Board Thread:Help Desk/@comment-24721499-20140723133013/@comment-5754239-20140724222318

Breaking awkward silence...

I think it depends on the context. Sometimes it is easier to use the abbreviation, while sometimes it's more grammatically correct to use the full phrase. For example, if it's in a sentence, you'd say, "This product takes one hour and 15 minutes to be produced." In an infobox, it might be "1 h 15 min", since you only need the information, not the grammar.

That's just my opinion, anyway.