The Tado en Honeywell Evohome are only compatible with thermostatic valves. Below we explain how you can recognize these.
Plus and minus
The easiest way to check is by looking at your current TRV's / radiator knobs. Do you see a plus and minus on the TRV? Then it's safe to assume your valve is not thermostatic and therefore not compatible with the Tado and Evohome TRV's. You will need to have the valves replaced. Don't worry, for our Dutch customers we can replace the valves for you. Please be aware that this requires emptying your heating system of all the water inside. This does require a lot of time though. Are you interested in a quote? Please let us know via our contact form.
If you see the numbers 1 to 5 on your TRV, then it's safe to assume your valves are thermostatic. However, this does not mean they are directly compatible with the Tado or Evohome TRV's. The valves can come in different sizes. The most common one is m30 x 1,5, which is also used by Tado and Evohome. The Tado and Evohome TRV's also come with a couple of adapters, making them suitable for most valves. If you're doubting whether or not your valves are compatible, please send us a picture of both your current TRV's and valves.