The air conditioner makes too much noise. ✬

This car comes with an air conditioner. ✬

The air conditioner doesn't seem to work. ✬

Please turn up the air conditioner. ✬

Don't leave the air conditioner on. ✬

The air conditioner doesn't work. ✬

The air conditioner is out of order. ✬

I can't do without an air conditioner in the summer. ✬

Incidentally, this room doesn't have anything like an air conditioner. All it has is a hand-held paper fan. ✬

Which air conditioner do you think is the most efficient? ✬