Worcester Green Star is one of the leading boiler manufacturers and has the making efficient boilers for many years. There are a large number of boilers with the range and we have listed the most popular models with the for your information.

Listing of current regular boilers for Worcester listed in declining SEDBUK rating order.

Worcester: Greenstar R : 28 HE System
gas : regular : condensing : wall mounted
Power Rating: (27.7 – 27.7 kW)
SEDBUK efficiency 90.7%

Worcester: Greenstar R : 29 HE Conventional
gas : regular : condensing : wall mounted
Power Rating: (27.7 – 27.7 kW)
SEDBUK efficiency 90.7%

Worcester: Greenstar 29HE Conventional : ZB 7-29
gas : regular : condensing : wall mounted
Power Rating: (29 – 29 kW)
SEDBUK efficiency 90.7%

Worcester: Greenstar Cdi : 30 Cdi Conventional
gas : regular : condensing : wall mounted
Power Rating: (30.0 – 30.0 kW)
SEDBUK efficiency 90.3%

Worcester: Greenstar Cdi : 30 Cdi System
gas : regular : condensing : wall mounted
Power Rating: (30.0 – 30.0 kW)
SEDBUK efficiency 90.3%

Worcester: Greenstar : 24 Ri
gas : regular : condensing : wall mounted
Power Rating: (24 – 24 kW)
SEDBUK efficiency 90.2%

Worcester: Greenstar Cdi : 40 Cdi Conventional
gas : regular : condensing : wall mounted
Power Rating: (40.8 – 40.8 kW)
SEDBUK efficiency 90.2%

Worcester: Greenstar : 24i System
gas : regular : condensing : wall mounted
Power Rating: (24 – 24 kW)
SEDBUK efficiency 90.2%

Worcester: Greenstar R : 40 HE Conventional
gas : regular : condensing : wall mounted
Power Rating: (40.0 – 40.0 kW)
SEDBUK efficiency 90.1%

Worcester: Greenstar : 12 Ri
gas : regular : condensing : wall mounted
Power Rating: (12.00 – 12.00 kW)
SEDBUK efficiency 90.1%

Worcester: Greenstar : 12i System
gas : regular : condensing : wall mounted
Power Rating: (12 – 12 kW)
SEDBUK efficiency 90.1%

Worcester: Greenstar : 18Ri
gas : regular : condensing : wall mounted
Power Rating: (18.00 – 18.00 kW)
SEDBUK efficiency 90.1%

Worcester: Greenstar : 15Ri
gas : regular : condensing : wall mounted
Power Rating: (15.00 – 15.00 kW)
SEDBUK efficiency 90.1%

Worcester: 14/19 CBi : RSF
gas : regular : non condensing : wall mounted
Power Rating: (14 – 19.05 kW)
SEDBUK efficiency 79.4%

Worcester: 15 Sbi : RSF
gas : regular : non condensing : wall mounted
Power Rating: (6 – 15 kW)
SEDBUK efficiency 79.1%

Worcester: 9/14 CBi : RSF
gas : regular : non condensing : wall mounted
Power Rating: (9 – 14 kW)
SEDBUK efficiency 78.5%

Worcester: 19/24 CBi : RSF
gas : regular : non condensing : wall mounted
Power Rating: (19.05 – 23.45 kW)
SEDBUK efficiency 78.4%

Worcester: 24 Sbi : RSF
gas : regular : non condensing : wall mounted
Power Rating: (15 – 24 kW)
SEDBUK efficiency 78.3%

This information has been collated from Manufacturers literature and the SEDBUK online database as at April 2007.

Small variations in efficiency ratings are not significant. It can be assumed that a 3% difference in rating will give a 95% confidence that the higher rated boiler is more efficient than the lower.


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