From someone who went at 13, and whose sister went at 10, please don't, it's just too young.
My sister used to cry herself to sleep every night, I was summoned from my boarding house to sit with her. I had to squash my own feelings because she needed me.
We only went because it was a specialist music school. The education and musical training we received was superlative. The pastoral side was horrific. If you google specialist music school sexual abuse, my school will be up there with multiple court cases.
Although obviously people are now very aware, and checks are in place to stop anything being that bad again, the reality is, in a boarding house of 50 kids, so much happens that the house parents don't know about. You don't tell your parents because, really, what can they do.
I would never send any of mine, specialist education or not. If I had to, it wouldn't be before 14, and they would only be weekly boarders.
One of my dormmates was from Hong Kong, so only went home 3 times a year. She'd been there since she was 8.