Gas boilers

Our Greenstar gas boilers are highly efficient and for the second year running scooped 23 Which? Best Buys. In addition, Worcester was voted the most popular gas boiler brand among Which? members.

5 year guarantee on selected boilers

Greenstar CDi and Si combi boilers, and Ri regular boilers, purchased and installed before 30th June 2013 are eligible for a 5 year guarantee (terms and conditions apply).

Find information on Greenstar gas boilers below, or, use our Find a Boiler search to see which is the best boiler to suit your needs.

Find a gas boiler

• Efficiency rating
• EST registered
• LPG boiler available
• Solar compatible

Combi gas boilers

Product	Features
Greenstar 42CDi Classic	90.2% A
Greenstar 38CDi Classic	90.2% A
Greenstar 34CDi Classic	90.1% A
Greenstar 29CDi Classic	90.1% A
Greenstar 36CDi Compact	90.5% A
Greenstar 32CDi Compact	90.5% A
Greenstar 28CDi Compact	90.5% A
Greenstar 30Si	90.1% A
Greenstar 25Si	90.1% A
Greenstar 28i Junior	90.1% A
Greenstar 24i Junior	90.1% A
Greenstar Highflow 550CDi	90.4% A
Greenstar Highflow 440CDi	90.4% A

Regular gas boilers

Product	Features
Greenstar 40CDi Classic Regular	90.2% A
Greenstar 30CDi Classic Regular	90.3% A
Greenstar FS 42CDi Regular	90.3% A
Greenstar FS 30CDi Regular	90.5% A
Greenstar 24Ri	90.2% A
Greenstar 18Ri	90.1% A
Greenstar 15Ri	90.1% A
Greenstar 12Ri	90.1% A

System gas boilers

Product	Features
Greenstar 30CDi Classic System	90.3% A
Greenstar 24i System	90.2% A
Greenstar 18i System	90.1% A
Greenstar 15i System	90.1% A
Greenstar 12i System	90.1% A