When combined, the meaning is perfectly logical: 燃 (burn) + 气 (gas) + 费 (fee) = the fee for the gas that you burn.
While the concept of a “gas bill” is universal, its context in modern China has unique characteristics.
“燃气费” is a high-frequency term in daily life. You'll encounter it in these situations:
The term is neutral and can be used in any context, from a formal rental agreement to a casual chat with a roommate.