Is it correct in English to use an before words beginning with H or is this rule just for vowels?

You're right! The rule about using "an" before vowels applies to vowel *sounds*, not just letters.

Here's the breakdown:

* Vowel Sounds: "An" is used before words that begin with a vowel *sound*, even if the first letter is a consonant.

* Examples:

* An hour (the "h" is silent, so it starts with a vowel sound)

* An honest person

* An umbrella

* Consonant Sounds: "A" is used before words that begin with a consonant *sound*, even if the first letter is a vowel.

* Examples:

* A university (the "u" has a consonant sound like "y")

* A European (the "e" has a consonant sound like "y")

So, while "h" is a consonant, if it's silent at the beginning of a word, it's considered to have a vowel sound, and you'll use "an."