Very good point. I didn't do all that at all. I closed all doors and all windows. Even after that zone 4 was coming up.
But someone in the forum, while answering someone else using a Veritas, wrote "zone 4: patio doors". Admittedly I do not know if they gave this as an example or if this is the default recommendation for Veritas... All I know is that the previous people didn't use it so I can hope everything is set as default (for example the code was the default code).
But considering I ran a test with everything closed, I still do not know which house room to look out for....