Worcester Bosch
Greenstar 30Si

Designed for small spaces

Your fixed price with installation




Per month APR

  • Gas Safe installation
  • FREE filter worth up to £130
  • FREE system cleanse
  • 10 year warranty
  • Flue - an essential piece of kit worth up to £100
  • Fitting pack
  • All the right safety attachments

Make sure this is the right boiler for you...


Worcester Bosch Greenstar 30Si




  • Height 690mm
  • Depth 280mm
  • Width 390mm

Hot water flow rate

  • 12.3 @ 35°c ∆T

Central heating output (kW)

  • 24

Solar compatible?

  • No


10 Year Warranty

Greenstar 30Si highlights

  • Fits perfectly in a kitchen cupboard
  • 10 year warranty
  • 12.3 litres of hot water per minute
  • Compact and quiet
  • Easy to set a timer using simple controls
  • Low-energy pump
  • Rated A for efficiency

Free with your BOXT

Honeywell Wireless Smart Thermostat RRP £199.99

Get the latest in central heating technology free with all wall-mounted combi boilers from BOXT - it's available as an optional upgrade for other boiler types. Control your central heating from your phone. Adjust room temperatures, set timers or switch the heating on or off, whether you’re in the house or not. It’s easy to do it all from the intuitive touchscreen on the thermostat, too.

Smart thermostat
Free filter

We protect your boiler for free too

We put a FREE filter in every BOXT, worth up to £130 RRP. It filters nasties from the system water to protect the boiler and keeps it in top condition for longer.

Award winning know-how

Worcester Bosch boilers are award winning – they've claimed a Which? Best Buy rosette 7 years running. And with a warrant to supply boilers for the Queen's Sandringham Estate, they keep the royals warm and cosy through Christmas.