A fűtés jó.

In Hungarian, the verb to be is usually left out in the present tense, third person.

So:

• A fűtés jó. = The heating is good.
• Literally: The heating good.

This is completely normal in Hungarian.
But in other persons, van or another form of to be appears:

• Én jó vagyok. = I am good.
• Te jó vagy. = You are good.

So the missing is is not an omission or slang; it is standard grammar.

A is the definite article, meaning the.

So:

• a fűtés = the heating

Hungarian has two forms of the definite article:

• a before most consonant sounds
• az before vowel sounds

Examples:

• a ház = the house
• az autó = the car

Since fűtés starts with a consonant sound, it takes a.

Fűtés means heating or the heating system/heating in a place, depending on context.

It comes from the verb fűt = to heat.

The ending -és often turns a verb into a noun referring to the action or process:

• fűt = to heat
• fűtés = heating

So in this sentence, a fűtés usually means something like:

• the heating
• the heating system
• the heating in the building/room

Good question. In this sentence, jó is not directly describing the noun inside the noun phrase. It is the predicate: it tells us something about the heating.

Compare:

• A jó fűtés = the good heating
  
  • here jó is an adjective directly modifying fűtés
• A fűtés jó. = The heating is good.
  
  • here jó is the predicate adjective

So jó comes after the noun because the structure is:

• subject
  • predicate adjective

A rough pronunciation is:

fű-taysh

More carefully:

• f as in English fine
• ű is a long Hungarian vowel that does not exist in standard English
• t
• é like a long ay sound
• s in Hungarian is pronounced like English sh

So:

• fűtés ≈ fyuu-taysh, but with rounded lips on ű

The stress in Hungarian is always on the first syllable:

• FŰtés

They are different vowels in Hungarian.

• u = a short vowel
• ú = a long version of u
• ü = a front rounded vowel
• ű = the long version of ü

In fűtés, the letter is ű, not u or ú.

For English speakers, ű can be tricky. A useful approximation is:

1. Say ee
2. Round your lips as if saying oo

That gets you closer to Hungarian ü / ű.

The double accent mark shows that the vowel is long.

Jó is pronounced roughly like yoh.

A few key points:

• Hungarian j sounds like English y
• ó is a long vowel, longer than plain o

So:

• jó ≈ yoh

It means good.

Yes. Jó a fűtés is also correct.

Both mean the same basic thing:

• A fűtés jó.
• Jó a fűtés.

The difference is mostly about focus or emphasis.

• A fűtés jó. = a neutral statement: The heating is good.
• Jó a fűtés. = puts a bit more focus on good: The heating is good / The heating’s good.

Hungarian word order is flexible, and moving parts of the sentence often changes what is emphasized rather than changing the core meaning.

Yes, absolutely. It is a complete, natural Hungarian sentence.

It has:

• a subject: a fűtés
• a predicate adjective: jó

Even though English requires is, Hungarian does not in this kind of sentence.

So this is not a fragment. It is a full sentence.

Not usually. Fűtés normally means heating or heating system, not a specific device.

If you mean a physical heater or radiator, Hungarian would usually use a different noun depending on the object, for example:

• radiátor = radiator
• hősugárzó = space heater
• fűtőtest = heating unit/radiator

So A fűtés jó is more like The heating is good than The heater is good.

In Hungarian, adjectives used this way do not have to agree with the noun in the way they often do in many other European languages.

So:

• a fűtés jó
• a szoba jó
• a könyvek jók only changes in the plural sentence because the predicate itself becomes plural in standard usage

In the singular, jó stays jó.

Hungarian does not have grammatical gender like masculine/feminine/neuter, so there is no gender agreement to worry about.

It is completely normal in everyday Hungarian.

You could say it when talking about a house, flat, hotel, office, or classroom:

• A fűtés jó. = The heating is good.

It is neutral and natural, not especially formal or especially casual.