L'attestato di prestazione energetica include la classe energetica.

Because attestato is a masculine singular noun, and its basic article is il. However, before a word that begins with a vowel, il becomes l'.

So:

• il libro
• l'attestato

The apostrophe shows that a vowel has been dropped. This is called elision.

Attestato is a masculine singular noun. In this sentence it is the subject, because it is the thing that includes something.

You can tell it is singular because the verb is also singular: include.

Here di links one noun to another, a bit like of in English. It helps create a compound expression:

• attestato = certificate/document
• di prestazione energetica = of energy performance

So the whole phrase is a set expression meaning energy performance certificate.

In Italian, di + noun is very common for this kind of official or technical name.

Because here Italian is naming a type of document, not referring to one specific prestazione energetica.

• di prestazione energetica = energy-performance, as a category or label
• della prestazione energetica = of the energy performance, referring to a specific one

In technical names, Italian often uses di + noun without the article:

• carta di credito
• ufficio di polizia
• attestato di prestazione energetica

Because it describes two different feminine nouns:

• prestazione energetica
• classe energetica

The adjective energetica must agree in gender and number with the noun it describes.

Here:

• prestazione is feminine singular → energetica
• classe is feminine singular → energetica

If the noun were masculine singular, you would normally get energetico instead.

Because in Italian, adjectives often come after the noun, especially in formal, technical, and descriptive language.

So Italian naturally says:

• prestazione energetica
• classe energetica

rather than putting the adjective first.

English usually does the opposite, which is why this can feel unusual to English speakers.

Include is the third-person singular present tense of includere.

The subject is l'attestato, which is singular, so the verb must also be singular:

• l'attestato include = the certificate includes

Compare:

• l'attestato include
• gli attestati includono

So the verb form matches the subject.

Not exactly. It looks familiar, but the pronunciation is Italian.

A learner-friendly approximation is:

• in-KLOO-deh

The final -e is pronounced in Italian, unlike in English. Also, the stress is different from English.

So even though the spelling is similar, try to read it with Italian sound rules, not English ones.

Because classe is a feminine singular noun, so its definite article is la.

• la classe
• la classe energetica

Italian uses articles very regularly, often more than English does. Even where English might say simply energy rating in some contexts, Italian normally keeps the article if it means the energy rating/class.

No. It is the other way around.

The noun classe is already feminine, and the adjective has to match it. That is why you get:

• la classe energetica

not because the adjective makes it feminine, but because the noun is feminine first.

Yes. It is a standard formal term in Italian, especially in administrative and real-estate contexts. It is often treated as a set phrase rather than built fresh each time.

You may also see the abbreviation:

• APE = Attestato di Prestazione Energetica

So this sentence uses a very normal official expression.

Yes, but the given version is the most straightforward and neutral one:

• L'attestato di prestazione energetica include la classe energetica.

Italian can reorder things for style or emphasis, but this standard subject + verb + object order is the clearest and most common for a sentence like this.

For example, a more passive-style version could be:

• La classe energetica è inclusa nell'attestato di prestazione energetica.

That means essentially the same thing, but the focus shifts to la classe energetica.

Not here. In this context, energetica means related to energy or energy-performance related, not full of energy in a personal sense.

So:

• classe energetica = energy class / energy rating
• prestazione energetica = energy performance

This is a good example of a word that resembles English but is used in a more technical way.