condensing

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. A

    condensing boiler service schedule?

    I just had a Gas Safe plumber "service" my Gloworm,I think the boiler knew more about him that he did about it.What parts should be inspected in a newish (12 month) condensing boiler?
    • alibongo
    • Thread
    • about boiler checks condensing condensing boiler oil safety service should
    • Replies: 16
    • Forum: Plumbing Jobs | The Job-board
  2. G

    Baxi Bermuda BBU 15 HE Condensing Pump Problem

    Hi, got home from work last night and boiler was showing fault code E158 (condensing discharge fault). Have had a look in the boiler and there is a small pool of water in the bottom of the boiler so I have taken the condensing pump off and the bottom of it appears to be warped and not sealing...
  3. M

    Red Diesel Oil Boiler?

    Have a customer out in the sticks looking to install a boiler running off of red diesel.. Has anybody done this or know what the best boiler is? Plus this place get's to -20. Will the Red diesel freeze? Any suggestions appreciated.
  4. J

    Ideal Icos m3080 condensing boiler

    Hi, I have the above boiler with an unvented tap in the airing cupboard. I want to drain the system as I'm fitting some new radiators and a new ensuite. I'm unsure how to refill/repressurise the system once the work is done. I've previously been told I need to let the water back into the...
  5. H

    New Grant vortex condensing combi boiler not working

    We have just had a brand new CH system and Grant vortex condensing combi boiler installed. It worked on Friday night when the boiler man commissioned it but then it didn't fire up on Saturday and hasn't worked since. We have bled the oil, installed a new tiger loop, in case the last one was...
    • hoolent
    • Thread
    • boiler combi combi boiler condensing grant installed not working oil system vortex worked working
    • Replies: 2
    • Forum: Plumbing Jobs | The Job-board
  6. X

    baxi solo 24 condensing boiler(not combi)

    could someone please give me feedback on this boiler which has been recommended by british gas.how does it rate versus worcester bosch/valiant etc.Should i go ahead with installation.
  7. A

    Ferroli condensing boiler not heating rads

    Hi, as title boiler dropped below 1bar and light started to flash so was was toped up but now only the hot water works. Any ideas? Thanks. Anthony.
    • Antnkel
    • Thread
    • boiler central heating system cold radiator condensing condensing boiler ferroli hot rads not heating oil
    • Replies: 1
    • Forum: Plumbing Jobs | The Job-board
  8. J

    Damsel in Distress!! - Expansion vessel - Vailant Condensing Boiler Ecotec Pro 28

    Hi out there... My boiler is losing pressure over a day or 2. I've read lots of the posts on here and think it may be the EV or PRV. Could some one please tell me how to access and re-charge the EV and what pressure I should charge to?? If its the PRV I assume I need to get an engineer to...
    • jinjan
    • Thread
    • boiler condensing condensing boiler ecotec expansion expansion vessel oil pro pro 28 vailant vessel
    • Replies: 1
    • Forum: Plumbing Jobs | The Job-board
  9. D

    Condensing Boiler Pressure Problem

    I am not a plumber and have a very limited knowledge of such matters. 1. I have a largish 3 storey house with underfloor heating (installed 10 years ago). 2. I have an Immergas - Victrix condensing boiler (installed 5 years ago) and an external Grundfos pump (installed 2 years ago). 3. Last...
  10. M

    Rad Sizing - Condensing Combi - Help

    I wonder if someone could advise best practice regarding rad sizing... House is Victorian semi - 5 beds - 3 reception - 1 bath - 10ft ceilings. Longest run to rads is 25 metres for the upstairs front bedroom - the boiler is at the rear of the house. I have just finished calculating the heat...
  11. R

    condensing boiler working under pressure?

    i was told that a condensing boiler works better under pressure? is this correct? surley a condensing boiler is a condensing boiler for a reason, and no matter the situation it will still condense?! im currently looking into fitting a boiler but ive been told to use a 30kw boiler, this house is...
  12. A

    Lagging external pipe from condensing boiler

    Hi, i've been asked to lag the above pipe from where it comes out of the wall to the drain. could I legally do this myself or do i have to get a qualified plumber to do it? thanks in advance alex
  13. B

    Potterton Performa 28 non condensing leak

    hello, my brother has a leak on his boiler as above, the leak is coming from the diverter pin which connects to the micro switch. Im no breakdown engineer having only recently qualified so if i am to strip the diverter head down to reveal the inners which part is it likely to be that will...
  14. F

    flue in chimney

    i currently have a back boiler and i was thinking of upgrading it to a combi boiler. i wanted the combi upstairs in the airing cupboard thats next to the chimney. is it possible to have the flue in the chimney rather than a vertical that goes throo the roof?
  15. S

    Condensing Combi

    Does a condensing combi, produce enough condensate to keep the trap filled???? I only ask, because I posted a thread about an Isar HE24 and mention, that the customer can smell gas when it fires up, I took off the Trap and it was bone dry, not a drop of condensate. I know believe that the...
  16. G

    Best device for balancin radiators

    What do you guys use for balancing a heating system?? i.e differential thermometer, infra red etc Aways done it roughly by touch but have to make up a certificate for this perticular customer and looking to provide accurate-ish info
  17. R

    OAPs with HW problems on Greenstar 24i junior combi condensing boiler

    Trying to help my elderly in-laws with 5-year-old Greenstar 24i junior combi condensing boiler. It has run OK until now, and no plumbing work undertaken recently, except for me replacing washer in cold tap last week. The story so far: On Monday night, they report major HW problems: boiler...
    • RonL
    • Thread
    • 24i boiler combi condensing condensing boiler greenstar junior oil problems
    • Replies: 9
    • Forum: Plumbing Jobs | The Job-board
  18. M

    combustion ratio?

    hi need some advice as getting bit confused. action point for combustion ratio for a combi not condensing is 0.008 what is the action point for a condensing boiler as have read 0.008 is I.D and 0.004 is A.R is the right???? many thanks
  19. B

    condensing boiler on Vertex flue ?

    Went to do a landlords today in a ground floor flat. They have a 3 year old Greenstar 24i Junior, flue goes into stud wall then up, through flat above & into attic. I couldn't get access to the flat above or the attic today but there is a tile ridge terminal visible on the top of the roof so I'm...
  20. S

    wb24 non condensing

    lat winter customer called pressure keep dropping,went round re fill the system to 1.5bar fired boiler pressure goes up and prv opens up and let water out ! I then drained system fully down and check pressure in vessel was I think o.4 so I pumped it up to 1 bar ,then week later customer on the...

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