Posting a message to the forum will remove the above advertisement
  1. Hi, welcome to the new look - Login with your usual login details, or sign up if you don't already have an account. If you post just once, all the advertisements get automatically removed. We have some competitions coming soon, and lots of new feaures. 

  2. WARNING! We do NOT provide advice related to Gas or other fuels to people who are not currently an official registered Heating Engineer. Do NOT ask for advice related to boiler repairs or installs. You need to find a heating engineer instead.

    Either seeking or providing advice on may result in your account being suspended or removed. These rules are in place to prevent deaths, which can easily occur from messing with heating systems when you're not qualified to do so.

Discuss Worcester v Grant v firebird v warmflow in the Oil and Solid Fuel Forum area at

  1. tridimnaw

    tridimnaw Member

    Hi guys,

    im after some info on the most common make of oilr boiler u all install. The majority of boilers ive imstalled are worcester, ive always thought grants and some firbirds are a pain in the a@@ to service, where as the worcesters are fairly straight forward. We fitted a couple if warmflos recently and found them to be a bit of a faff tbh, i know their a fair chunk cheaper than the worcester but there was what seemed like a lot of extra work to assemble them! What are your opinions on the range of makes available?
  2. Last Plumber

    Last Plumber Plumber GSR

    My opinion on Worcester after sales service is very poor. Sorry that's about the only comment I can think off right this minute.
    Do potterton not still make an oil boiler, I haven't seen one in a few years and I don't install that many. I'm mainly breakdown and service when it comes to oil.
    • Like Like x 1
  3. Jay The Plumber

    Jay The Plumber Active Member

    not fussed one way or another.. all oil boilers are a PITA :D
  4. Best

    Best Trusted Plumber Top Contributor!!

    Grant oil boilers everytime! (I don't like any combi oil though) Can't understand why you would think Grant boilers are hard to service? One door gets you into the two heat exchangers - and usually the door seals last.
    • Like Like x 1
  5. SimonG

    SimonG Trusted Plumber

    Warmflow for me.

    Quality of install is where longevity will come from. Too many pee poor installations with no addiional expansion or even mi's not folowed.
  6. Best

    Best Trusted Plumber Top Contributor!!

    Must admit I find Warmflow HE boilers fairly easy to service also, but they do have a couple of extra tasks I dislike. Firstly the secondary exchanger has a door you have to remove, then a rubber seal that needs replacing. Then there is the boiler baffles, which have to be properly staggered which is a pain and I bet few bother. Efficiency, even by Warmflows MIs is not just as good as Grant Vortex. Grant baffles are often too tight though and need a bit of careful grinding on some.
    The Warmflow combi is bother and I avoid them, but same with any oil combi.
  7. SimonG

    SimonG Trusted Plumber

    Wait till you see a HEE Warmflow combi. Done away with one of the pumps and a massive diverter in there now.

    Things on a warmflow combi I don't like :-

    The flexi hose to expansion vessel, gets blocked far too easy.
    Low pressure sensor and pressure gauge seperated by the flexi hose.
    The wiring center. Need hands like a 2 year old to get in. Use wago's now tho.
    • Like Like x 1
  8. Best

    Best Trusted Plumber Top Contributor!!

    Yes, the flexi between vessel & boiler on Warmflow combi is trouble.
    Also the washers around exchanger passing water plus the usual auto vents
  9. tridimnaw

    tridimnaw Member

    On almost every one i do the seals need replacing, its one of my peevs with grant, the snorkles cam be a pita and seem to be an afterthought!
  10. Best

    Best Trusted Plumber Top Contributor!!

    The cord seal on Grants? I find they are okay if I am careful removing the door not to tear them. The seal does get a bit tatty and some sulphur on it, must admit, but as long as it is still going to do its job sealing the gases in, then no problem.
  11. WHPES

    WHPES Trusted Plumber GSR

    I dont like Warmflow boilers at all, I think the build quality leaves a lot to be desired, however they are of course a budget model. Grant every time. The newer Worcesters are a pain in the backside to service.

    On the other question re Potterton, their oil boiler was the "Statesman", however this is no longer made since the company became part of Baxi.
Similar Threads - Worcester Grant firebird Forum Date
New Worcester Bosch mag filter? Central Heating Forum Saturday at 11:38 PM
Worcester Bosch G3 unvented course Plumbing Forum Jul 19, 2017
Worcester Greenstar Heatslave 12-18 Rad Capacity Central Heating Forum Jul 19, 2017
Expired Worcester warranty and which magnet filter? Central Heating Forum Jul 12, 2017
worcester flue length Gas Safe Register Forum - Public Forum Jul 6, 2017
Pump Problem on Worcester Heatslave Oil and Solid Fuel Forum Jun 21, 2017
Bosch Worcester 24Si II - boiler doesn't ignite Central Heating Forum Jun 18, 2017