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Excellent 4.8 out of 5

Worcester Bosch Greenstar Heatslave II 25/32 Combi Oil Boiler

Worcester Bosch Greenstar Heatslave II 25/32 Combi Oil Boiler Boiler
Typical Price (inc VAT)
£2,350
Typical installation Cost (inc VAT)*
£1000 - £1500
Sundries (Filter, Flue, etc)
£300
Total Cost
£3,650 - £4,150

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Make Worcester Bosch
Model Greenstar Heatslave II 25/32 Combi Oil Boiler
Is Condensing Condensing
Efficiency Rating 91%
Band Rating A Rated
LPG Compatible No
Standard Warranty Up to 5 Years
Central Heating Max. Output 32 kW
Mounting Floor Standing
Flow Rate 22 l/m
Typical Price (inc VAT) £2,350
Typical installation Cost (inc VAT)* £1000 - £1500
Sundries (Filter, Flue, etc) £300
Total Cost £3,650 - £4,150
ERP Rating A Heat B water
Hot Water Max. Output 32 kW

* This is a guide price for a straightforward, like-for-like boiler replacement. Installation costs will vary dependent on work required.

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Greenstar Heatslave II 25/32 Combi Oil Boiler

Designed and manufactured by Worcester Bosch, the Greenstar Heatslave II 25/32 is a compact combi oil boiler with a powerful output rating of 32 kW.

How efficient is the Greenstar Heatslave II 25/32?

For anyone looking to reduce their heating bills then the Heatslave II 25/32 has a high efficiency rating of 90.3% and ErP A-rating for heat.

Is the output rating suitable for my home?

With an output rating of 32 kW, this unit is best suited to properties with 2 bathrooms and around 15-20 radiators.

What options are available?

This 25/32 is the most powerful model in the Greenstar Heatslave II range so if you live in a smaller property then 18 kW and 25 kW models are also available. For even larger properties there are system and regular Heatslave II units.

Is a combi boiler suitable for my home?

Combi boilers deliver hot water on demand by heating the water directly from the mains. This hot water goes straight to the tap rather than being stored in a cylinder which is how system and regular boilers work. While this is great for saving space, it does mean that they’re unable to deliver high volumes of water to more than one tap at a time - making them better suited to smaller homes.

How long is the warranty?

The Greenstar Heatslave II 25/32 has a 2 year warranty as standard which can be extended to 5 years when certain terms and conditions are met.

What are the key features of the Greenstar Heatslave II 25/32 combi boiler?

Some key features of the Greenstar Heatslave II include heating controls that can be concealed in a drawer, a eco hot water mode to increase efficiency and compact dimensions which means that it won’t take up much space.

How big is the Greenstar Heatslave II combi?

Greenstar Heatslave II combi boilers are compact, thanks to dimensions of 855 x 520 x 600mm (HxWxD), so they can be installed under a standard kitchen worktop.

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Excellent 4.8 out of 5
Excellent 4.8 out of 5

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