What does “BTU” mean regarding air conditioners?
British Thermal Units? Well it might mean that. I haven’t had an air conditioner in years but I think it shows the cooling capacity of the air conditioner. You need to determine the size of the room to cool before just buying an air conditioner. You might need a 5000 BTU unit or even a big one like 10,000 BTU, or larger depending on the size of the space you are cooling. You can’t just pick a giant one because they work better when the proper size is married to the room.