an Energy Saving Trust recommended appliance. It boasts 100% recyclable components and an ErP compliant pump that moves the boiler into standby mode to reduce electrical consumption. Although the boiler delivers high levels of efficiency and can cut your fuel bills without the use of optional accessories, it will achieve an A+ rating when installed with a Wave smart internet connected control. You can also choose from a wide range of other intelligent controls to improve both comfort and economy.

    Greenstar CDi Compact Combi Technology and Main Advantages

    Designed to provide high levels of operating efficiency, the Greenstar CDi Compact Combi features a ‘keep hot’ facility to ensure hot water is always instantly available. It has an ECO mode as well, which can override the ‘keep hot’ function when hot water is not required to ensure the appliance uses less gas.

    The Greenstar CDi Compact Combi range includes three output sizes with different maximum hot water flow rates, which are as follows:

    • Greenstar 28CDi Compact Combi – 11.4 litres per minute
    • Greenstar 32CDi Compact Combi – 13.1 litres per minute
    • Greenstar 36CDi Compact Combi – 14.7 litres per minute

    This boiler is easy to operate and adjust thanks to simple controls, and it has a clear temperature display which shows you the current operational status and gives the engineer direct access to commissioning and diagnostics data. Plus, installation is straightforward with a little help from a wall-mounting jig.

    If you decide to install the boiler in your loft or garage, you never need to worry about frost damage because the unit includes frost protection. There is also a low energy modulating pump to reduce noise and electrical usage.

    Is the Greenstar CDi Compact Combi the Right Boiler Type and Size for Your Home?

    Let’s start with the 28CDi Compact Combi. With a 28kW output, this model is ideal for apartments and small houses with up to 8 radiators and 1 bathroom. Then there’s the 32CDi with a 32kW output, which is best suited to a medium-sized home with around 12 radiators, 1 bathroom and 1 ensuite. Lastly, we have the 36CDi which packs more of a punch and is a great choice for large homes with multiple family bathrooms.

    As we always say, this information is just a rough guide, and you should ask a Gas Safe engineer to assess your heating and hot water usage habits before purchasing a Greenstar CDi Compact Combi. Otherwise, you could end up with a boiler that does not satisfy the needs of your household.


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    Compact and lightweight Can be placed almost anywhere in the home
    A-rated combi boiler Save money on your gas bill
    ‘Keep Hot’ function and heating controlUltimate end-user comfort
    ECO mode buttonUses energy only when hot water is needed
    Hot water temperature controlEnd-user comfort and convenience
    Compatible with intelligent controlsAlternative energy and cost savings option
    5-year parts and labour warrantyAlternative energy and cost savings option
    10-year guarantee on heat exchangerExtra peace of mind

    Our Honest Opinion of the Worcester Bosch Greenstar CDi Compact Combi

    Boasting the smallest dimensions of all the Worcester Bosch boilers, the Greenstar CDi Compact Combi can be installed pretty much wherever you wish, which is great news if your home has limited space. Not forgetting the fact that this appliance can run all by itself without any cylinders or tanks.

    The boiler can run using natural gas or LPG (liquefied petroleum gas) and significantly reduce the cost of your energy bills because this model works hard in order not to waste energy. Take the special ECO mode for example. It overrides the ‘keep hot’ facility to ensure the boiler uses energy only when hot water is required – which we think is quite impressive.

    If green credentials are particularly important to you (and so they should be), you can even improve efficiency and save even more money with this boiler by purchasing some additional intelligent Worcester Bosch controls and programmers.

    Despite being such a small boiler, the Greenstar CDi Compact Combi provides exceptional levels of performance and efficiency so it’s hard to say anything negative about this one. We also really like the fact that all of the components are 100% recyclable.

    Advice on Boiler Quotes and Gas Safe Engineers

    Would you like to receive competitive Greenstar CDi Compact Combi quotes? Well, you can start straight away by using our free quote engine. Before you do, remember to compare quotes from local and national installers and ask for a fixed priced on the boiler and fitting work to ensure you avoid any hidden charges. You must also make sure your chosen engineer is legally permitted to carry out gas work, so don’t forget to view their Gas Safe ID card or run a search at the Gas Safe Register website.


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