Worcester Bosch Greenstar Danesmoor External Regular

The Worcester Bosch Greenstar Danesmoor External Regular is a floor-standing oil boiler that must be installed outdoors.

Looking for a decent oil-fired boiler? You might want to take a closer look at the Greenstar Danesmoor External Regular by Worcester Bosch. Awarded Which? Best Buy, this conventional oil boiler comes in three outputs to perfectly meet the needs of small, medium and large households that are off the gas grid. It’s A-rated for efficiency and compatible with solar water heating systems, meaning this boiler will not only help to save you money on your energy bills but also ensure you leave a smaller carbon footprint.

How Much Does this Boiler Cost?

It all depends on which kW output you choose. The Worcester Bosch Greenstar Danesmoor External Regular is available in an output of 18kW, 25kW or 32kW, so you’ll need to ask a qualified heating engineer to help you work out which size is best for your home. Having done some research on your behalf, we can tell you that you’ll be looking at paying between £1,800 and £2,250 including VAT for this boiler model. You should shop around though, as the cost will vary from one supplier to another. Also, don’t forget to factor in the cost of installation.

How will I know if this Boiler is Suitable for My Home?

You won’t know for sure without seeking professional advice from an OFTEC registered engineer. What we can tell you is that the Greenstar Danesmoor External Regular requires enough space for a separate hot water storage cylinder (commonly found in the airing cupboard) and a cold water tank in the loft. It may be that you have these additional components already installed at your home because your existing boiler is a regular, conventional or heat-only model.

The boiler comes in three central heating outputs of 18kW, 25kW and 32kW, so there is an option for most small, medium and large-sized homes. If you’re a smaller household with lower demands, you might only need the lower output unit, and a larger home with greater needs will need one of the two higher outputs. Always consult a qualified heating engineer before making any decisions.

Is it a High Efficiency Boiler?

One of the great things about the Worcester Bosch Greenstar Danesmoor External Regular is that it has been given an A ErP rating. So, if you need to replace an old heat-only boiler, you’re bound to save some cash with this modern and highly efficient solution. But that’s not all. This oil boiler can be used with Greenskies solar panels and Greenstore cylinders for further energy and cost savings.

Does this Boiler have a Good Range of Controls and Features?

It sure does. The Greenstar Danesmoor External Regular is supplied with a green powder coasted cabinet to ensure it blends in with your garden. This robust cabinet also helps to protect the boiler from the elements. Other key features include frost protection, an inspection hatch and one-piece baffle for easy servicing. As well as being compatible with Greenskies solar panels and Greenstore cylinders, this oil-fired boiler can be used with the Bosch EasyControl smart connected heating and hot water thermostat. EasyControl gives you complete control over your central heating system and even allows you to turn on and switch off your heating and hot water when you’re not at home.

How long is the Warranty on this Boiler?

All oil-fired boilers from Worcester Bosch come with a 2-year parts and labour warranty as standard, so that’s what you’ll receive when you purchase the Greenstar Danesmoor External Regular. Before purchasing the boiler, check the Worcester Bosch website as it often features promotions that enable you to extend the warranty if the boiler is fitted with a certain part or installed by an accredited installer.

Greenstar Danesmoor External Regular By Size and Price

ModelTypeDimensionsMaximum Flow RateOutputEfficiency RatingTypical Price
Greenstar Danesmoor External Regular 18Heat OnlyH - 950 mm
W - 565 mm
D - 780 mm
N/A18 kWA 90% and above£1800
Greenstar Danesmoor External Regular 25Heat OnlyH - 950 mm
W - 565 mm
D - 780 mm
N/A25 kWA 90% and above£2000
Greenstar Danesmoor External Regular 32Heat OnlyH - 950 mm
W - 565 mm
D - 780 mm
N/A32 kWA 90% and above£2250

Summary of Important Information

  • Priced between £1,800 and £2,250
  • Heating output of 18kW, 25kW or 32kW
  • Dimensions of 950mm (H) x 565mm (W) x 780mm (D)
  • Uses oil as its fuel source
  • Must be situated outside
  • A-rated for efficiency
  • Solar compatible
  • Smart compatible
  • 2-year warranty as standard

Pros and Cons

There aren’t many disadvantages of the Worcester Bosch Greenstar Danesmoor External Regular. You can check out our list of pros and cons below.


  • Awarded Which? Best Buy with a score of 87%
  • Outdoor installation – frees up space indoors
  • Suited to small, medium and large homes without a mains gas supply
  • Weatherproof cabinet
  • Extremely quiet in operation
  • Provides maximum energy efficiency – reduce fuel bills and carbon emissions
  • Compatible with solar thermal – additional savings
  • Compatible with Bosch EasyControl – can tailor hot water times and heating temperatures from your smartphone or tablet, even when you’re not at home
  • 5-year guarantee on the primary heat exchanger
  • 10-year guarantee on the plate heat exchanger


  • Requires separate cylinder and loft tanks
  • 2-year warranty – would prefer a longer standard guarantee

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