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District / Shared Heating: If you share a central boiler with other homes or flats, you cannot fit a central smart thermostat. That’s where smart radiator valves can help make your home heating a bit smarter. The image shows the active touch area on the new unit compared to the green house icon, which the documentation showed was the button. Installation
You can find a list of related automations here. Please start from the bottom as these automations are all linked and related. Radiator valves reduce or increase the amount of hot water that enters the radiator. Radiator valves don’t turn the boiler on or off. The room by room heating schedule helps save energy while you sleep, literally! Heat only the bedrooms at night time while decreasing the temperature in the rest of the house. Electronic programmable radiator valves can be programmed from a central hub to heat to a specific temperature at different times of day.
Your Nest thermostat controls whether the hot water flows to your radiator, and your radiator valve controls the pressure. Once you adjust your radiator valves to your preference, you can use your Nest thermostat to control the temperature so you don’t have to adjust your valves often. Note that when your radiator valve is closed, hot water doesn’t flow through your radiator. You can also set up heating schedules within the app to change the thermostat temperature throughout the day. In the diagram above, the thermostat is located in the living room. So you could set it to 18°C and also schedule this to change to 20°C between 7pm - 8pm, making it nice and cosy for you in the evening when you settle down in front of the TV. I recommend combining a smart house thermostat (such as for example the Nest Thermostat) with many TRVs which are installed on each individual radiator in your house, as that way you get the best of both worlds with a smart house thermostat which controls the general temperature in your whole house and then each TRV control the temperature in just the room it is in. That way you can have a hotter or colder temperature set on individual radiators located in different rooms like for example hallways, bedrooms, home office, and launch-room. Note though that in such a house thermostat + multiple TRV combination setup the main smart house thermostat (such as for example the Nest Thermostat for the central heating system + some kind of TVRs for all radiators) does not know anything about the TRVs or vice versa, so there is no communication between them whatsoever, but they still compliment each other anyway. Tuya ZigBee3.0 New Mini WiFi Radiator Actuator Smart Programmable Thermostat 2MQTT Setup Available Heater Temperature Controller Heating Accurate Battery Powered TRV Thermostatic Radiator Valve Controller Voice Control with Alexa Google Home by Moes...
You can easily set up heating schedules. For example, the heating can be turned off in all the rooms but the office during the day, and then be turned on low in the bedrooms and higher in the living room during the evening. Google Nest thermostats, namely Nest Learning Thermostat (all generations) and Nest Thermostat E, work alongside your existing radiator valves to help you stay comfortable and save energy. Nest thermostats are compatible with various radiator valve types, including Smart thermostatic radiator valves (Smart TRVs). In my case, actually in the city where I live, by Central Heating we understand city-wide heating. The utility company flips on their ‘super-Nest’ sometimes late Octoberish and keeps it on till late March/April whatever. Plus there are local (per building) ‘sub-statitons’ that regulate hot water flow based on i.e. local thermo sensors and building size and probably other stuff.When you install your Nest thermostat, it’s recommended that you or a professional sets the valves in each room for even heating. Most manufacturers have recommended settings which you can use as a guide. You can also try different settings to find out what’s right for you. Thermostatic radiator valves (TRVs) control the amount of water that enters a radiator. Unlike a manual valve, a TRV can regulate the temperature with a range instead of just on or off. The range is usually set between 1 to 7.
What about battery? Has anyone experience if there is difference between Z-Wave, Zigbee TRVs in battery life? A way to get better efficiency is to have the furnace run longer and less often. What I noticed is zone 1 would come on, 10 minute later zone 2, then zone 3… So I implemented a zone coordinator to get zones to come on together, Basically, when a zone comes on, I’ll boost the temperature by 1 degree on the other zones (subject to some rules), when that leading zone turns off, the boost is removed. I now have all my zones coordinated.When you set up your heating system, adjust your radiator valves properly to help tune your home for even heating and save energy in rooms that are rarely used. When your Nest thermostat is first installed, make sure that your radiator valves are tuned the way you like them. The function of a smart radiator valve (or SRV for short) is exactly the same, but with these four key advantages: The radiator is located next to the loft hatch, so hot air from the rest of the house would rise past the TRV and radiator, which resulted in the set temperature not working correctly. With a digitally controlled TRV, we can now add a temperature offset to prevent the valve and radiator and change its settings based on the other Zigbee temperature sensor in the loft. Their Evohome smart TRV’s are used on individual radiators to allow zoning. Note that you will also need the Honeywell thermostat and boiler relay which doesn’t currently come bundled with this kit. If you plan to fit smart radiator valves, you’ll need to ensure they are compatible with your existing heating system:
The TRV has a setting only available in Zigbee2MQTT called "local_temperature_calibration" This allows you to add a temperature offset to allow for localised heating by the radiator or other heat sources. Adding to Home Assistant Home Assistant screen with TRV controls To save energy, turn radiator valves down in rooms that are rarely used, like guest rooms or storage rooms. The one-touch app is easy to configure if your hub is already in place and the whole system can be integrated with Alexa, Google Home and IFTTT. The Drayton Wiser system has eco-mode, comfort mode and away mode which is what you’d typically expect. Put the correct adaptor on the valve (most smart radiator valves come with adaptors for the most common valves) The smart radiator valves fit on to your existing valves using the included ring, no need to drain your radiators so the installation is simple. You can add on as many thermostats and valves as you need, up to 32 different radiators and 16 different rooms per home. You can also integrate their smart plugs which could be used with other heating and cooling systems that sit outside the main system.
Conclusion
The cost has increased significantly after the energy crisis. I bought mine, end of January 2022 for 64 Euros a piece. I assume though that the cost would be increasing on other brands as well. All the smart radiator valves can communicate with the smart thermostat, meaning you can turn the boiler on and off by changing the settings of any of the heating devices. Out of our three home setups, this gives you the most complete control of your heating. Having TRVs installed on your radiators allows you to set the temperature in individual rooms. This makes it easier for you to keep rooms at a consistent and comfortable temperature and save on heating bills by only heating the rooms you need to.
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