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Worcester Bosch Greenstar Si Compact Combi Boilers

To purchase the Worcester Bosch Greenstar Si Compact Combi Boiler, you will need to spend between £1,028.40 and £1,142.46 including VAT and excluding installation.

Worcester Bosch Greenstar Si Compact Combi Boilers

The Greenstar Si Compact Combi by Worcester Bosch is a powerful wall-mounted combination boiler with small dimensions that measure 690mm (H) x 390mm (W) x 280mm (D).

By being so compact, it can be sited in a number of locations within your home and can fit in a standard kitchen cupboard. This boiler will also provide heating and instant hot water without the need for a cold water tank or hot water cylinder, which is great news if your home has limited storage space.

Available in two heating outputs including 25kW and 30kW, this boiler is ideal for apartments, bungalows and smaller houses. The Greenstar Si Compact Combi includes a 5-year manufacturer warranty and a 10-year guarantee of the primary heat exchanger, and prices range from £1,028.40 to £1,142.46.

Boiler Energy Efficiency Credentials

Small and lightweight, the Greenstar Si Compact Combi is SEDBUK A rated with an official energy efficiency rating of over 90%. Not only is the boiler Energy Saving Trust recommended but it is also an environmentally friendly product thanks to its lox NOx and CO2 emissions. This model features a clever ECO mode to override the included ‘keep hot’ function so the boiler does not waste energy and only provides hot water only when it is needed. It also has a low energy pump to reduce electrical usage and is compatible with a huge range of optional Worcester controls to improve performance and efficiency. For example, when installed with a Wave smart internet connected control, the boiler achieves an A+ efficiency rating.

Greenstar Si Compact Combi Technology and Main Advantages

This high performing combi boiler features uncomplicated controls and a user-friendly display to allow you to effortlessly adjust heating temperatures and hot water. It has a ‘keep hot’ facility to ensure hot water is always available, along with the energy-saving ECO mode button we mentioned above.

Worcester Bosch has included frost protection so you don’t have to worry about frost risk if you decide to keep the boiler in your loft or garage. This appliance also comes with 7 pre-plumb connections to enable your installer to pre-plumb the boiler before it is placed on the wall, as well as a wall-mounting jig to help make installation quick and tidy.

And since this model is a combi, it can provide instant hot water because it heats water from the mains, rather than a water storage tank.

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

There are actually two models within the Greenstar Si Compact Combi range, with the smaller providing a heat output of 25kW and the slightly larger delivering 30kW. Whilst the former offers 10.2 litres of hot water per minute, the more powerful of the two can produce 12.3. With this in mind, the 25Si combi is best suited to a small property with around 9 radiators and 1 bathroom, and the 30Si is ideal for a small to medium-sized home with up to 10 radiators and 1 bathroom. Please note that this information won’t be accurate for every property, and you must ask a Gas Safe engineer to assess your heating and hot water usage habits before spending any money on a new boiler.

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MODELTYPE DIMENSIONSMAX FLOW RATOUTPUTEFFICIENCY TYPICAL PRICE
Worcestershire Bosch Greenstar Si Compact Combi 25CombiH - 690 mm
W - 390 mm
D - 280 mm
10.21 25 KW£ 1,028.40
Worcestershire Bosch Greenstar Si Compact Combi 30CombiH - 690 mm
W - 390 mm
D - 280 mm
12.3 30 KW£ 1,142.46

KEY FEATURES & BENEFITS

Compact and lightweightCan be placed almost anywhere in the home
A-rated conventional boilerSave 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 warrantyConfidence and peace of mind
10-year guarantee on heat exchangerExtra peace of mind

Our Honest Opinion of the Worcester Bosch Greenstar Si Compact Combi

Worcester Bosch’s Greenstar Si Compact Combi is a fantastic little boiler that allows you to manage your heating and hot water, which is all down to its simple yet neat controls. Whilst it isn’t powerful enough to meet the needs of a demanding household, it can provide instant hot water and excellent heat no matter the time of day or night.

Remember, this boiler is very small and can be sited in a kitchen cupboard so you shouldn’t ever struggle to find space for it. Also, you can forget about having to find room for tanks and cylinders because this appliance does all the hard work by itself.

Although the boiler is energy efficient without extra accessories, fuel consumption and energy bills can be reduced further with optional controls – and performance can be improved as well. We’re talking about Worcester Bosch room thermostats, mechanical timers, and digital programmers, which also help to boost end-user comfort levels.

If you live in a smaller property with only 1 bathroom and are looking for an A-rated compact boiler that is backed by a generous warranty, the Greenstar Si Compact Combi ticks all the boxes and more.

Advice on Boiler Quotes and Gas Safe Engineers

When obtaining quotes on the Worcester Bosch Greenstar Si Compact Combi, always liaise with local and national installers to ensure you get the best deals available. Also, ask for a fixed price so you aren’t faced with any hidden charges when the work is complete. In addition to this, you must make sure your chosen engineer is Gas Safe registered because this is now a legal requirement. You can check this by viewing their ID card or seeing whether they are listed on the Gas Safe Register website.

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