When you’re thinking about buying an AC, you need to think about the temperature outside. While you’d probably like it to be cool outside, you also need to consider how comfortable it will be inside. It’s not very comfortable to have a 16-degree temperature inside. In fact, you’d only be comfortable if you were wearing warm clothes.
AC can reach a very low temperature but it is important to keep it at a reasonable level for your living area. You should not sleep in a 16-degree room unless you wear warm clothes. The temperature in your bedroom should be two to three degrees lower than the rest of your house.