The snake was taken to a local vet. Then, a reptile rescue center.
It will get a warm, safe enclosure. No boilers allowed. They will try to find its owner.
If no one claims it? It becomes a celebrity snake. Seriously. It might get adopted by a fan who loves weird pets.
Lessons for You (The Human)
First: Check your boiler. Not for monsters. Just for wandering reptiles.
Second: Don't panic. A non-venomous snake is just a wiggly neighbor. It won't attack you. It will just look confused.
Third: Appreciate the audacity of this snake. It didn't want a cave. It wanted central heating. Smart animal.
Finally: If you own a snake, secure your enclosure. They are Houdinis with scales.