Worcester Bosch claim that the new series of Greenstar i Junior condensing combi boilers are a ground breaking range of energy saving boilers which is good news for the environment and consumers.

Focusing on efficiency the design converts up to 97% of energy consumed into heat compared to 80% for other types of boiler. Accordingly it qualifies for an A rating.

The Worcester Greenstar 24i junior boiler a condensing combi boiler is suitable for a small/medium sized, 1 bath flat, apartment or house.

  • It has a wall mounting frame with pipes behind leaving no exposed pipework.
  • The boiler is environmentally friendly with low NOx and CO2 emissions.
  • For convenience it has a keep hot facility which keeps the primary water within the heat cell hot. This will ensure that hot water is available instantly on opening the hot water tap.
  • If the eco mode is engaged the keep hot facility is de energised and hot water will be heated from cold as required. Whilst this creates a slight delay it does improve the energy efficiency of the system.
  • When the central heating is required the boiler will initially fire at a minimum output gradually increasing its heat generation to meet the requirement. Electronics within the boiler continually monitor this to match power output to domestic requirements.
Worcester Greenstar 24i Junior Ratings
SEDBUK Rating % 90.1 5 stars
Built in Frost Stat Yes 5 stars
Height 700 mm
Width 400 mm
Depth 330 mm
CH Output (kW) 24 kwh 3 stars
Maximimum flow rate 9.8 litre / min 3 stars

Installers will like these boilers also as they are less than 28kg requiring only one person to lift.

There is an optional radio frequency controlled room thermostat which eliminates electrical wiring requirements whilst complying with the electrical wiring regulations.


  

14 Responses to “Greenstar 24i Junior”

  • neil stow says:

    Can you give me an estimate for replacing my boiler with greenstar 24i junior, that is taking out my existing boiler and installing the new one.
    regards
    Neil Stow

  • Boiler Systems says:

    It would be guesswork to quote a price without reviewing the property as the price includes the full installation costs. It is important to ensure that the right type of boiler is selected to meet the needs of your family and that the power rating is matched to your needs. Whilst you have already indicated a preference for the Greenstar 24i Junior the installation costs need to be established, they must comply with the latest regulations which have changed in recent years.

    npower are able to send a Home Energy Consultant to your home to review the installation options and help to confirm the right boiler for your home. This visit is free with no-obligations on your part and will also enable an accurate quotation to be developed for a new boiler.

  • a phagura says:

    is a greenstar 24i junior suitable for a large 3 bed house.
    how many rads will it supply

  • Boiler Systems says:

    The manufacturer recommends that this is suitable for a medium sized apartment or house. Suitability for your property depends upon the output of the radiators which will be determined by their size. It is a 24kw boiler so as long as the heat losses for the property come under the manufacturers recommended reading then this could be suitable.

    npower are able to send a Home Energy Consultant to your home to review the installation options and help to select the right boiler for your home working out the heat losses for your property. This visit is free with no-obligations on your part and will also enable an accurate quotation to be developed for a new boiler.

  • Jim says:

    I want to fit my boiler into a kitchen cupboard unit that measures 720 high, 600 wide and 290 deep. Which would you recommend? (I live in a small 2 bed/1 bath flat and only require hot water for the radiators… the rest comes from a central point in the block of flats for free)..

    I see this boiler is 330 deep… so I guess it is of no use to me? YOur advice is greatly appreciated.

    – Jim

  • Boiler Systems says:

    You could install the Greenstar 18ri or 24ri which are regular boilers ideal for central heating only supply. Their dimensions are as follows : Height – 600mm Depth : 270mm Width : 390mm

  • Patricia Livett says:

    How long should it take to fill an average bath using a Greenstar 24i junior? If you are filling a bath, do the radiators go off as well?
    PL

  • Boiler Systems says:

    The maximum flow rate of the boiler at 35 degrees is 9.8 litres per minute. This depends upon your cold water mains pressure and whether you also have any other hot water taps drawing hot water at the same time.

  • P.V.Taylor says:

    Re-Phagura request May20th. Asked If a 24i junior is suitable for a large 3-bed house.

    you replied in answering, The Manufacturer recommends that this is suitable for a small/medium sized 1 bath flat,apartment or house.

    Can I ask in my ignorance of heating boilers, why this 24i junior would be sufficient enough for the above request.

    Operative word being Large 3-bed house?

  • Boiler Systems says:

    We assume that you mean “why this 24i junior would NOT be sufficient enough for the above request” – a Large 3-bed house

    Combi boilers deliver hot water on demand to the household inhabitants and also drive the central heating hot water supply. The manufacturer tunes the boiler power output for best boiler efficiency against an assumed hot water demand. They then recommend a house ‘size’ to guide would be purchasers.

    Within this guidance there are obviously variations. A small, house could have poor insulation, a radiator in every room and several people living in the house – it would have a large demand on a boiler. A large house could have excellent insulation, a single occupant and radiators only in two or three rooms, this would have a very small hot water demand. In these two illustrations the general manufacturers guidance is not valid.

    To accurately determine the correct boiler for a home a heating survey is required to establish the real heating demand and calculate the homes heat loss statistics. For this reason, rather than giving a quotation based on a guess, npower send a Home Energy Consultant to review the installation options and help to select the right boiler for your home.

    This visit is free with no-obligations on the customer and will also enable an accurate quotation to be developed for a new boiler.

  • Karen Simpson says:

    We are currently building a granny flat onto our existing 3 bed house for my elderly mother. We already have gas central heating and would like to link this to the extension. Can you recommend a boiler that would allow us to use the heating in the extension without having to heat the main house? Many thanks!

  • Boiler Systems says:

    There are many other factors to take into account before recommending a boiler to you and a visit to you property is required to properly answer your question. The size of your family, how you use your home and any planned extensions all play a part.

    To ensure that you select the right boiler npower are able to send a Home Energy Consultant to your home to review the installation options. This visit is free with no-obligations on your part and will also enable an accurate quotation to be developed for a new boiler.

  • Mr Taylor says:

    Would a 24i boiler be suitable for a 3 bed house with 8 radiators and good insulation?

    I have been quoted for a 28i boiler but the 24i is cheaper.

  • Boiler Systems says:

    It depends upon the heat loss calculation for your property – if this is over 24 kw then the 24i junior will not be big enough to cope with the demand from your system.


  

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