Gas boilers

Our Greenstar gas boilers are all 90% efficient or more and every boiler listed here has been awarded a Which? Best Buy accreditation.

Greenstar CDi and Si combi boilers purchased and installed between 1st September 2011 and 31st March 2012 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	90.2% A
Greenstar 37CDi	90.2% A
Greenstar 30CDi	90.2% A
Greenstar 27CDi	90.2% 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

System gas boilers

Product	Features
Greenstar 30CDi 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

Regular gas boilers

Product	Features
Greenstar 40CDi Regular	90.2% A
Greenstar 30CDi 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