Greenstar i System (9kW to 24kW) Professional

Greenstar i System (9kW to 24kW) overview

Our Greenstar i System is our most popular wall-mounted system boiler with outputs up to 24kW.

Suitable for a wide range of homes, this boiler comes with a steel wall-mounting jig that not only allows pipes to go behind the boiler but also the ability to pre-pipe all of the pipework before the boiler is placed on the wall.

The appliance can be used with our range of high efficiency Greenstore cylinders.

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

Standard Guarantee

7 Year

With any Greenstar System Filter

8 Year

With any Greenstar System Filter + £40 (Non-WAI loyalty members only)*

10 year

*Available to loyalty scheme members only. Non-WAI’s can achieve this extended guarantee length with an additional payment of £40. Terms and conditions apply.

Features & Benefits

Wall mounting jig providing pre-plumbing and rear piping as standard	Low lift weight	Single panel front for ease of removal
Central heating flow temperatures can be adjusted using simple up/down button	Plug & play optional Worcester controls available*	Fan can be removed with just one screw and the expansion tank is now inside the boiler
Large siphon inside - eliminates risk of condensate pipe freezing †	Achieves an A+ ErP efficiency rating for heating when installed with a Wave smart internet connected control (Excludes 9kW variant)	Commissioning information for easier completion of the Benchmark checklist
Homeowner service reminder	Scan and register the boiler using our free MyWorcester App

Technical details

Greenstar 9i System LPG

Part number: 7 733 600 033
ErP Efficiency Rating: A
ErP Data Sheet: ErP Data Sheet
Fuel Type: Gas (LPG)
Control Options
EasyControl Compatible ¹
Solar Compatible
Central heating output (kW): 9.2
Dimensions (mm) height x width x depth: 710 x 400 x 330
Clearances (mm) above, sides, below and front: 30, 5, 200, 600
Maximum horizontal flue (mm): 4600
Maximum vertical flue (mm): 6400
Ingress protection rating: IP20
Minimum inlet pressure (bar): N/A
Lift weight (kg): N/A

Greenstar 9i System

Part number: 7 733 600 011
ErP Efficiency Rating: A
ErP Data Sheet: ErP Data Sheet
Fuel Type: Gas (NG)
Control Options
EasyControl Compatible ¹
Solar Compatible
Central heating output (kW): 9.2
Dimensions (mm) height x width x depth: 710 x 400 x 330
Clearances (mm) above, sides, below and front: 30, 5, 200, 600
Maximum horizontal flue (mm): 4600
Maximum vertical flue (mm): 6400
Ingress protection rating: IP20
Minimum inlet pressure (bar): N/A
Lift weight (kg): 30.9

Greenstar 12i System LPG

Part number: 7 733 600 034
ErP Efficiency Rating: A
ErP Data Sheet: ErP Data Sheet
Fuel Type: Gas (LPG)
Control Options
EasyControl Compatible ¹
Solar Compatible
Central heating output (kW): 12.2
Dimensions (mm) height x width x depth: 710 x 400 x 330
Clearances (mm) above, sides, below and front: 30, 5, 200, 600
Maximum horizontal flue (mm): 4600
Maximum vertical flue (mm): 6400
Ingress protection rating: IP20
Minimum inlet pressure (bar): N/A
Lift weight (kg): N/A

Greenstar 12i System

Part number: 7 733 600 010
ErP Efficiency Rating: A
ErP Data Sheet: ErP Data Sheet
Fuel Type: Gas (NG)
Control Options
EasyControl Compatible ¹
Solar Compatible
Central heating output (kW): 12.2
Dimensions (mm) height x width x depth: 710 x 400 x 330
Clearances (mm) above, sides, below and front: 30, 5, 200, 600
Maximum horizontal flue (mm): 4600
Maximum vertical flue (mm): 6400
Ingress protection rating: IP20
Minimum inlet pressure (bar): N/A
Lift weight (kg): 30.9

Greenstar 15i System

Part number: 7 733 600 009
ErP Efficiency Rating: A
ErP Data Sheet: ErP Data Sheet
Fuel Type: Gas (NG)
Control Options
EasyControl Compatible ¹
Solar Compatible
Central heating output (kW): 15.3
Dimensions (mm) height x width x depth: 710 x 400 x 330
Clearances (mm) above, sides, below and front: 30, 5, 200, 600
Maximum horizontal flue (mm): 4600
Maximum vertical flue (mm): 6400
Ingress protection rating: IP20
Minimum inlet pressure (bar): N/A
Lift weight (kg): 30.9

Greenstar 15i System LPG

Part number: 7 733 600 035
ErP Efficiency Rating: A
ErP Data Sheet: ErP Data Sheet
Fuel Type: Gas (LPG)
Control Options
EasyControl Compatible ¹
Solar Compatible
Central heating output (kW): 15.3
Dimensions (mm) height x width x depth: 710 x 400 x 330
Clearances (mm) above, sides, below and front: 30, 5, 200, 600
Maximum horizontal flue (mm): 4600
Maximum vertical flue (mm): 6400
Ingress protection rating: IP20
Minimum inlet pressure (bar): N/A
Lift weight (kg): N/A

Greenstar 18i System LPG

Part number: 7 733 600 036
ErP Efficiency Rating: A
ErP Data Sheet: ErP Data Sheet
Fuel Type: Gas (LPG)
Control Options
EasyControl Compatible ¹
Solar Compatible
Central heating output (kW): 18.4
Dimensions (mm) height x width x depth: 710 x 400 x 330
Clearances (mm) above, sides, below and front: 30, 5, 200, 600
Maximum horizontal flue (mm): 4600
Maximum vertical flue (mm): 6400
Ingress protection rating: IP20
Minimum inlet pressure (bar): N/A
Lift weight (kg): N/A

Greenstar 18i System

Part number: 7 733 600 008
ErP Efficiency Rating: A
ErP Data Sheet: ErP Data Sheet
Fuel Type: Gas (NG)
Control Options
EasyControl Compatible ¹
Solar Compatible
Central heating output (kW): 18.4
Dimensions (mm) height x width x depth: 710 x 400 x 330
Clearances (mm) above, sides, below and front: 30, 5, 200, 600
Maximum horizontal flue (mm): 4600
Maximum vertical flue (mm): 6400
Ingress protection rating: IP20
Minimum inlet pressure (bar): N/A
Lift weight (kg): 30.9

Greenstar 21i System LPG

Part number: 7 733 600 037
ErP Efficiency Rating: A
ErP Data Sheet: ErP Data Sheet
Fuel Type: Gas (LPG)
Control Options
EasyControl Compatible ¹
Solar Compatible
Central heating output (kW): 21.6
Dimensions (mm) height x width x depth: 710 x 400 x 330
Clearances (mm) above, sides, below and front: 30, 5, 200, 600
Maximum horizontal flue (mm): 4600
Maximum vertical flue (mm): 6400
Ingress protection rating: IP20
Minimum inlet pressure (bar): N/A
Lift weight (kg): N/A

Greenstar 21i System

Part number: 7 733 600 007
ErP Efficiency Rating: A
ErP Data Sheet: ErP Data Sheet
Fuel Type: Gas (NG)
Control Options
EasyControl Compatible ¹
Solar Compatible
Central heating output (kW): 21.6
Dimensions (mm) height x width x depth: 710 x 400 x 330
Clearances (mm) above, sides, below and front: 30, 5, 200, 600
Maximum horizontal flue (mm): 4600
Maximum vertical flue (mm): 6400
Ingress protection rating: IP20
Minimum inlet pressure (bar): N/A
Lift weight (kg): 30.9

Greenstar 24i System LPG

Part number: 7 733 600 038
ErP Efficiency Rating: A
ErP Data Sheet: ErP Data Sheet
Fuel Type: Gas (LPG)
Control Options
EasyControl Compatible ¹
Solar Compatible
Central heating output (kW): 24.6
Dimensions (mm) height x width x depth: 710 x 400 x 330
Clearances (mm) above, sides, below and front: 30, 5, 200, 600
Maximum horizontal flue (mm): 4600
Maximum vertical flue (mm): 6400
Ingress protection rating: IP20
Minimum inlet pressure (bar): N/A
Lift weight (kg): N/A

Greenstar 24i System

Part number: 7 733 600 006
ErP Efficiency Rating: A
ErP Data Sheet: ErP Data Sheet
Fuel Type: Gas (NG)
Control Options
EasyControl Compatible ¹
Solar Compatible
Central heating output (kW): 24.6
Dimensions (mm) height x width x depth: 710 x 400 x 330
Clearances (mm) above, sides, below and front: 30, 5, 200, 600
Maximum horizontal flue (mm): 4600
Maximum vertical flue (mm): 6400
Ingress protection rating: IP20
Minimum inlet pressure (bar): N/A
Lift weight (kg): 30.9

*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

Related Accessories

	Part number
Security fixing kit	7 716 192 261

Boiler Accessories	Part number
Greenstar Comfort wall mounting plate	7 733 600 039
Remote pressure relief valve kit	7 716 161 071
Below boiler pipe cover	7 716 192 608
Earth bonding strip	7 716 192 686
Greenstar i System ErP internal diverter valve kit	7 733 600 089
Heat exchanger cleaning kit	7 733 600 091
ISM1 Intelligent Solar Module	7 716 192 068
CondenseSure	7 716 192 746
EasyControl Adapter	7 736 701 560	Installation Manual

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
High level horizontal telescopic 60/100mm flue kit	7 733 600 0482
Support bracket 6 pack (100mm dia.)	7 716 191 178
Support bracket (125mm dia.)	7 716 191 179
Support bracket kit (100mm dia.)	7 716 191 177
Long telescopic flue kit (100mm dia.) - wall hung boilers	7 716 191 171	WallHung	Gas
90º bend (125mm dia.)	7 719 003 664
45 degree bend (80/125mm dia.)	7 719 003 665
1000mm extension (125mm dia.)	7 719 003 666
Horizontal flue kit (125mm dia.)	7 719 003 7022
Support bracket kit 6 pack (100mm dia.)	7 716 191 173
Support bracket kit (125mm dia.)	7 716 191 174
90º elbow 60/100	7 719 002 348
60/100mm (x2) 45º bends	7 716 191 085
Vertical BF kit (125mm)	7 719 002 4312
Vertical BF kit (100mm)	7 719 002 4302
High level horizontal flue adaptor (125mm dia)	7 719 002 433
High level horizontal flue adaptor (100mm dia)	7 719 002 432
2m flue extension (100mm dia.)	7 716 191 172
Short flue extension, 220mm (100mm dia)	7 716 191 133
Support bracket kit (100mm dia)	7 716 191 092
90º bend (100mm dia.)	7 716 191 084
1000mm extension kit (100mm dia.)	7 716 191 083
Standard telescopic horizontal flue kit (100mm dia)	7 716 191 0822	WallHung	Gas
Standard Telescopic Flue & Terminal (White)	7 716 191 082	WallHung	Gas	Installation Manual

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

Want to learn more?

Introducing the Greenstar Comfort Controls
Introducing the new EasyControl
ErP Easy as ABC

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