Worcester Bosch Greenstar 30Si Compact (Combi, Gas)

Designed for small spaces

Your fixed price with installation




Per month 9.9% APR

Finance calculator

  • Gas Safe installation
  • Worcester Bosch 10 year guarantee
  • FREE Honeywell Smart Thermostat RRP £199
  • FREE Worcester Bosch magnetic filter RRP £130
  • Manufacturer recommended Fernox chemical flush
  • New condensate installation (if required)
  • New gas pipe upgrade (if required)
  • Other controls & radiator replacement (upon request)

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

Choose install date

Worcester Bosch, Combi, Natural Gas, Greenstar 30Si Compact




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

Hot water flow rate

  • 12.3 @ 35°c ∆T

Central heating output (kW)

  • 24

Hot water output (kW)

  • 30


10 Year Warranty

Worcester Bosch, Combi, Natural Gas, Greenstar 30Si Compact highlights

  • Fits perfectly in a kitchen cupboard
  • 10 year warranty
  • FREE Honeywell Smart Thermostat RRP £199.99
  • FREE filter worth up to £130
  • Gas Safe installation
  • Fitting pack

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.