*Please note that this boiler has been discontinued by its manufacturers. Click here to view its replacement range.

Worcester Bosch Greenstar 28i Junior

Type Combi boiler
Fuel Gas
Efficiency Rating A
Standard Warranty 5 years
Weight 39.5kg
Width x Height x Depth 400mm x 700mm x 330mm
Max kW Output 28kw
Flow rate 10l/min


The Worcester Bosch Greenstar 28i Junior combi boiler is a popular choice for homes in need of a compact heating solution. With the ability to provide both heating and hot-water without any additional storage tanks or cylinders, this boiler could be suitable if space-saving and energy-efficiency are important for your home.


Get a free online quote  


Product description

The Greenstar 28i Junior combi boiler is generally a suitable choice for most homes with 2-4 bedrooms, up to 15 radiators and 1 bathroom. The most powerful model in its range, this boiler has a 28kW output and is capable of providing flow rates of up to 10l per minute.

Designed to provide high-quality and energy-efficient central heating, this boiler could help you lower your energy wastage with key features such as simple boiler controls and smart thermostat compatibility. Such features could make controlling and monitoring your heating easy to do, potentially helping you reduce your energy bills by providing you with an opportunity to ensure that your heating isn’t being used inefficiently**.

With a standard 5-year manufacturer-backed warranty, you could be provided with added peace of mind in knowing that should a problem arise with this boiler, you could receive a repair or replacement at no cost to you***.


Key Features

  • SEDBUK Band A rating (Energy-efficiency)
  • Smart control compatibility
  • Nox Class 5 (Low greenhouse gas emissions)
  • Keep hot facility – designed to provide instant hot-water
  • 5-year warranty
  • Compact dimensions
  • Designed to have simple boiler controls

*Please note that this boiler has been discontinued by its manufacturers.


Get a free online quote  


Similar Alternative Models

We aim to provide you with a range of boilers to choose from for your home and needs. As the Greenstar 28i Junior combi boiler has been discontinued, here’s a few products that may also be suitable:

1. Worcester Bosch Greenstar 30i Combi

  • A part of the official replacement range for Greenstar Junior boilers
  • Standard 5-year warranty
  • Designed to provide Instantaneous hot-water

2. Ideal Logic+ C30 Combi

  • Compact dimensions
  • Reader Recommended by Good Housekeeping
  • Designed to have boiler frost protection

3. Vaillant EcoTec Pro 28kW Combi

  • A-rated for efficiency
  • Designed to have increased hot-water delivery speed
  • Designed to operate quietly


If you were looking for a Greenstar 28i combi boiler, we could provide you with an alternative option that could effectively and efficiently meet your needs. Try our free quote tool to get a recommendation for a boiler or you could call us and speak to us directly.


Get a free online quote  


*5% online discount is available to domestic gas and LPG customers who receive an online quote for all boiler brands. £50 additional discount available on all like-for-like system swaps excluding Ideal Logic HE24 and HE30 boilers & Ideal Logic HO12 & HO15 boilers and an additional £100 discount is available on conventional to combi, and combi to conventional boiler swaps. Online discounted price is only available for the duration of the 14-day quote validity which starts from the day the quote was given. HomeServe include a filter as part of your quote as this is highly recommended by the boiler manufacturer as a key component in maintaining boiler health, functionality and may potentially be looked upon favourably by manufacturers when assessing warranty work. This filter can be removed at the customer’s request. Quote also includes a Honeywell CM727 programmable thermostat for all combi boiler installations as this is a legal requirement as part of the Boiler + legislation introduced 6th April 2018, and cannot be removed from the installation unless; it is replaced with an alternative smart thermostat; or another energy saving measure as listed in the Boiler + legislation or if an smart thermostat already exists within the property. This offer cannot be used in conjunction with any other offers. HomeServe have the right to withdraw or change the offer at any time. Online discount is automatically applied when the customer gets a quote using the online quote system at www.homeserveboilers.com and as long as the customer meets all the above criteria.


***Subject to an annual service at the customer's expense. 10-year warranty option only available on Worcester Bosch and Ideal gas boilers.

Get your free online boiler quote in just 30 seconds

Answer a few brief questions about the size of your home and energy use and find out how much a brand new boiler could cost in less than 30 seconds. 

Get an online quote