If you keep having to add refrigerant, there's a leak in your system. Air conditioners are closed systems. So, unless there's a problem, the level of liquid within it should remain constant. A continual leaking of refrigerant is bad for the environment. As time goes on, it'll become more difficult to top the system up as well. So, instead of charging the system, we recommend contacting our AC professionals. We'll quickly uncover the source of this leak and make recommendations. If your system is older and uses a refrigerant being phased out, a new AC is typically recommended. The high upfront cost can be offset by efficiency savings, rebates, and peace of mind.