How does the Tado TRVs act when changing temperature slightly?
We're looking to get a smart heating system, but before we can choose, I have a pretty... Strange question, maybe.
And sorry if I'm not super clear, I'm not 100% sure if I'm using the correct terms in English.
In our home, we have direct cycle district heating (with direct cycle, I mean that we have no heat exchanger, i.e. the water in the actual radiators comes directly from the heating company), and the pressure is rather high, which makes fully open valves hiss quite a bit.
For old-fashioned thermostatic radiator valves, that is not really an issue. The flow opens and closes very slowly, so if it is a little bit too cold, you'll not really notice any hiss.
However, we have some semi-smart HomeXpert valves, and they work... Different. If it needs to adjust the heat a bit, the valve is fully opened, and when the temperature is reached, it's fully closed again. Which would be fine, if it wasn't for the hiss from the fully open valves. When the temperature needs to be raised in the morning, everyone wakes up. Not ideal.
So my question is, how does the Tado valves do it? Slow "traditional" TRV-like control, or the same yanking the valve fully open as the HomeXpert valves?
And if it does yank it open, and anyone else has the same hissing issue as us, did you find any workarounds?