#First Project: Heating

1 messages · Page 1 of 1 (latest)

obsidian oasis
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Hey guys, I want to start with Home Assistant from scratch (Alexa, Hue, Zigbee Lighting present) and my first project is heating.

So far I want to buy a Beelink S12 Pro as server and get a ZBT-1/Skyconnect stick from mediarath for connectivity. That's what I am nearly quite sure about.
The confusing comes with the choice of thermostats and temperature sensors.
I read much about sonoff trvzb + temp sensors, both good and bad. I am confused that they can only open fully or close. does that mean they will turn on and off repeatedly every few minutes?
Also I read equally many "I love them they work perfect" and "they are the worst get xy" reviews...
Sonoff, Avatto, Bosch, Aqara I just don't know which I should buy for my first project.

Can someone please point me in the right direction here? Thank you very much for every input guys

green cobalt
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I can't help here with the exact question but I too am looking at working on heating. I live in New England so the fear for me is eithe my automation failing and the pipes freezing, or my automation fails in a way that leaves it calling for heat "forever". So as you look at your implementation, consider how to mitigate these potential serious failure modes. I expect safeties, like the ability for a "real' thermostat to override, have been implemented. I just haven't looked yet. I'm not looking to hijack this thread but it came up as I happened to also be thinking about this.

harsh rover
iron cipher
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Not supposed to have partially open valves in a water-based heating system.. I think because the water pressure & flow is calculated for fully open or closed, and you can get unexpected effects like turbulence, uneven heating, maybe even water hammer etc. if not used as designed.

lilac island
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You can absolutely use partially open valves. A traditional mechanical/wax trv is a continuous control device and the valve will almost always be either partially open or closed.

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I use the sonoff TRVZB and a bunch of temperature sensors, and the versatile thermostat integration which can implement partially open/closed behaviour on them out of the box - keeps my room within about 0.2 degrees of the set point which is pretty solid, boiler consumption has gone down since I implemented it to die to significantly less overheating

green cobalt
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Where you can't use partially open valves for certain is in a steam heat system but OP seems to be working with a hot water system.

iron cipher
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Hmm, I stand corrected. Thanks, might look into that for tighter temp consistency then 🙂

lilac island
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You generally need at least one return path that isn't restricted for safety (e.g. Bathroom radiators/towel rails which are a pain to fit trvs on anyway) so you don't accidentally pump against a fully locked off system, but yeah - it works great otherwise.

deep badge
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i have recently installed the new tado trvs, they seem to work fairly well mechanically, work with matter over thread to some degree; i haven't integrated them in ha yet, however note that the integrated temperature readings is always wrong, you either have to shill out a frankly ridiculous amount of money for their own thermometer, or accept that the temperature will never read perfectly

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also the software seems still kinda garbage, i have one trv that refused to update first, then now it refuses to be shared with alexa unlike all the other ones, the support haven't came back yet in about a week too (and when they did before i am unsure they even really read what i wrote)

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it's disappointing because the hardware looks really solid, the motor is super silent and the integrated battery pack is rechargeable seems long lasting

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maybe it would be ok if paired with ha directly, idk about that, i don't think the software matches the price tag (or even half really), the hardware so far seems to