Όταν κάνει ζέστη, ανοίγω τον ανεμιστήρα στο σαλόνι.

Όταν means when.

In this sentence, it introduces a time clause:

Όταν κάνει ζέστη = When it’s hot

A very common Greek pattern is:

• Όταν + verb, main clause

So here:

• Όταν κάνει ζέστη, ανοίγω τον ανεμιστήρα στο σαλόνι.

This expresses a repeated or habitual situation: whenever it gets hot, I turn on the fan in the living room.

Yes, literally it looks unusual to an English speaker. But κάνει ζέστη is a very common Greek expression meaning:

• it’s hot
• the weather is hot
• there is heat

Greek often uses κάνει in weather and condition expressions:

• Κάνει κρύο = It’s cold
• Κάνει ζέστη = It’s hot
• Κάνει καλό καιρό = The weather is nice

So although the literal wording may seem odd in English, you should learn κάνει ζέστη as a fixed natural expression.

Because Greek uses the singular form in these impersonal expressions, similar to English it is hot.

Here, there is no real person doing the action. Κάνει ζέστη is an impersonal expression, so Greek uses:

• κάνει = it does / it makes

You do not normally need an explicit subject like it in Greek.

So:

• κάνει ζέστη = it’s hot

Greek often leaves out subject pronouns, especially when the verb ending already shows the person and number.

In English, you must say:

• it’s hot

In Greek, the verb form and the idiom are enough:

• κάνει ζέστη

This is very normal. Greek is a pro-drop language, meaning subject pronouns are often omitted unless needed for emphasis or contrast.

Yes, ανοίγω basically means I open, but Greek also uses it for switching certain devices on.

So:

• ανοίγω την πόρτα = I open the door
• ανοίγω την τηλεόραση = I turn on the TV
• ανοίγω τον ανεμιστήρα = I turn on the fan

This is a very natural extension of the meaning in Greek. English separates open and turn on more clearly, but Greek often uses ανοίγω for both, depending on the object.

Greek usually uses the definite article much more often than English does.

So where English might say:

• I turn on the fan

Greek naturally says:

• ανοίγω τον ανεμιστήρα

The article τον is the masculine singular accusative form of the.

Because ανεμιστήρας is a masculine noun, and it is the direct object of ανοίγω, it appears as:

• nominative: ο ανεμιστήρας
• accusative: τον ανεμιστήρα

Because it is in the accusative case, not the nominative.

The dictionary form is:

• ο ανεμιστήρας = the fan

But after a verb, as a direct object, masculine nouns like this usually change:

• βλέπω τον ανεμιστήρα = I see the fan
• ανοίγω τον ανεμιστήρα = I turn on the fan

So:

• -ας in the nominative
• often becomes -α in the accusative

That is why you get:

• ο ανεμιστήρας
• τον ανεμιστήρα

Στο σαλόνι means in the living room.

It is made from:

• σε = in / at / to
• το = the

These combine into:

• στο = in the / at the / to the

So:

• στο σαλόνι = in the living room

Greek very commonly contracts σε + article:

• σε + το = στο
• σε + τη(ν) = στη(ν)
• σε + τον = στον

Because σαλόνι is simply a neuter noun in Greek. Noun gender in Greek is grammatical, not always logical.

Its basic forms are:

• το σαλόνι = the living room
• στο σαλόνι = in the living room

You usually just learn the noun together with its article:

• το σαλόνι

That helps you remember both the gender and the correct forms later.

Because the sentence begins with a subordinate clause:

• Όταν κάνει ζέστη, …

Then comes the main clause:

• ανοίγω τον ανεμιστήρα στο σαλόνι.

This is similar to English punctuation:

• When it’s hot, I turn on the fan in the living room.

The comma helps separate the introductory when clause from the main statement.

Because the Greek present tense is commonly used for habitual or repeated actions, just like in English.

So:

• Όταν κάνει ζέστη, ανοίγω τον ανεμιστήρα
  means
• When it’s hot, I turn on the fan

This does not mean only right now. It can describe what you generally do whenever that situation happens.

Because the verb ending already tells you the subject.

• ανοίγω = I open / I turn on

So Greek normally does not need εγώ unless you want emphasis:

• Εγώ ανοίγω τον ανεμιστήρα = I’m the one who turns on the fan

Without emphasis, the simple verb is enough:

• ανοίγω

This is one of the most important habits for English speakers to get used to in Greek.

Greek word order is more flexible than English word order, although some versions sound more natural than others.

The given sentence is perfectly natural:

• Όταν κάνει ζέστη, ανοίγω τον ανεμιστήρα στο σαλόνι.

You could also hear variations like:

• Ανοίγω τον ανεμιστήρα στο σαλόνι όταν κάνει ζέστη.

Both are understandable. The original version puts the when condition first, which is a very common and natural way to say it.

In normal interpretation, στο σαλόνι most naturally refers to the location of the fan or the action: the fan in the living room / I turn it on in the living room.

So the sentence is understood as:

• When it’s hot, I turn on the fan in the living room.

Context usually makes this clear. If needed, Greek can be more specific, but in everyday speech this phrasing is completely normal.

A rough pronunciation guide is:

• OTan KANi ZES-ti, a-NI-go ton a-ne-mi-STI-ra sto sa-LO-ni

A few helpful notes:

• ό in Όταν is stressed
• κά in κάνει is stressed
• ζέ in ζέστη is stressed
• νοί in ανοίγω is stressed
• στή in ανεμιστήρα is stressed
• λό in σαλόνι is stressed

Also:

• ζ sounds like the z in zoo
• γ in ανοίγω here sounds like a soft voiced sound, often approximated for learners as g in a simplified pronunciation guide

It is a natural and understandable way to say it. Greek often uses ανοίγω for switching devices on.

Depending on context, speakers may also use other expressions, but for a learner, ανοίγω τον ανεμιστήρα is a good, useful phrase to know.

So if your goal is to learn everyday Greek, this sentence is perfectly worth learning as it stands.