I am asking about controlling relays.

I am trying to set up a smart heating system with 5 rooms. I have an already working heating system with a boiler and container which works fine, I just wish to control the heating of each room separately.
I have set up thermometers which are connected through wifi/Nrf24 getaway to the main Raspberri Pi3 (currently working with AirMax). I can see the temperatures in real time, however I do not know how to proceed further.
I am using Arduino mini pro.

1. My first question is which one should I use: AirMax or PiHome for this purpose?
2. I need the rooms to be heated separately, or even multiple of them at the same time if it is needed. What script should I use to control the relays?

I'm quite new to this, sorry if this is the wrong place, or if it has been answered before!