Want to get an idea which boiler would suit your needs before contacting an installer? Answer a few questions about your home or find out which boiler can directly replace your current one.


Greenstar i

Greenstar i

  • Our most popular combi boiler
  • Suitable for small to medium homes
  • Fills a standard kitchen sink in 45 seconds*
  • Gas
  • Combi
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Greenstar CDi Classic

Greenstar CDi Classic

  • Our top of the range high performance combi boiler
  • Suitable for larger homes with one or two bathrooms
  • Fills a standard kitchen sink in 32 seconds*
  • Gas
  • Combi
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Greenstar Si Compact

Greenstar Si Compact

  • Our space saving combi boiler that fits within a standard kitchen cupboard
  • Suitable for small to medium homes
  • Fills a standard kitchen sink in 45 seconds*
  • Gas
  • Combi
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Greenstar CDi Compact

Greenstar CDi Compact

  • Our space saving combi boiler that fits within a standard kitchen cupboard
  • Suitable for homes with more than one bathroom
  • Fills a standard kitchen sink in 37 seconds*
  • Gas
  • Combi
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Greenstar CDi Highflow

Greenstar CDi Highflow

  • Our ultra high performance floorstanding combi boiler
  • Designed for larger two bathroom homes
  • Fills a standard kitchen sink in 19 seconds*
  • Gas
  • Combi
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Greenstar Heatslave II

Greenstar Heatslave II

  • UK's most popular oil combi boiler
  • Suitable for small, medium and large sized homes
  • Fills a kitchen sink in 22 seconds*
  • Oil
  • Combi
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Greenstar Heatslave II External

Greenstar Heatslave II External

  • UK's most popular oil external boiler
  • Suitable for small, medium and large sized homes
  • Fills a kitchen sink in 22 seconds*
  • Oil
  • Combi
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* For the highest output boiler in the range to fill an 8L capacity sink bowl based on raising the cold main temperature by 40°C without any flow restriction at the taps or in the pipework.

Find a local installer

Each heating system needs custom designing. Find and contact a Worcester Accredited Installer in your area to book a home visit.

After calculating the best system for your home and hot water requirements, your installer will then provide you with a free quote.

Did you know?

Your new boiler is protected by a no quibble guarantee which you can extend to up to 10 years. Terms & Conditions apply.