Gas boilers

All our Greenstar gas boilers are condensing boilers and run at 90% efficiency or over.

The condensing gas boilers are listed below. Combi boilers provide heating and hot water directly from the boiler. Regular and system boilers heat your central heating system and produce hot water for your cylinder.

If you’d like to know which boiler would suit your requirements please use our Find a Boiler search.

Find a boiler

Combi

What is a
Combi boiler?

Click here to find out more Combi

Enlarge image

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

Regular

What is a
Regular boiler?

Click here to find out more Regular

Enlarge image

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