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Thread: Evohome is Noisy - please help me

  1. #201
    Automated Home Legend paulockenden's Avatar
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    Is there anyone here that finds Evohome too noisy and who ALSO has a pressurised heating system (usually a combi boiler) ?

    It made a big difference when I switched from an old-school vented system, although the noise wasn't obtrusive even before that.

    i wonder whether all of the people with the noise issue are running unvented systems?

    P.

  2. #202
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    Quote Originally Posted by paulockenden View Post
    Is there anyone here that finds Evohome too noisy and who ALSO has a pressurised heating system (usually a combi boiler) ?

    It made a big difference when I switched from an old-school vented system, although the noise wasn't obtrusive even before that.

    i wonder whether all of the people with the noise issue are running unvented systems?

    P.
    Interesting point. You have mentioned this before. I am sure I once read about the conductivity of sound and pressure. I can't help here though, mine is a good old fashioned boiler.

  3. #203
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    Quote Originally Posted by paulockenden View Post
    Is there anyone here that finds Evohome too noisy and who ALSO has a pressurised heating system (usually a combi boiler) ?

    It made a big difference when I switched from an old-school vented system, although the noise wasn't obtrusive even before that.

    i wonder whether all of the people with the noise issue are running unvented systems?

    P.
    I am running with a combi and they are noisy unfortunately.

  4. #204
    Moderator Kevin's Avatar
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    I am running a pressured system and have noise issues.

    Someone told me maybe a year ago that new valves were coming onto the market that only made a noise when the system changed the set temperature. They achieved this by being based upon old style thermal expansion valves that had their setting alterable through a motor varying thickness within the mechanism. Thus ongoing regulation required no motor movement. I suppose at setpoint change they could do this really slowly to minimise noise too. Apparently they had also tried a local heating element to achieve offset but that unsurprisingly was impractical for battery life.

    I never found out the manufacturer or if these ever made it to market or not.

    K

  5. #205
    Automated Home Legend paulockenden's Avatar
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    I think old-school TRVs have quite a degree of hysteresis, so I don't think such an arrangement would be able to maintain the precise temperature control (and thus comfort levels) that you see with Evohome and similar systems.

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