I'm asking this because I couldn't find any answer on whether I should use "a" or "an" before an abbreviated word starting with "H" like "H.B.H", People seem to use "a" in these cases (been reading some articles and witnessed this), but it doesn't sound correct phonetics wise.
I searched the site but the questions seem to be concerned with non-abbreviated cases.
Hopefully, an SE member will have a logical input to this.