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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. D

    Condensing boiler problems

    Hi, please can you help me solve this. My condensing boiler (Glow worm Betacom 3 - 30c ) leaks what I think is condensate as it's not clean water. I think I'm not using my boiler enough?? I live alone and work away so the boiler doesn't get used much. It only happens in summer when the...
  2. Bogart

    Condensing boiler trap

    Now I always thought that a condensing boiler needed a condensate trap. Was at the back of mine just now and cannot see any trap. There is a 22mm plastic pipe from an outlet marked "condensing outlet" which goes off into a soakaway. It is a Grant Vortex Utility about 10 yrs old.
  3. T

    Glowworm condensing boiler noise issue

    Hi I have had somebody in to look at a relative's GlowWorm boiler which makes an intermittent whistling/howling noise. Its 8 years old and has been serviced every year and apart from this intermittent noise it works fine. They have had somebody out to them and they have recommended a new...
  4. Sue66

    Old non condensing boiler

    Hi I'm newly qualified. Why would a boiler be 23mb at the meter on working pressure and 19mb at boiler inlet pressure and 14mb burner pressure. This is fine as per the MIs but i thought there was only supposed to be a 1mb drop.
  5. Lofty24

    Condensing Boiler Drain

    Not a Boiler man but I have been to a house where the condensate pipe terminates into a 110mm pipe outside that looks like a drain but on closer inspection is a soak away. my question is, is this within the regulations or just lazy installation?
  6. T

    Controlling underfloor heating - what rocks your world? ( & works really well with condensing boiler

    Hi All, Happy Sunday! In my house there is a kitchen extension with Ufh connected to glow worm 38cxi. It has a blender valve and a circulation pump. both this and the radiator circuit are controlled by a wall stat. I don't think this works at all well. I'm planning to separate the rad...
    • Tom_B
    • Thread
    • boiler central heating system condensing condensing boiler oil really ufh under floor heating underfloor underfloor heating works world
    • Replies: 9
    • Forum: Plumbing Jobs | The Job-board
  7. L

    Gerkros Oil Fired condensing boiler heats water only

    Hi all, I have a gerkros oil fired, high efficiency condensing boiler with a Riello burner. The issue we have at the moment is that it heats water only when the control panel is set to Hot water only. When we set it to central heating and hot water it won't heat either? I believe the maker is...
  8. U

    Baxi Bermuda condensing boiler

    How do you drain the system to install another radiator
  9. M

    Radiator Sizing for 40c Vogue condensing boiler

    Hi there, We had a new combi boiler installed and decided to change the radiators at the same time. I went on to numerous websites calculating the appropriate Btu's and sent these to the plumber who agreed they were correct and stated he would base the radiators on these calculations. We...
  10. A

    Advise On 40mm Hole for Condensing Boiler.

    Hi To All.. Could any One Please Advise Which Drill is Best for 40mm Drill through the wall ? (Not Core Though).. SDS Drill which can easily drill through up to 40mm.. Thanks in Advance Regards Ibby
  11. J

    Re-routing vent pipe for condensing boiler

    Please advise me! We are building a conservatory but have a Worcester Bosch condensing boiler vent pipe where one of the walls will be. Is it possible to put a 90 degree angled pipe on it and re-route it through the new wall? How long can a vent pipe be? Thanks, Julie
  12. B

    Ariston micro genius 23 mffi non condensing boiler

    Is it just me can't see drain off on this boiler. Wanted to just drain boiler not the system. Ended up undoing rtn nut under boiler to drain it
  13. K

    Preparation for new condensing boiler- Advice please

    I'm about to refurbish my utility room. We have an oil boiler against an inside wall within the room (not against an outside wall). I'm not ready to replace the boiler yet but want to make sure I have all the necessary pipes in place for a new one later [so I don't have to rip up the new floor...
    • koiman
    • Thread
    • about advice boiler condensing condensing boiler floor oil pipes please
    • Replies: 2
    • Forum: Plumbing Jobs | The Job-board
  14. U

    Repressurising Promax HE Plus Condensing Boiler?

    Hi all, newbie here from sunny Clitheroe & I need help repressurising my Potterton Promax HE Plus condensing boiler if anyone can show me how. I've looked at 'how to' guides online & it seemed straightforward. However when I look at the pipework on my boiler, it doesn't seem to match. I've...
    • Unregistered
    • Thread
    • boiler condensing condensing boiler doesn't oil online other plus promax right
    • Replies: 1
    • Forum: Plumbing Jobs | The Job-board
  15. R

    Condensing Boiler Recommendation

    I need to replace a 22 year old vented wall mounted gas boiler with a heat only 30 kW condensing boiler. This is in a 4 bed 1.5 bathroom property I am flipping, so I am looking for a cheaper solution rather than an installation that I would have to live with. What are the cheapest and easiest...
    • Radioman
    • Thread
    • boiler condensing condensing boiler ideal install oil rather recommendation
    • Replies: 7
    • Forum: Plumbing Jobs | The Job-board
  16. S

    Underheating microbore with condensing boiler

    I’ve never been too happy with the condensing Vaillant EcoMax Pro 28E that replaced our original cast iron boiler heating our vented microbore system. The house didn’t seem to get any warmer than before the changeover about 5 years ago, but I’ve been told everything was OK so I did nothing about...
  17. P

    Worth Upgrading from a regular condensing boiler to a system condensing boiler?

    Hi, My Ideal Icos 12 condensing boiler (fitted by the builder when my house was built 6 years ago) is giving me problems to no end so decided to get rid of this junk and get a new boiler. I had a Worcester installer around yesterday for a quote and according to him my existing boiler is a...
  18. B

    Condensing boiler 20 degree differential

    Flow pipe temperature 70 degrees. Return pipe is 55 degrees. What would I need to do to get the 20 degree differential that they look for?! Turn down pump speed? Close off balancing valve on rads and cylinder until temperature on return pipe drops? Or is dere another trick?!
    • Bruno lang
    • Thread
    • balancing boiler combi condensing condensing boiler could degree differential oil return temperature
    • Replies: 3
    • Forum: Plumbing Jobs | The Job-board
  19. W

    Oil condensing boiler- Burner Lockout Problem

    Hi gents, ive had a problem for sometime now with an oil condensing boiler suffering from "burner lockout" I' ve just had the boiler serviced, cleaned and checked out and took the precautions to replace some of the suspect parts. Oil filter was replaced burner nozzle was replaced Solenoid was...
    • Widdzy
    • Thread
    • boiler burner condensing condensing boiler lockout oil problem replaced
    • Replies: 1
    • Forum: Plumbing Jobs | The Job-board
  20. M

    Cheapest & Best 25KW Combi condensing Boiler

    I will have to replace and old Worcester 24i boiler that is about 13 years old. I have been looking on line for some similar spec boilers and would like to know anyone have any suggestions. There is Worcester for about £900 but it seems very expensive. Any Ideas Thanks in Advance for...
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