If you take care of your air conditioning unit, you could prolong its life and get the most use out of it. Generally you should be able to do most of the maintenance yourself. However, in the more serious cases, it would be better to hire a contractor.
The efficiency of your workers and their productivity has a direct relation to the kind of work environment they are provided. Among many other things, heat and humidity can be an issue. You sure wouldn’t want your workers to suffer, as that will also hamper your business goals. Providing a cool and refreshing climate to work in always helps you to get the best out of your workers.