Greenstar Si Compact Greenstar Si Compact Greenstar Si Compact
Greenstar Si Compact Greenstar Si Compact Greenstar Si Compact
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Greenstar Si Compact overview

Our Greenstar Si Compact combi boiler is suitable for small to medium sized homes with one bathroom.

With hot water flow rates of up to 12.3 litres/min, the Greenstar Si has a host of design features for ease of installation, use and servicing and can also fit within a standard kitchen cupboard.

Features & Benefits

Wall mounting jig providing pre-plumbing and rear piping as standard
Low lift weight
Fits in a standard kitchen cupboard
Central heating flow and hot water temperatures can be adjusted using simple control knobs
Plug & play optional Worcester controls available
Commissioning information for easier completion of the Benchmark checklist
Clear operational information and diagnostic display
High efficiency and greater reliability with our innovative WB7 heat exchanger
Colour-coded wiring connectors for error free connection and removal
Compatible with CondenseSure accessory - eliminates risk of condensate pipe freezing*
Achieves an A+ ErP package efficiency rating for heating when installed with a Wave smart internet connected control
Scan and register the boiler using our FREE online registration app

Technical Details

Greenstar 25Si Compact Greenstar 30Si Compact
Part number 7 733 600 050 7 733 600 052
ErP Efficiency Rating
A
A
A
A
ErP Data Sheet ErP Data Sheet ErP Data Sheet
Solar Compatible
Wave Compatible
Control Options
Dimensions (mm) height x width x depth 690 x 390 x 280 690 x 390 x 280
Clearances (mm) above, sides, below and front 30, 5, 200, 600 (fixed surface) & 20 (cupboard door) 30, 5, 200, 600 (fixed surface) & 20 (cupboard door)
Maximum horizontal flue (mm) 6000 6000
Maximum vertical flue (mm) 6000 6000
Ingress protection rating X4D X4D
Wall mounting jig supplied
Central heating output (kW) 24 24
Max DHW output (kW) 25 30
Hot water flow rate 35°c ∆T (litres per minute) 10.2l/min 12.3l/min
Hot water flow rate 40°c ∆T (litres per minute) 8.9l/min 10.7l/min
Minimum inlet pressure (bar) 1.6 1.6
NOx emissions (mg/kWh) 35 35
Lift weight (kg) 32.9 32.9

*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 metres in length

Related Accessories

Boiler Accessories Part number
Greenstar Comfort wall mounting plate 7 733 600 039
CondenseSure 7 716 192 746
Flue Gas Heat Recovery Unit 7 733 600 047 Installation Manual
Keyless Filling Link 7 716 192 610
Below boiler pipe cover 7 716 192 608
Flashing Kits Part number
Pitched roof flashing kit (100mm & 125mm dia) 7 716 191 091
Flat roof flashing kit (100mm & 125mm dia.) 7 716 191 090
Flue Part number
90º bend (125mm dia.) 7 719 003 664
45 degree bend (100mm dia.) 7 719 003 665
Horizontal flue kit (125mm dia.) 7 719 003 702
Long telescopic flue kit (100mm dia.) 7 716 191 171
Support bracket kit (100mm dia.) 7 716 191 177
High level horizontal telescopic 60/100mm flue kit 7 733 600 048
Support bracket 6 pack (100mm dia.) 7 716 191 178
Support bracket (125mm dia.) 7 716 191 179
60/100mm (x2) 45º bends 7 716 191 085
Vertical BF kit (125mm) 7 719 002 431
Short flue extension, 220mm (100mm dia) 7 716 191 133
90º bend (100mm dia.) 7 716 191 084
1000mm extension kit (100mm dia.) 7 716 191 083
2m flue extension (100mm dia.) 7 716 191 172
High level horizontal flue adaptor (100mm dia) 7 719 002 432
Vertical BF kit (100mm) 7 719 002 430
High level horizontal flue adaptor (125mm dia) 7 719 002 433
Standard telescopic horizontal flue kit (100mm dia) 7 716 191 082
Plume Part number
Plume management kit (60mm dia) 7 716 191 086
Plume management terminal guard round (60mm dia.) 7 716 191 176
90º bend 7 716 191 088
45º bend (x2) 7 716 191 089

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