Make the Smart Radiator Valves quieter



  • Hi @jcwacky,

    With regards to your comment for question1 that....
    " Tado does this automatically depending on the difference in temperature between the setpoint and the room temperature "
    I must point out that Tado have confirmed to me via email that the radiator valve is
    " Fully Open or Fully Closed " Tado SRT's do not / can not partially open a radiator TRV.
  • jcwacky
    jcwacky ✭✭✭

    @GrayDav4276 That doesn't sound correct in my experience. Try this:

    In a room with the heating off, take note of the current temperature in Tado, e.g. 20.5ºC.

    Manually set Tado in that room to be about 0.3ºC higher, so 20.8ºC in this case, you will hear the SRV motor operate for a split second, i.e. not fully opening the valve. If you then increase the setpoint by several degrees, e.g. to 25ºC, you'll then hear the motor operate for much longer, e.g. fully opening the valve.

  • GrayDav4276
    GrayDav4276 ✭✭✭
    edited January 21
    Hi @jcwacky,

    I agree with your observation, and I have also noticed 'minor' 'tweeks' of my SRT's as opposed to 'full adjustments' of the valves.....which (I agree) appears to indicate that the SRT has 'partially' opened or closed the radiator valve......

    However.....if this is indeed the case then why have I recently received an email from Tado Support which completely contradicts this.

    Then either the Tado users (us) are wrong in our observations.....or Tado Support don't actually know how their own systems work (could be true)

    I have already copied the Tado Support email into a previous post on " How smart/ learning is the thermostat " please feel free to read that post, I will repost the email into this thread if you would like to see it.
    I'm not trying to be contradictory.....just stating what I have received from Tado Support.
  • jcwacky
    jcwacky ✭✭✭

    @GrayDav4276 I've just read your email from Tado, and I do think whoever wrote that response is wrong when they say "It does not "partially open" the valve".

    Another scenario:

    Imagine room A is calling for a high heat demand (maybe the heating has only just been turned on in that room), and room B is calling for a light heat demand (as the heating has been on for a while and it is just maintaining the current temp).

    Without the SRTs being able to partially open the valve in room B, it would need to be fully opening and closing the valve every few seconds so that the radiator stays warm and not hot, or it would need to modulate the boiler but this would then cause room A to heat up too slowly. In my experience, neither of these occur, so it must be opening the valve partially.

  • samd
    samd ✭✭✭

    @jcwacky I did an exercise which I thought categorically showed that partial settings were being used. I chastised myself when I read tado message!

  • Hey @jcwacky & @samd ,

    I'm "Fully Open" (just a little pun....sorry) to the SRT's being able to 'partially open' the radiator valves.......if they don't operate that way......then their functionality is extremely limited fact pretty useless imho.

    What I find very distressing is the fact that a member of Tado Support would issue a response that is (apparently) a total misrepresentation of this Tado device operability.

    I'm beginning to get even more disappointed with not only the "TRUE" functionality of the Tado system.....but also the level of Tado Support.

    I am considering raising this with Tado see what type of response they will provide......☹️😤

  • Isn't the noise you are hearing more to do with the noise of the water flowing through the radiators rather than the valve itself ? The problem i have is that the circulating pump in my combi boiler runs at the same speed whether one radiator valve is open or all 12 of them . If only one is open the water is being circulated at high speed which results in a lot of noise.
  • Hi @Archer,
    I know the "water" noise that you refer to, and this isn't that noise....the "water" noise would be there while the valve was open, potentially many minutes.

    The noise that we are referring to is the noise created by the motor in the SRT.

    If the SRT is "Fully Opening" or indeed "Fully Closing" then the motor runs for approximately 2 seconds.....however we are hearing the motor run for a much shorter time......hence our "HOPE" that the SRT's are actually partially opening the radiator TRV in relation to the temperature differential between the current temperature and the new requested temperature.
  • Klaus_Ludwig
    Klaus_Ludwig ✭✭
    edited January 25

    A couple of months ago I fitted a Tado system in my home together with over a dozen Tado TRV's. Personally I am very pleased with the system overall (significant savings already apparent), but would be very keen to see further technical developments.

    The majority of my Tado valve actuators were installed in the horizontal plane. I did fit all new valves in addition to the new Tado actuators for the sake of reliability. I have noted that the few that I have installed vertically are significantly affected by radiant heat from the radiator. This results in false high temperature indication and with specific reference to this post - more active valve actuators - which are responding to the temperature of the air immediately adjacent to the radiator.

    Based on observation; in order to minimise the frequent control actions of the Tado valves I would agree that fitting a separate wireless temperature sensor (available from Tado - at a price) to those rooms (such as bedrooms) where the noise made by the actuators is an issue or fitting the valves in the horizontal plane so that they are much less affected by the radiant heat from the radiator. I have only one room that is controlled only by a separate sensor and the Tado valve actuators in that room are a lot less active. Personally I don't find the noise made by the actuators an issue, but appreciate that there are those who do.

    Setting the bedroom temperature set point to drop a couple of degrees at bedtime might also help if actuator noise is mainly an issue when trying to get to sleep. The valve(s) in that room will immediately close and you will hopefully be fast asleep by the time they decide to open again.

    Finally, there seems to be some debate on this post as to whether or not the valve actuators can open partially. They do indeed. The percentage that they are open (for only those that are open to any degree) can be seen by clicking on the "Care & Protect" tile on the home page.

  • Great Post @Klaus_Ludwig,
    Some interesting points discussed ✔️👍
  • Personally the noise isn’t noticeable for me whilst asleep, but I am quite a heavy sleeper. Sure this is something all smart TRV manufacturers are working on.
  • Do your radiators have Angled TRV bodies on them? I was refitting one of my radiators yesterday and noticed the TRV body connects to the rad via an extendable pipe that twists into any position required by the pipework. Seems this is called an Angled TRV. The Tado motor is much noisier on this rad than my other one which has regular solid TRV pipework. Everything else about these rads is the same, so I think that pipework is vibrating loudly every time the valve adjusts. Will be swapping it for the fixed fitting and see if it improves things.
  • samd
    samd ✭✭✭

    Deleted - error my part

  • Yes.... to noisy! For Bedrooms not acceptable!

  • I suppose a work around would be to fit a standard trv on the opposite end of the radiator instead of the lock shield and set it to the preferred bedroom temperature and only use the Tado valve as a simple on of valve to turn off the heating during the day by setting the bedtime temperature very high and the daytime temperature down to your preferred set back level.

    But this does seem to be a terribly wasteful use of the Tado valve by limiting it's functions.

  • Jacopo2
    Jacopo2 ✭✭✭
    edited February 8

    I just thought of a possible workround for the noise problem; the aim is to have the valves remain fully opened during the night so that there is no noise during the morning when the radiator starts to heat up

    There is an option to select a zone controller for each room

    If you select "no zone controller" and set the schedule for that room to be a warm temperature from a few minutes before your bed time till the time after you wake up, the valve will be opened for the entire night; now, if you have at least another room calling for heat in the morning, that will make the boiler turn on and also heat your bedroom because the trv is already open

  • Hey @Jacopo2,

    Have you " trialed" this idea 💡....did it work for you ?? 🤔.........Interesting 🧐
  • Jacopo2
    Jacopo2 ✭✭✭

    @GrayDav4276 yes, when I set the TRV in the bedroom to the temperature I want it to reach the next morning, it opens fully, then when some other radiator calls for heat, water starts circulating in the radiator and there isn't any noise coming from the valve itself (as it's already open)

  • @Jacopo2 Exactly how I have mine setup. Bedroom valves open up at about 19:00 when the heating is off for the day anyway, then the main thermostat kicks in in the morning before we get up and warms the bedrooms and the rest of the house together. No noise as they are open before we go to sleep and are already open in the morning.

    Not that I find them loud to be honest but I have had it setup this way from the beginning.