gasSafeLogoR vaillant_logo

© Copyright Fast Flow Gas Services Ltd - Company Reg. 8480526 - V.A.T Reg.164994167.


Call Lee on 07828879334

Fast Flow Gas Services Ltd


Vaillant | Worcester | Ideal Vogue | Ideal | Glowworm | Alpha | Boiler replacement | New boiler | Boiler breakdown | Boiler installation | Central heating | Plumbing | Gas safe |Plumber Havant | Portsmoth | Emsworth | Fareham | Southampton | Basinstoke | Reading | Slough | Bognor | Petersfield | Guildford | London | Boiler leak | Gas leak | Water leak |

Power Flush | Radiators | Gas engineer Portsmouth | Plumber Portsmouth | Ideal installer | Worcester installer | Vaillant installer | Best boilers supplied and installed | Fast flow |

Facebook circle blue large Twitter circle blue large

Worcester Combi Boiler Range

Our Greenstar i combi boiler is ideal for small to medium sized homes with one bathroom.


New to 2015, and replacing a well-established award-winning boiler that has been installed in over 1 million homes across the UK, our latest model now has a user friendly control that allows you to adjust your heating and hot water to meet your exact requirement.


Image of 5 year guarantee logo (with extra padding)5 year boiler guarantee as standard (terms and conditions apply)


10 year guarantee on primary heat exchanger and 5 year guarantee on the plate heat exchanger.



The ErP Directive is a new EU regulation designed to drive improvements in the efficiency of heating and hot water products. Most boilers will fall within the A band, meaning they achieve more than 90% seasonal efficiency, while renewable technologies such as heat pumps will likely be in the A+ or A++ bands.

Worcester Junior Combi Boilers

Greenstar 25 I Greenstar 30 I

Worcester CDI Classic Combi Boilers

A rated efficiency (SAP 2005 seasonal efficiency)

Fully condensing in both central heating and domestic hot water modes

Keep hot facility - instantly available hot water

Extremely small standby electrical output of 3.5W - energy efficient

Wall mounting frame allows pipework to be hidden from view


Low NOx and CO2 emissions - environmentally friendly


5 year boiler guarantee terms and conditions apply (standard guarantee: 2 years)

10 year guarantee on primary heat exchanger

5 year anti-scale guarantee on domestic hot water heat exchanger


Hot water and central heating temperatures can be controlled


Multi-directional fluing means boiler can be sited in a wider variety of places

Mechanical, digital and new generation intelligent controls all compatible

Heat load and flow generated precisely to meet the heating system’s requirements using a modulating pump

29 CDI Classic Combi 34 CDI Classic Combi 38 CDI Classic Combi 42 CDI Classic Combi

Worcester CDI Compact And SI Compact Combi Boilers

Simple and intelligent control options available, optimising boiler efficiency and fuel consumption

Condenses in central heating and domestic hot water modes for optimum efficiency during operation

Comfort and ECO modes to suit hot water delivery needs

Fully modulating pump for reduced electricity consumption and quieter operation

Built-in frost protection of the boiler and the surrounding pipes

5 year boiler guarantee terms and conditions apply (standard guarantee: 2 years)

5 year guarantee on plate heat exchanger*

10 year guarantee on Worcester primary heat exchanger*

Boiler protection plans available


Environmental benefits

New: hot water pre-heat feature allows it to be used in conjunction with other heat sources, such as Greenskies solar thermal (additional accessory is required)

A rated efficiency of 90.5% (SAP 2005 seasonal efficiency)

Ability to fix a maximum heating temperature – meaning no matter how much you turn the dial, the temperature will not exceed maximum setting

Precision engineered WB7 heat exchanger reduces raw material usage during manufacturing

All boilers and components are 100% recyclable

Low electrical standby consumption

Achieves 3 credits under the Code for Sustainable Homes

28 CDI Compact Boiler 32 CDI Compact Boiler 36 CDI Compact Boiler 25 SI Compact Boiler 30 SI Compact Boiler Worcester 28cdi