With a multi zone system, such as from Tado or Honeywell Evohome, you can set the temperature of each room in your house individually. This is perfect if e.g. you work from home and only want to heat your office, not the rest of the house. Or if the fireplace is on downstairs, this means that the boiler does not start, but you still might want to heat the nursery.
A multi zone system usually works with a main thermostat and special radiator knobs, or TRV's. These TRV's have a motor built in, with which they can open or close the radiator valve. This allows hot water to either heat the radiator, or it stops the water from entering the radiator.
The individual components communicate with each other via radio waves. For example, the thermostat can send a signal to the boiler that the boiler must be turned on. At the same time, the thermostat can send a signal to the radiator knobs of the zones that need to be heated to open them. Radio waves are more reliable than Wifi. Just think of the signal from the radio; a transmission tower may be far away from you while you still receiv a good signal.
How does it work with Wifi? The communication between the app and the system runs via Wifi. The app communicates with the thermostat via an internet bridge (built into the Evohome control panel, supplied separately with Tado). This way you can also adjust the temperature of a zone on your phone.
What do I need to keep in mind?
There are a number of things to take into account when purchasing a multi zone system. We discuss this in other articles:
- How do I know if my boiler is compatible with Tado or Evohome?
- Do I need a smart radiator knob on every radiator?
- How do I know if my radiators are suitable?
- I have underfloor heating. Can I also connect that?
- What can I do to make the system work safely?
- I have district or city heating (Dutch). Does that also work with multi zone?