'Haitch' or 'Aitch'? How do you pronounce 'H'? Watch
People have dialects and some people need to get over it.
Anyway, "haitch", and it's due to my dialect.
Edit: Some people need to take themselves of their high horse considering the neg I and others have received on this inane and pointless issue.
Anyway, they're all wrong. It's obviously pronounced "hee", as in "bee" and "cee" and "dee" and "ee" and "fee" and "gee".