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Posted 13 May 2024

Worcester Bosch Greenstar 1000 24Kw Combi Boiler, Horizontal Flue & Pro1 Filter - Free C&C Only

£752.39
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trills
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One of their May Mega Deals.

The Worcester Greenstar 1000 GR1000W 24 C NG is Worcester Bosch's most price competitive combi boiler, suitable for apartments and small-medium homes with the requirement to simultaneously deliver hot water for one bath and one shower. The compact, cupboard fit design ensures ease of installation even in smaller dwellings, whilst still delivering ErP A-rated levels of efficiency, alongside excellent reliability, underlined by a competitive 5-year guarantee when fitted with any filter. Designed to be accessible for all, the Greenstar 1000 offers every home greater choice and the opportunity to have a market leading Worcester Bosch boiler.
Boiler Installation made easy, with our lightest ever lift weight at just 26.7kg, in-line hydraulic connections and easily accessible instaler PRV connection
Compact design, easily fitting within a standard 300mm-deep kitchen cupboard.
Rear piping accessories available, providing complete flexibility for installation.
A range of cost-saving features including Quick Tap water saving functionality and a competitive 1:5 modulation range to minimise gas consumption when fitted with load compensating controls
The most price-competitive Worcester Bosch boiler on the market, supported by a 5-year guarantee
Technical specification
Years Guaranteed 5 years
Width 395mm
Height 655mm
ERP Rating A
Depth 285mm
Range Description
Greenstar 1000
Manufacturer Model No
GS100024KWPK3
Brand Name Worcester Bosch
City Plumbing More details at
Community Updates
Edited by trills, 13 May 2024
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202 Comments

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  1. ChilliPakoda's avatar
    Too small..
    Idela for 1 bed flat or studio
    Chz's avatar
    It's plenty for heating. Most UK houses can get by on 16kW for central heating easily. 24 is on the low side for Hot Water, but really it just means a slower filling bath and you wouldn't need larger unless you have two showers that run together. At 24kW, it should heat anything short of a mansion and it's down to how many baths you have.
  2. foo.bar's avatar
    Does any installer install this? I have always been told by plumbers they wont install boiler I buy.
    BSNLPOOL's avatar
    Because they make a fortune ripping off customers, adding 500 quid on top of the boiler price plus whatever they charge for installation. Find a local honest plumber (a rare breed), and they'll have no problems fitting it.
  3. PS2035's avatar
    If your house is suitable and you're looking to replace a boiler I recommend speaking to Octopus Energy to arrange a survey and get a quote for a heat pump, as the deals are remarkable compared to the price of a new gas boiler plus any ancillary work. They can give a quote over the phone I think, subject to the survey.

    Two neighbours have had them installed since December and with the £7,500 government subsidy one paid £1,300 and another £3,000 odd. For that they had larger radiators installed, and existing Mega Flow hot water tanks were replaced. A team of 5 or six spent four days on each install plus a fifth day checking everything.
    P-A1XAKS's avatar
    I was just about to post the exact same thing, I'm getting one through them for £2,700 all in, new water tank, heat pump, new radiators. Bargain.

    My friend got a quote on his new build and was only £500 total for his
  4. al355's avatar
    I heard the 1000 series are no good from my installer. He recommended the 4000 series, albeit a fair bit more expensive it comes with 10 year warranty
  5. Superficial's avatar
    Had a Worscester Greenstar 28i since 2015 and it's been perfect.

    It's always the same in these threads - a regular contingent of know-nothings knocking Worcester and ignoring the reviews...Worcester are still the top recommended brand according to Which.

    I found it hilarious a year or so ago when this debate was had as usual and an actual boiler repairer came into the thread and said even the expensive brands use the same parts and that he'd seen the proof not just through experience but had visited the factories.
    Newbold's avatar
    As you say, always the same - a load of people with preconceived ideas commenting about something they know absolutely nothing about but like to pretend they do.
  6. trills's avatar
    Author
    I estimate the filter and flue to be worth approximately £150 so £600 for the boiler.
  7. bazray's avatar
    Heat for the price, it looks like its fairly easy to work on so should keep future labour costs down.
    ahotukdeal's avatar
    In the inevitable moment that it will need repair after repair?
  8. CynicalNurse's avatar
    If you have old radiators might be worth looking at the heat pump scheme. Ours are all 30 years old so cost to replace boiler and radiators was high. Cost for 10kW heat pump, twelve new radiators and new hot water cylinder was £3,300 after £7,500 government grant. Was looking at the best part of £5,000 for a gas replacement.

    Obviously for a simple swap. This will be cheaper.
    picachio's avatar
    Was thinking exactly same , I need to replace 30 yrs old radiators and condensing boiler and tank . Do you think heat pump would be a cheaper option ? Would be great if you could share your experience
  9. sheffield788's avatar
    Good price and hot. It is amazing how cheap these are in comparison with a price after installation.
    We wanted our old Baxi moved in the corner of the kitchen. Only 2m distance in comparison with its initial location. Most plumbers refused to do it, as if it breaks, they don't want to take full responsibility. We found a plumber who was willing to move it for £1,600 or to supply and fit a new one in the new place for £2,800. Most plumbers gave us a quote between £2.5-3k for a new supplied and fitted boiler. That involved new pipes from the gas meter, pipes in the ceiling, electric, etc. e-On gave us a quote £3k with 2 years interest free. We needed finance, as we were in the process of extending our new kitchen, so we had no money left. Eventually, we paid a much higher cost, 4k to British Gas for a Vaillant 5 year warranty. But it is 4 year interest free.
    My point is you pay under 1k for a boiler, but with the installation, you pay 3 times more. That's ridiculous. It is 1 day of work at the most...But there is supply and demand. We contacted the company who fitted our previous boiler, and with the boiler supplied by them, the waiting time was 6 months. A very lucrative job, so they charge high prices.
    My parents paid £1,000 in Eastern Europe for a new Bosch and that included fitting as well. (edited)
    RifleEyes's avatar
    You learnt all of that but still paid £4k to British Gas for a 5 year warranty Vaillant? That's ridiculous.

    Stark comparison here but paid £5k for a 10 year warranty (+ Option to increase to 12) Veissmann, 32kw. Every single radiator replaced for a double radiator in a 4 bed house, removal of all 15mm copper pipe, replaced with 25mm all for £5k. (Was about 18 months or so ago now so imagine as with everything this would be a bit more now though!) (edited)
  10. aviva's avatar
    Worcester is a below average boiler these days. Only the 4000 15kW model impresses (not the larger ones). For larger households, the Viessmann V200 remains the gold standard for efficiency and performance! (edited)
  11. Ouzoherb's avatar
    I used boxt and they gave a very competitive price and have absolutely brilliant customer service. An example was I changed the installation date and due to an error some of the parts weren't delivered so it took 2 days to finish. Boxt paid the installer and extra days wage and also gave me a 300 refund for the delay.
  12. Jonmurgie's avatar
    Lots of boiler experts on here today... any recommendations for a 2 bed / 1 bath / 4 radiator bungalow?
    potterbrock's avatar
    Hardly any boilers will modulate that low.
    Maybe a viesmann 100 or intergas xclusive.
    But the preferred option if you have garden space would be ASHP.
  13. FrostyGlovez's avatar
    Never know what to do with regards to our boiler as hear stories reinforcing if it isn't broke don't fix it. Glow worm 30cx installed in 2007. Last service they said numbers show it's operating exactly how it should and to be fair it does work well. Plumber also said unlikely to save any money worth mentioning on gas efficiency of a new one as mine is A+ rated. But everyone seems to think I am mad for also not replacing it considering it is 17years old, maybe just wait for it to stop working is the answer (edited)
    C.D's avatar
    I agree, if it works OK and operates efficiently, then leave it till a costly/unfixable repair makes your decision for you
  14. Newbold's avatar
    It’s all well and good saving a couple of hundred quid on a boiler, when that’s swamped by the huge differences in installation costs. Add to that the fact that cheap boilers are less reliable, need more repairs, and don’t last as long, and you soon realise that a cheap boiler is an incredibly bad investment.

    Worcester Bosch have topped the Which? reliability tables for many, many years now, and that’s based on hard evidence - not just individual experiences. Ours is now 18 years old, still going strong, but I’ll probably get it replaced by something more efficient this year. It’ll be another WB, one with a 12 year warranty, and my only problem is the ludicrous amount it’s inevitably going to cost to install the thing. 
    PAcdbOoAct's avatar
    Got any evidence for those claims?
  15. timmyboy147's avatar
    Selling property without a working boiler for 12 months. Pipe work is ok.

    Swale heating quoting £5000 all in, British Gas £6000.

    ——-

    Is it worth getting a new boiler fitted before putting the property on the market? Will it devalue the property a lot without one?

    It’s a really complicated situation. I part own with the ex who lives there but after I appointed a solicitor and threatened legal action from my side she’s prepared to finally sell.

    What other options do I have in regards to the boiler

    Many thanks (edited)
    Newbold's avatar
    Can’t comment on the prices quoted, but as regards the impact on the value of the property it depends very much on the value of the house and the rest of its condition. It would certainly limit the market, and if you limit the market you’re likely to affect the value.

    In most cases I’d say you’d be far better off to have the work done than have to negotiate a lower sale price, down by probably a lot more than £5k.
  16. stoufer_the_cat's avatar
    I got one of these installed through boxt, half the price of BG muppets who wanted to erect scaffolding to change flue on 2nd floor. Fat plumber turned up, scooted up a ladder and changed flue over in 5 mins
    TN567's avatar
    Mario came to your house? Nice
  17. Chiptivo's avatar
    Great find, amazed I got another winter out of mine.

    Looks a relatively simple DIY job as well (As long as you get a gas safe guy to connect the GAS and check the installation).

    Thanks op.
    nathanlewiswarrilow's avatar
    Good luck finding one who will sign it off.
  18. rowlystravel's avatar
    Worcester Bosch are massive rip off merchants. Avoid. If you want the warranty and any works completed you will basically be subscribing to WB for 5 years
    Newbold's avatar
    Meaning what?
  19. freddyfender's avatar
    Yeah I've heard these boilers aren't what they used to be ...and.apparently a lot don't like working on them cause everything is a pain to get to
    I've had a couple and they've been ok to be honest

    Unless you know a plumber you'll have a job getting someone to fit one they haven't supplied ...that's just a fact ...they won't like doing it for various reasons ...and it's not like they need the work

    I've a guy I've used for years ...he swears by ideal boilers (which I always thought were cheap and not long lasting ) and has one himself (edited)
  20. freddyfender's avatar
    I had boxt about 4 or 5 years ago ...it was 1700 quid

    Think most people charge around 2 1/2 ..3 grand to supply and fit a boiler ....unless its British gas then it's probably double that
    sheffield788's avatar
    4k here from British Gas, Vaillant with 5 year warranty. But we changed the location too. The only reason we went with them was 4 year interest free credit. Others were charging about 3k, but no free interest, so after 4 years, the cost would've been the same. Cash in hand with a plumber would've been about £2,600 for a cheaper brand.
  21. Giwin's avatar
    Pretty sure my parents have installed this one a few days ago as the boiler packed up after 25 years (intermittent hot/cold water)

    Cost in total just below £2000 with installation, they have no complaints yet
    sheffield788's avatar
    That was a reasonable price. Our quotes were closer to 3k. However, it involved relocation.
  22. RifleEyes's avatar
    Warranty length tells you all you need to know IMO...
    philjstephenson's avatar
    100% agree, standard Ideal is 10 years ( as long as its serviced every 12 months by the old GS guy )

    WB seem to have been making their way down the rankings lately
  23. john_william's avatar
    Decent price. I have to do a relocation aswell so probably looking 3500 total. Current boiler in the loft. Lord knows why it's there
    graham321's avatar
    Snap. And not just in the loft but jammed into a back corner at an awkward height. I assume whoever did that had ideas about converting the loft, but even so. Meters and meters of pipe run for no good reason. Couldn’t get further from mains gas and water if you tried. 
  24. ahotukdeal's avatar
    Viessmann currently have some good deals direct. If you actually need a more powerful combi (most don't) then there is 35kwh on offer.
  25. Stuntgut's avatar
    Why do people keep talking about BOXT? They quoted me £2805 to replace a like for like boiler that I can buy for £1000 Inc vat from any retailer. That's £1805 fitting for basically a days work. Boiler is a Worcester Bosch Greenstar 12Ri to be replaced with a Worcester Bosch Greenstar 12Ri. Jokers.
    sheffield788's avatar
    But your local plumber would've charged about £2,500 anyway. With the boiler included. BOXT offers interest-free credit as far as I'm aware. (edited)
  26. trills's avatar
    Author
    An iPhone that costs almost twice this has a 1 yrs. warranty.
  27. jumbosausage's avatar
    Recommended glow worm. UK made, same factory and much the same parts as Valliant. If you get a Glow Worm approved installer you can get the 10 year warranty. Usually 250-300 than equivalent Valliant boiler.
    ddavis's avatar
    One fairly important part is very different (aluminium heat exchanger).
    The Vaillant is quieter too.
  28. ddavis's avatar
    This isn't actually that cheap. My supplier would do the same + MC1 + MC3 for £772 and they are typically not the best price (but they are the best service).

    The two chemicals are £37 at City making the same pack £789.
  29. barnehurst's avatar
    Had a Worcester boiler for 12 years - its been nothing but trouble. Had plumbers out at least 10 times
  30. roy.giovanni's avatar
    Add a Worcester wave and a magnet and these can be warranted to 12 years
  31. graham321's avatar
    I certainly wouldn't spend £5k on it.

    Might depend how desirable it is. If it's a one-of-a-kind property, people will just reduce their bids a little to take the extra expense into account. If it's a bog-standard semi, people will be put off.
  32. iamchrisdman's avatar
    Only my opinion but the Baxi combi boiler we have has done us well for the last 5 years or so. Just had manual maintenance and nothing more.
  33. Orange_swan's avatar
    Mine is 28kwh. And I have a 2 up 1 down
  34. ADT's avatar
    Apologies for my ignorance, is this gas or electric? Currently scouting for a electric boiler.
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