Currently 4 air conditioners 24 BTU. 2 air conditioners 18 BTU. And there are three left, I'm not sure if they are 24 or 18 BTU. The air conditioners are very new and haven't been used much. The reason for selling is moving to another city and not needing them. Please do not offer a low price. You have the right to see it, inspect it, and confirm for yourself that it is almost new.