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
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
EasyControl 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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