Is it not a replacement for a guy standing in a room and trying to keep the temperature at the right spot?
I understand that there's "current-generation AI" which is miles beyond this. But closed-loop systems that try to make decisions based off of loop seems very much in the domain of intelligence in the practical sense.
I'm being a bit pedantic here, but the GGP in this thread saying that OP is not AI feels like shifting the goalposts way beyond what we would have said even 5 years ago.
Control systems are not intelligent. It helps to know how they work, and when you do you realize they work on very simple principles.
Intelligence is about learning and applying knowledge, AI is either simulating or synthesizing these behaviors outside of nature. It's not just taking the place of a function that something intelligent does.
Without making a solid distinction there, people are going to start calling PID temperature controllers "AI"