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Central Heating Boiler, Combi Boiler, Hot Water Boiler

Central Heating Boiler | Boiler - Hot water boiling system​


A boiler is a closed vessel in which fluid (generally water) is heated. The fluid does not necessarily boil. The heated or vaporized fluid exits the boiler for use in various processes or heating applications, including water heating, central heating, boiler-based power generation, cooking, and sanitation.
Central Heating Boiler | Boiler - Hot water boiling system

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  1. R

    Convert a boiler

    I have an intergas compact hre 18 ov Can this be converted to a combi boiler
  2. D

    Boiler Noise

    I have a Worcester Greenstar gas boiler circa 2017. There has been a noise coming from the boiler which resembles running water, I have checked the system pressure at 1.5bar and the relief valve but the noise persists unless a hot water tap in the house is opened then it stops for a period of...
  3. T

    IDEAL CONCORD FLOOR STANDING BOILER

    Wanted old Ideal Standard Concorde Boiler for spare parts. If you are removing one please let me know. Thanks
  4. J

    Sapphire Modulating Oil Fired Boiler

    Has any installer/user any feedback on these?.
  5. I

    New Vaillant EcoTec 836, slight leak underneath, what is this connector for?

    Got a replacement combination boiler, less that 1 year old. Noticed some water from the connection pictured. Can't see what is it from the manuals, possibly a rainwater drain? Was told by the person from Vaillant that it was an A A V (auto air vent), but she didn't sound too certain! Can...
  6. M

    UK 6

    I wish to add a second boiler to my existing meter. Location 20m away. Underground run. Can l use 32mm yellow pipe with copper tails at each end. Thank you in advance
  7. E

    Can this Boiler Flue be reduced in size?

    Hello All, I was hoping you could help with a potential boiler build query for my father. He has recently had a new boiler installed via British Gas (valiant brand). The external boiler flue seems excessively tall, proving to be somewhat of an eye sore (please see pictures attached). I know it...
  8. C

    How to clean the industrial boiler headers, in addition to chemical methods?

    How to clean the scale inside the casing and pipe rows of industrial boiler headers, in addition to chemical methods? What is the approximate lifespan of the end caps at both ends of the header box? Is it feasible to clean the cut end face? I want to try using a blowing machine to blow out the...
  9. T

    Demand for Heating Not Firing Boiler

    Hi, I have a Vailant EcoTec Boiler with a Megaflo. These are controlled by a Honeywell controller. I have one 3 port diverter, where one of the outputs goes to a 2 port diverter prior to the Megaflo (I believe this is some safety feature). I have run into an intermittent problem where some...
  10. H

    Keston Qudos 28s boiler AR or ID?

  11. A

    URGENT Should a plumber inform you that your new Combi boiler would be no good with a digital pump.

    Hi. I recently had a renovation done. My builder installed a new Combi boiler instead of my system boiler. He connected the pipework to the digital pump. He did not inform us that we would need a new processor because we had changed to a Combi and subsequently a valve blew. Should my builders...
  12. D

    Boiler pressure dropping to zero when heating turns off.

    Good afternoon, I am experiencing a pressure issue with my heating system and was hoping to receive additional insight as to what the problem could be. We have a biomass boiler and stratification tank set up and recently had an issue with boiler pressure dropping off when the system was cold...
  13. back2thefuture1

    Boiler condensate pipe fitted behind plasterboard

    Hi everyone I hope you can help. We were getting some work done and our builder attached the boiler condensate pipe to the sink waste pipe. This was all then covered with dot and dab. Shown in the picture, red arrow. So the only thing visible now is a round pipe from the wall. We are yet to fit...
  14. F

    Replacing an installed megaflow system with a combi-boiler when current boiler needs replacing

    Home owner looking for some advice pls. We have a megaflow system which we are considering removing as the tank takes up a lot of space and we don’t find we are using more than one shower or bath at a time. Our plan is to do this when the current boiler needs replacing (probably in the next...
  15. alanmcm

    Moving into a new home and boiler system is 17 years old

    My daughter bought her first home and was hoping to convert to gas but its not available in the area, so thinking a boiler upgrade is the better way to go. Just after some advice and rough costs involved, is it worth getting a pressurised system installed and a new boiler and oil pump? Heating...
  16. F

    Heat only new boiler recommendations?

    Hi All, Looking for a recommendation for a heat only boiler to replace my 30yrs old ideal boiler. Any makes you would recommend and any to avoid? Thanks
  17. B

    Vaillant Eco Boiler not working query

    Hi all I have a Vaillant eco boiler at a new house I moved into last week. It’s a combo boiler and the last boiler I had was old (and much easier to use!) This one keeps turning itself off. The hot water seems to work and is always warm. The heating also works but for random amounts of time...
  18. B

    New boiler - Inhibitor top up?

    During an install of new boiler ('old' boiler died after 11-12 years) the system was "drained" but I guess maybe 90% of water was left in the (rather large) underfloor pipe system. What is the best way to tell how much inhibitor should be added in this case? (also taking account that system was...
  19. Garroth

    GlowWorm Boiler Burner Never Switches Off

    Hi, whenever my Gloworm 18r is on even if I leave it on non-stop for 6 hours the flame symbol for the burner never switches off and the radiator icon never stops flashing implying the rads are calling for more heat, even though they're all red hot and have been for hours, is this a fault or just...
  20. Zig168

    Combi Boiler vs System Boiler

    I think the last discussion was back in 2021. A few questions to guide any discussion. Which are the cheapest to heat over the year, system or combi in an average 3/4 bed property? Which will be the more reliable and cheapest boiler type to repair over the next 10 years? Is there a better...
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