A quick test to see which boiler is right for you.

1. Find a Boiler That Suits You
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2. What Type of Fuel Do You Use?
Gas LPG
Liquid Petroleum Gas
Oil
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3. What Type of Boiler Do You Need?
Combi Regular/System I Don’t Know?
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4. What Type of Boiler Do You Need?
Combi Regular/System I Don’t Know?
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5. What Type of Boiler Do You Need?
Combi Regular/System I Don’t Know?
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6. How Many Bedrooms Are In Your Home?
1 to 3 4 to 5 More Than 6
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7. How Many Bedrooms Are In Your Home?
1 to 3 4 to 5 More Than 6
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8. How Many Bedrooms Are In Your Home?
1 to 3 4 to 5 More Than 6
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9. How Many Bedrooms Are In Your Home?
1 to 3 4 to 5 More Than 6
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10. How Many Bedrooms Are In Your Home?
1 to 3 4 to 5 More Than 6
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11. How Many Bedrooms Are In Your Home?
1 to 3 4 to 5 More Than 6
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12. How Many Bedrooms Are In Your Home?
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1 to 3 4 to 5 More Than 6
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13. How Many Bedrooms Are In Your Home?
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1 to 3 4 to 5 More Than 6
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14. How Many Bathrooms Are In Your Home?
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1 Bathroom 2 Bathrooms1 Bathroom
+ A Second Shower Room
More Than 2
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15. How Many Bathrooms Are In Your Home?
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1 Bathroom 2 Bathrooms1 Bathroom
+ A Second Shower Room
More Than 2
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16. How Many Bathrooms Are In Your Home?
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1 Bathroom 2 Bathrooms1 Bathroom
+ A Second Shower Room
More Than 2
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17. How Many Bathrooms Are In Your Home?
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1 Bathroom 2 Bathrooms1 Bathroom
+ A Second Shower Room
More Than 2
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18. How Many Bathrooms Are In Your Home?
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1 Bathroom 2 Bathrooms1 Bathroom
+ A Second Shower Room
More Than 2
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19. How Many Bathrooms Are In Your Home?
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1 Bathroom 2 Bathrooms1 Bathroom
+ A Second Shower Room
More Than 2
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20. How Many Bathrooms Are In Your Home?
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1 Bathroom 2 Bathrooms1 Bathroom
+ A Second Shower Room
More Than 2
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21. How Many Bathrooms Are In Your Home?
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1 Bathroom 2 Bathrooms1 Bathroom
+ A Second Shower Room
More Than 2
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22. How Many Bathrooms Are In Your Home?
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1 Bathroom 2 Bathrooms1 Bathroom
+ A Second Shower Room
More Than 2
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23. How Many Bathrooms Are In Your Home?
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1 Bathroom 2 Bathrooms1 Bathroom
+ A Second Shower Room
More Than 2
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24. How Many Bathrooms Are In Your Home?
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1 Bathroom 2 Bathrooms1 Bathroom
+ A Second Shower Room
More Than 2
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25. How Many Bathrooms Are In Your Home?
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1 Bathroom 2 Bathrooms1 Bathroom
+ A Second Shower Room
More Than 2
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26. How Many Bathrooms Are In Your Home?
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1 Bathroom 2 Bathrooms1 Bathroom
+ A Second Shower Room
More Than 2
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27. How Many Bathrooms Are In Your Home?
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1 Bathroom 2 Bathrooms1 Bathroom
+ A Second Shower Room
More Than 2
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28. How Many Bathrooms Are In Your Home?
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1 Bathroom 2 Bathrooms1 Bathroom
+ A Second Shower Room
More Than 2
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29. How Many Bathrooms Are In Your Home?
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1 Bathroom 2 Bathrooms1 Bathroom
+ A Second Shower Room
More Than 2
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30. How Many Bathrooms Are In Your Home?
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1 Bathroom 2 Bathrooms1 Bathroom
+ A Second Shower Room
More Than 2
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31. How Many Bathrooms Are In Your Home?
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1 Bathroom 2 Bathrooms1 Bathroom
+ A Second Shower Room
More Than 2
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32. Where Will Your Oil Boiler Be Sited?
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Garage/
Utility
Room
OutdoorsKitchen Wall-mounted
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33. Where Will Your Oil Boiler Be Sited?
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Garage/
Utility
Room
OutdoorsKitchen Wall-mounted
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34. Where Will Your Oil Boiler Be Sited?
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Garage/
Utility
Room
OutdoorsKitchen Wall-mounted
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35. Where Will Your Oil Boiler Be Sited?
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Garage/
Utility
Room
OutdoorsKitchen Wall-mounted
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36. Where Will Your Oil Boiler Be Sited?
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Garage/
Utility
Room
OutdoorsKitchen Wall-mounted
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37. Where Will Your Oil Boiler Be Sited?
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Garage/
Utility
Room
OutdoorsKitchen Wall-mounted
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38. Where Will Your Oil Boiler Be Sited?
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Garage/
Utility
Room
OutdoorsKitchen Wall-mounted
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39. Where Will Your Oil Boiler Be Sited?
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Garage/
Utility
Room
OutdoorsKitchen Wall-mounted
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40. Where Will Your Oil Boiler Be Sited?
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Garage/
Utility
Room
OutdoorsKitchen Wall-mounted
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41. Where Will Your Oil Boiler Be Sited?
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Garage/
Utility
Room
OutdoorsKitchen Wall-mounted
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42. Where Will Your Oil Boiler Be Sited?
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Garage/
Utility
Room
OutdoorsKitchen Wall-mounted
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43. Where Will Your Oil Boiler Be Sited?
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Garage/
Utility
Room
OutdoorsKitchen Wall-mounted
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44. Where Will Your Oil Boiler Be Sited?
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Garage/
Utility
Room
OutdoorsKitchen Wall-mounted
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45. Where Will Your Oil Boiler Be Sited?
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Garage/
Utility
Room
OutdoorsKitchen Wall-mounted
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46. Where Will Your Oil Boiler Be Sited?
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Garage/
Utility
Room
OutdoorsKitchen Wall-mounted
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47. Where Will Your Oil Boiler Be Sited?
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Garage/
Utility
Room
OutdoorsKitchen Wall-mounted
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48. Where Will Your Oil Boiler Be Sited?
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Garage/
Utility
Room
OutdoorsKitchen Wall-mounted
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49. Where Will Your Oil Boiler Be Sited?
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Garage/
Utility
Room
OutdoorsKitchen Wall-mounted
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50. Where Will Your Oil Boiler Be Sited?
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Garage/
Utility
Room
OutdoorsKitchen Wall-mounted
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51. Where Will Your Oil Boiler Be Sited?
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Garage/
Utility
Room
OutdoorsKitchen Wall-mounted
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52. Where Will Your Oil Boiler Be Sited?
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Garage/
Utility
Room
OutdoorsKitchen Wall-mounted
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53. Where Will Your Oil Boiler Be Sited?
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Garage/
Utility
Room
OutdoorsKitchen Wall-mounted
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54. Where Will Your Oil Boiler Be Sited?
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Garage/
Utility
Room
OutdoorsKitchen Wall-mounted
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55. Where Will Your Oil Boiler Be Sited?
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Garage/
Utility
Room
OutdoorsKitchen Wall-mounted
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56. We Recommend This Boiler
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Greenstar 24i Junior
With more than 1 million Greenstar i Juniors already installed, the award-winning boiler
series is already well-established in the UK.
Compact in size and with domestic hot water outputs of up to 28kW, the Greenstar i
Junior is ideal for apartments and small to medium-sized properties with one
bathroom.
For further peace of mind, the Greenstar i Junior has been awarded a Which? Best
Buy accreditation for the second year running and has undergone a series of
enhancements including the addition of a domestic hot water control to the boiler
fascia.
10 year guarantee on primary heat exchanger and 5 year guarantee on the plate heat
exchanger.
Central heating output: 24kW
Domestic hot water flow rate: 9.8 litres per minute at 35 degree temperature rise
(provided adequate mains pressure is available)
Designed operational flow rate 8.6 litres per minutes at 40 degree temperature rise.
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57. We Recommend This Boiler
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Greenstar 34CDi Classic
Greenstar CDi Classic gas combi boilers are our top of the range boilers.
They offer the widest choice of features within our gas boiler range, including the ability
to control both the hot water and central heating temperatures, providing the ultimate in
performance, economy and user convenience.
Greenstar CDi Classic combi boilers are unique in that they condense in both heating
and hot water modes, resulting in greater efficiency and fuel savings.
10 year guarantee on primary heat exchanger.
Central heating output: 30kW
Domestic hot water flow rate: 14.3 litres per minute at 35 degree temperature rise
(provided adequate mains pressure is available)
Designed operational flow rate 12 litres per minutes at 40 degree temperature rise.
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58. We Recommend This Boiler
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Greenstar 42CDi Classic
Greenstar CDi Classic gas combi boilers are our top of the range boilers.
They offer the widest choice of features within our gas boiler range, including the ability
to control both the hot water and central heating temperatures, providing the ultimate in
performance, economy and user convenience.
Greenstar CDi Classic combi boilers are unique in that they condense in both heating
and hot water modes, resulting in greater efficiency and fuel savings.
The higher outputs of Greenstar CDi boilers can be suitable for larger properties with
more than one bathroom.
10 year guarantee on primary heat exchanger.
Central heating output: 30kW
Domestic hot water flow rate: 17.2 litres per minute at 35 degree temperature rise
(provided adequate mains water pressure is available)
Designed operational flow rate 15 litres per minutes at 40 degree temperature rise.
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59. We Recommend This Boiler
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Greenstar Highflow 550CDi
The Greenstar Highflow CDi combi boilers are floor-standing. These boilers have been
specifically developed for larger two bathroom properties where there is a heavier
requirement for heating and hot water.
Greenstar Highflow CDi boilers incorporate many of the operating features of our wall-
mounted combis and can be used with mechanical, digital, wireless and new-
generation intelligent controls.
For further peace of mind, every boiler in Worcester’s Greenstar gas and LPG
condensing boiler range has been awarded a Which? Best Buy accreditation.
10 year guarantee on primary heat exchanger.
Central heating output: 30kW
Domestic hot water flow rate: 25 litres per minute at 30 degree temperature rise
(provided adequate mains pressure is available)
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60. We Recommend This Boiler
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Greenstar 38CDi Classic
Greenstar CDi Classic gas combi boilers are our top of the range boilers.
They offer the widest choice of features within our gas boiler range, including the ability
to control both the hot water and central heating temperatures, providing the ultimate in
performance, economy and user convenience.
Greenstar CDi Classic combi boilers are unique in that they condense in both heating
and hot water modes, resulting in greater efficiency and fuel savings.
The higher outputs of Greenstar CDi boilers can be suitable for larger properties with
more than one bathroom.
10 year guarantee on primary heat exchanger.
Central heating output: 30kW
Domestic hot water flow rate: 16.4 litres per minute at 35 degree temperature rise
(provided adequate mains pressure is available)
Designed operational flow rate 14 litres per minutes at 40 degree temperature rise.
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61. We Recommend This Boiler
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Greenstar 30CDi Classic
The Greenstar 30CDi Classic System boiler is our top performing system boiler. It’s
suited to bigger properties with a larger heating requirement.
The boiler is compatible with a wide range of optional controls, offering you superb
flexibility with your heating and hot water times and temperatures.
The Greenstar CDi Classic System boiler offers the ultimate in energy savings when
combined with our new generation intelligent controls and our Greenskies solar water
heating panels.
For further peace of mind, every boiler in Worcester’s Greenstar gas and LPG
condensing boiler range has been awarded a Which? Best Buy accreditation.
10 year guarantee on primary heat exchanger.
Central heating output: 30kW
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62. We Recommend This Boiler
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Greenstar 12Ri
The Greenstar Ri regular boilers are the smallest of our condensing boilers - they can
even be installed within a standard kitchen cabinet.
These boilers are available in 4 different outputs which means that there’s one to suit
small, medium and larger properties. The Greenstar Ri Regular boilers are used with a
heating system that includes stored hot water in a cylinder.
The Greenstar Ri boilers have a fascia-mounted heating temperature control knob and
neon operational status indicator.
For further peace of mind, every boiler in Worcester’s Greenstar gas and LPG
condensing boiler range has been awarded a Which? Best Buy accreditation.
10 year guarantee on primary heat exchanger.
Central heating output: 12kW
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63. We Recommend This Boiler
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Greenstar 15Ri
The Greenstar Ri regular boilers are the smallest of our condensing boilers - they can
even be installed within a standard kitchen cabinet.
These boilers are available in 4 different outputs which means that there’s one to suit
small, medium and larger properties. The Greenstar Ri Regular boilers are used with a
heating system that includes stored hot water in a cylinder.
The Greenstar Ri boilers have a fascia-mounted heating temperature control knob and
neon operational status indicator.
For further peace of mind, every boiler in Worcester’s Greenstar gas and LPG
condensing boiler range has been awarded a Which? Best Buy accreditation.
10 year guarantee on primary heat exchanger.
Central heating output: 15kW
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64. We Recommend This Boiler
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Greenstar 24Ri
The Greenstar Ri Regular boilers are the smallest of our condensing boilers - they can
even be installed within a standard kitchen cabinet.
These boilers are available in 4 different outputs which means that there’s one to suit
small, medium and larger properties. The Greenstar Ri Regular boilers are used with a
heating system that includes stored hot water in a cylinder.
The Greenstar Ri boilers have a fascia-mounted heating temperature control knob and
neon operational status indicator.
For further peace of mind, every boiler in Worcester’s Greenstar gas and LPG
condensing boiler range has been awarded a Which? Best Buy accreditation.
10 year guarantee on primary heat exchanger.
Central heating output: 24kW
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65. We Recommend This Boiler
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Greenstar 30CDi Classic Regular
The Greenstar CDi Classic Regular boilers are our top performing wall-mounted
regular boilers. Their impressive heating outputs make them an excellent choice for
installation in larger properties.
These boilers have a built-in fascia-mounted heating temperature control knob and a
neon operational status indicator.
For further peace of mind, every boiler in Worcester’s Greenstar gas and LPG
condensing boiler range has been awarded a Which? Best Buy accreditation.
Image of 5 year guarantee logo (with extra padding)5 year boiler guarantee until 30th
June 2013 (terms and conditions apply). See promo page for details.
10 year guarantee on primary heat exchanger.
Central heating output: 30kW
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66. We Recommend This Boiler
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Greenstar 30CDi Classic System
The Greenstar 30CDi Classic System boiler is our top performing system boiler. It’s
suited to bigger properties with a larger heating requirement.
The boiler is compatible with a wide range of optional controls, offering you superb
flexibility with your heating and hot water times and temperatures.
The Greenstar CDi Classic System boiler offers the ultimate in energy savings when
combined with our new generation intelligent controls and our Greenskies solar water
heating panels.
For further peace of mind, every boiler in Worcester’s Greenstar gas and LPG
condensing boiler range has been awarded a Which? Best Buy accreditation.
10 year guarantee on primary heat exchanger.
Central heating output: 30kW
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67. We Recommend This Boiler
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Greenstar 40CDi Classic Regular
The Greenstar CDi Classic Regular boilers are our top performing wall-mounted
regular boilers. Their impressive heating outputs make them an excellent choice for
installation in larger properties.
These boilers have a built-in fascia-mounted heating temperature control knob and a
neon operational status indicator.
For further peace of mind, every boiler in Worcester’s Greenstar gas and LPG
condensing boiler range has been awarded a Which? Best Buy accreditation.
10 year guarantee on primary heat exchanger.
Central heating output: 40.8kW
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68. We Recommend This Boiler
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GB162 65kW
The GB162 65kW can automatically modulate its output down to less than 20% in
order to precisely match the demand for heat. This reduces fuel consumption and
improves overall seasonal efficiency considerably.
It’s fully compatible with the Energy Management System (EMS) modular controls
platform, optimising performance by keeping the boiler in condensing mode for as long
as possible. EMS also provides comprehensive heating system functionality and
ensures minimal energy usage at all times.
NOx (at 0% oxygen, dry mg/kWh): 28
Net efficiency (temperatures of 50/30°C): 108.0%
Seasonal efficiency (as L2B): 95.5%
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