Node red and tado intergration

Hello People,

We have our home installed with 8 radiators and tado.

Big room have main thermostat from tado and the 2 radiators in that room a tado valve

Then we have 5 small rooms each with 1 tado valve and 1 big bedroom with 1 tado valve

The problem or heating system from intergas is to powerfull on low setting to only heat 1 room at the time for example 1 small room with 1 valve. We need to open 3 valves in that time.

So my idear is:

Set small room for example to 22 degree
Then 2 other small rooms valves also need to open automatically

But when i close one of these rooms by hitting the set point it need to stay open. When i close the room where i set the temp. It need to close the other rooms to. This also need to work visa versa

Can someone help me out where to start, i am new in node red have some flows working for lights and Google home

The way you explained it I’m afraid nobody will be able to help…

I at least don’t understand the problem.