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condensing boiler

Condensing boilers are water heaters fueled by gas or oil. They achieve high efficiency (typically greater than 90% on the higher heating value) by condensing water vapour in the exhaust gases and so recovering its latent heat of vaporisation, which would otherwise have been wasted. This condensed vapour leaves the system in liquid form, via a drain. In many countries, the use of condensing boilers is compulsory or encouraged with financial incentives.

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  1. B

    Back boiler to condensing boiler swap

    I live in Edinburgh and have received a quote for swapping my old back boiler, 23 years old with a new condensing combi boiler, as I know the Baxi Bermuda I have is really inefficient, and my gas bill is £100/month! Also Scottish Gas are refusing to cover it. I'm guessing it's too much risk for...
  2. Hobo128

    Fitting a Keston twin flue condensing boiler

    Hi has anyone dealt the Keston combi 30 (twin flue system). I went to see a job earlier and there is already a Keston system boiler in with this strange twin flue system in.(Which by the way is made out of 50mm solvent weld waste pipe. The propery is a 30-40 unit block of apartments. In the...
  3. G

    Condensing boiler using alot of oil.

    Hi Folks, I just wanted to ask about the oil consumption of my condensing boiler. It is a Worcester boiler which was installed and commissioned 2.5 years ago. The boiler achieved an efficiency back then of 98%. I have been keeping a close eye on my oil use recently and feel that it is excessive...
  4. Hobo128

    Installation of a condensing boiler and 7 rads????

    I know it doesn't really work like this without seeing the job but give me a price for fitting a condensing boiler and 7 rads re piping the whole lot, you can use hep for most of it, the ground floor 3 rads are on drops and are being chased into the walls( not down for plastering) the existing...
    • Hobo128
    • Thread
    • about boiler cheap cold radiator condensing condensing boiler hot rads installation interested labour oil you're
    • Replies: 25
    • Forum: Plumbing Jobs | The Job-board
  5. K

    Valillant ecotec 418 condensing boiler - 6 months old not working!

    hi This is long complicated story, please bear with me. I had this boiler fitted 6...
    • kitkat
    • Thread
    • boiler condensing condensing boiler could ecotec months not working oil old plumber system water working
    • Replies: 61
    • Forum: Plumbing Jobs | The Job-board
  6. S

    Ideal Logic 18 condensing boiler overflow pipe dripping

    We moved into a newbuild 18 months ago but over the last 2 months the overflow pipe to my boiler (located directly outside the side of the house, not to a drain) constantly drips. This only happens when the hot water is activated, and not when central heating is activated. The pressure of the...
    • sumnic
    • Thread
    • boiler condensing condensing boiler dripping ideal ideal logic logic oil overflow overflow pipe pipe
    • Replies: 17
    • Forum: Plumbing Jobs | The Job-board
  7. G

    Less heat in a condensing boiler

    Did any1 no that a a normal gas boiler heats a rad 30% more than on a condensing boiler. Has any1 ever fitted a new boiler like a combi swap an the customer says the house isn't has hot?
  8. M

    problem with a worcester bosch greenstar CDi condensing boiler cutting out

    Help! We had the above boiler fitted 2 years ago and it seems to have developed a life of it's own!! My 90 year old mum lives with us who feels the cold and the only way to keep the radiators hot is to have the system on constant and put the thermostat up and down. It's costing us a fortune in...
    • moyra stenhouse
    • Thread
    • boiler bosch central heating system condensing condensing boiler cutting cutting out greenstar oil problem started thermostat timed worcester worcester bosch
    • Replies: 13
    • Forum: Plumbing Jobs | The Job-board
  9. S

    "leaking" Ferroli Modena condensing boiler

    Has anyone experienced "leaking" on the new Ferroli Modena condensing boilers? We installed one this afternoon and liquid began seeping out from the bottom of the case via the gas tube. On opening the boiler we found that the tube which (probably) collects flu condensate is just stuffed into a...
  10. J

    What condensing boiler?

    Hi all. What are people's opinion of these? They've been suggested as a cheaper alternative to a combi. Is this the case? If so, what are people's reccommendations for a middle of the road 38kw? Thanks all. Jon
  11. T

    warmfkow condensing boiler

    hi was wondering if anyone can help me with a problem im having with a riello rdb burner on a warflow condensing boiler i looked at today.it runs fine for anything from 10 mins to 20 mins then loses pressure from 9bar to zero.it then either relights or cycles on and off a bit but doesnt...
  12. C

    Problems with new condensing boiler

    Hi, first post so apologies if technical language is wrong! background: last 20 years we have had a 5 bedroom house with a boiler that was new 20 years ago. Separate hot water and radiator circuits. All radiators heated quickly and were of an even temperature top to bottom and inlet to outlet...
    • Chrisbainbridge
    • Thread
    • boiler bottom condensing condensing boiler house oil problems radiators temperature
    • Replies: 5
    • Forum: Plumbing Jobs | The Job-board
  13. B

    Oil fired condensing boiler setup

    Hi all, First post here just looking for help or a link to setting up an oil fired condensing boiler. What is the ideal temperature for flow and return,is it 70/50, 75/55 and also what should the drop across the rads be? Should it be 12c or 20c. Thanks for any help
  14. T

    Grants vortex oil condensing boiler

    Hi guys. I've a grants vortex oil condensing boiler installed. The burner is a riello RDB. The system is installed approx 6 months from new. The boiler was working great til I ran out of all oil yesterday. Ive had a refill and now for some reason I don't seem to have power at the boiler or...
  15. P

    moving none condensing boiler

    can you confirm pls, that if a none condensing boiler has to be moved to another room than it has to be up grade to new condensing boiler,yes i am gsr but have not done much gas work lately due to getting more building work coming in,
  16. T

    can a modern condensing boiler do a 1-pipe system?

    I have a customer who has a one pipe system in steel, 15-20 radiators on it, with an old floor mounted boiler. He wants to split the system up into two and put two combis in. I can do all the pipework side of things not a problem, just wondered though would a standard condensing combi do 8-9...
  17. J

    Apparently only 32% of homes have a condensing boiler heating & Plumbing Monthly

    just starting to read this months copy that came today and was surprised to read this on page 6. it goes the managing director at ravenheat says we need more realistic pricing of boilers. to be honest i laughed i dont think the price of most boilers are that expensive. it's when you get the...
    • julesverne
    • Thread
    • boiler central heating system condensing condensing boiler oil plumbing
    • Replies: 7
    • Forum: Plumbing Jobs | The Job-board
  18. M

    high flue gas temperature readings of 90oc on Worcester 28i condensing boiler at full

    in service mode and boiler on max the flue temp goes way up to 90c all other reading are ok . i rang Worcester and they said it was ok but i wonder if its the towel rail first of the boiler causing the high temp no thermostatic just lock shields. in hot water only mode tap full on its 68c...
  19. R

    What are the dangers of using 15mm gas pipe on Condensing boiler

    Just been to a property today and the the boiler has 15mm gas pipe, The boiler has been recently installed its a Vaillant ecotec plus 24. I need to let the landlord know, but don't want him to think I am trying to pick out mistakes on some one else's installation. Would appreciate list on...
  20. C

    Condensing boiler is not for me

    I am a heating contractor/installer/employer with many years experiencenow retiring a bit from installation (knees etc)I would like to canvass some opinions. My friends in low places at BGtell me of horrendous failure rates of condensing boilers. Lots to do with crap in old systems that clog up...
    • Centralheatking
    • Thread
    • boiler boilers condensing condensing boiler oil system years
    • Replies: 12
    • Forum: Plumbing Jobs | The Job-board
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