Greenstar i System (9kW to 24kW) overview

Our Greenstar i System boiler is our most popular system boiler that is suitable for small to medium sized homes.

This boiler can also be used with our high efficiency Greenstore cylinders for a complete Worcester system solution for your home.

Download our easy guide, which covers everything you need to know about the Greenstar i System (9kW to 24kW)

  • Simple boiler controls with clear information display
  • Suitable for homes where the heating system includes a hot water storage cylinder
  • Choice of controls enables greater comfort and economy*
  • Can be used with Greenskies solar panels for energy and cost savings
  • Low energy pump reduces electrical usage
  • Large Condensesure style siphon built into the boiler - eliminates frost risk**

Greenstar i System (9kW to 24kW) Greenstar i System (9kW to 24kW)
Greenstar i System (9kW to 24kW) Greenstar i System (9kW to 24kW)
Download ErP Data Sheet

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Technical Details

Greenstar 9i System Greenstar 12i System Greenstar 15i System Greenstar 18i System Greenstar 21i System Greenstar 24i System
ErP Efficiency Rating
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A
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ErP Data Sheet ErP Data Sheet ErP Data Sheet ErP Data Sheet ErP Data Sheet ErP Data Sheet ErP Data Sheet
LPG model available
Wave Compatible *
Solar Compatible
Control Options
Central heating output (kW) 9 12 15 18 21 24
Dimensions (mm) height x width x depth 710 x 400 x 330 710 x 400 x 330 710 x 400 x 330 710 x 400 x 330 710 x 400 x 330 710 x 400 x 330

*With installation of optional built-in diverter valve

**The Condensesure Siphon has been proven to be effective at preventing frozen condensate at -15°C for a sustained period of 48 hours. 32mm pipework must be used and should not exceed 3 metre

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