The Greenstar Si boiler series is part of a market-leading range of energy-saving condensing gas-fired boilers from Worcester. They can cut heating and hot water bills by between 15-20% - and they’re up to 30% cheaper to run than an older boiler.

Greenstar condensing boilers deliver this energy-saving performance by recycling exhaust gases to extract and re-use latent heat - a highly efficient use of energy which also significantly reduces carbon dioxide in the atmosphere.

• SEDBUK* A-rated efficiency - environmentally friendly
• 25kW and 30kW domestic hot water (DHW) outputs
• Hot water and central heating temperature controls - consumer comfort and flexibility
• Mechanical, digital and radio frequency (RF) control options all available
• Optimising 7-day programmable room thermostat available
• Compact dimensions – space saving and siting flexibility
• Keep hot facility - instantly available hot water
• Includes wall mounting frame for optional vertical pipework routing- no additional wall spacing frame required
• Low NOx and CO₂ emissions - environmentally friendly
• 2 year** warranty with 10 year** warranty on primary heat exchanger