Noisy combi boiler? (Ideal Logic 24) (2023 Update)

[Phil K]

I just had an Ideal Logic 24 combi boiler installed in the ground floor coat cupboard of my 3-bed semi. It's all working properly, but it sounds quite noisy from within upstairs rooms. Surprisingly, if you stand right outside the boiler cupboard, it sounds very quiet - even if the cupboard door is open. From upstairs, it sounds like a Boeing 747 just prior to takeoff. I guess it must be sending its sound waves directly upwards rather than outwards. Or could the sound be the actual copper pipework resonating?

I've been thinking about installing some kind of soundproof ceiling in the cupboard. Or is there some other remedy I should try first?

TIA

PK

[Phil K]

Phil K wrote in news:XnsA10C8731BAD78777777@130.133.4.11:

PS... Correction!: The boiler DOES sound noisy at its location in the coat cupboard. (I just checked again, during a period when the rest of the house is quiet). In fact, its location in the cupboard, is the place where the noise is loudest, as you'd expect. I've noticed that the noise doesn't stop as soon as the "burner on" LED goes out. And if I switch the boiler's front knob to off (i.e., from 'central heating' to completely 'off', the noise continues for approximately 4 minutes afterwards. The noise starts again instantly, as soon as I switch the boiler back on to "C" mode or "C+D" (ie., c/h + dhw). The noise sounds to me like the sound of a main burner - hence my earlier reference to a jet engine.

TIA

PK

[Phil K]

Phil K wrote in news:XnsA10D4DF1881B4777777@130.133.4.11:

PPS... Since the noise seems to be constant, while the c/h is turned on, and continues 4 minutes after it is turned off, and dos not disappear when the burner LED goes out, does this suggest that it is the flue fan that is making all the noise? Is this normal?

[RJH]

I've got the Logic 30, newly installed. I don't think it's overly noisy as these things go, but I will box it in when the time comes.

The 4 minute thing is either 'fan purge' or 'pump overrun' - does it not say that on the display? This suggests to me that the noise is more pump than burner.

My main complaint is a high pitched tone that can be heard in the bathroom, directly above the boiler, and throughout the house in the dead of night. Previous house with identical boiler did the same.

Rob

[Phil K]

RJH wrote in news:50a6a26c$0$15072$c3e8da3 $ [e-mail]:

Hi, Thanks for the input.

I hear similar occasionally, just as something inside the boiler is shutting off (valve or burner flame; I'm not sure which). That's what it sounds like to me, anyway.

PK

[Doctor Drivel]

Have a length of plastic pipe on the flow & return at the boiler to reduce noises running through the copper pipes.

Ideal are not the best of boilers.

[Phil K]

"Doctor Drivel" wrote in news:k8g64f$nhe$ [e-mail]:

I wondered about that. Has anyone else here found that to make a significant improvement? It would be good if someone made a special vibration-dampening pipe for this purpose.

PK

[JakeD]

Phil K wrote in news:XnsA111B2D4252E1777777@130.133.4.11:

I'm looking at the copper pipes coming from my boiler, and am thinking about embedding them in concrete to subdue the sound waves in the pipes.

JakeD

[Jonathan]

:

Won't that risk corroding the copper pipes?

Jonathan

[Fredxx]

To me that sounds like a pump and water noise. If there is circulating air signified by a sound of small tacks in the heating system then it would be prudent to remove this air if at all possible. The pump is generally powered through the boiler and will run for an extra few minutes to remove heat from the heat exchangers after the flame is out.

The pump is in the boiler and I'm not sure if you can alter the pump speed. If you can it might be worth reducing it by one notch.

[polygonum]

No - not until round tuits convert looking into action.:-)

[JakeD]

polygonum wrote in news:ah47bjFsvc4U1 @mid.individual.net:

Any more so than, say having a copper pipe outside, exposed to the elements? If so, I suppose the pipes could be painted first, to protect them from whatever corrosives might be present in concrete...

JakeD

[polygonum]

Actually, from what I have read, I think it entirely possible that concrete/cement could be far more aggressive than "weather".

[Doctor Drivel]

The vibration-dampening pipe is called plastic pipe.

[builder54]

the noise is fan purge i fit these all the time in social housing crap boilers but hey if you have a heat 12 for the price of a memory chip you can turn it into a 24kw

[carstainsby]

Hi I had one of these boilers fitted last September only realised when the win ter months arrived how noisy it is. I described it exactly as you did quie t enough at the boiler but sounds like a plane taking off throughout the ho use. The noise goes on for hours and is driving me mad, I had someone com e out but he just said they fit the boiler not my system and it is the powe r of the boiler causing this throughout the system. I said I'll have to le arn to live with it but I can't. It was put in through the government sche me so I feel I should not complain, but I am 68 and wish I still had my old boiler.

[gregwhite1977]

oat cupboard of my 3-bed semi. It's all working properly, but it sounds qui te noisy from within upstairs rooms. Surprisingly, if you stand right outsi de the boiler cupboard, it sounds very quiet - even if the cupboard door is open. From upstairs, it sounds like a Boeing 747 just prior to takeoff. I guess it must be sending its sound waves directly upwards rather than outwa rds. Or could the sound be the actual copper pipework resonating? I've been thinking about installing some kind of soundproof ceiling in the cupboard. Or is there some other remedy I should try first? TIA PK

HI, I've recently had an ideal boiler fitted and it's making a constant high pi tch noise like you describe. Did you manage to do anything to stop the nois e? Thanks

[darrenhorsey]

I fit around 40 of these boilers a year and am an accredited installer. Chasing pipe work into the wall or taking pipes outside is madness.. These boilers are one of the quietest on the market. Obviously boilers make noise but not like a 747. You either have air or crap in the system or a faulty boiler. I had a customer with a noisy Boiler and Ideal came straight out & replaced the gas valve..(these boilers come with a 7-5 year warranty.. If fitted properly they won't be noisy, that's one of the reasons we Powerflush a system. If there's a whooshing noise when the boiler fires then it's a faulty gas valve or the gas pipe work is undersized.. If there's a high pitched noise whilst boiler is working then it's either air in the pump or the fan squeeling.. The pump can be bleed of air, if it's the fan then it's an Ideal problem. Don't put up with a noisy boiler!!! The old chestnut ' I can't guarantee the system I only fitted the boiler' is a crock of crap.. If an installer has fitted the boiler & it's making a noise get them back to sort it.. We make enough money to be able to warrant a happy customer!! Ideal Logic boilers are fantastic for the money..

[Martin Brown]

You don't want concrete apart from causing corrosion that will just couple the noise into the brick structure of the house!

You can cast a reasonable bell out of concrete if you try hard enough (or make springs out of it).

Something like a HDPE foam sleeve tie wrapped onto the pipes or sorbothane might damp out some of the noise. My CH pump is supported this way. You might need to experiment to find the right separation of supports to damp out the worst resonance(s) in the pipework.

A noisy new install boiler is most likely air in the system somewhere allowing it to kettle. When everything is off bleeding the system at the highest point ought to fix it after a couple of goes.

Sound transmission is astonishingly difficult to prevent. The dense rock wool sold for cavity wall insulation works fairly well as an acoustic damper that is not flammable and has reasonable acoustic mass.

[RJH]

I have the same boiler, and work elsewhere meant I had the opportunity to place some plastic pipe in the run. This all but solved the ringing. But after a few weeks it came back. My own theory is sludge in the radiators and air. Not urgent.