You should hire a contractor who has experience with the installation of swamp coolers. You shouldn't hire a generalized HVAC contractor for this type of work because of the tricky nature of swamp coolers. If you hire a contractor who is experienced with these coolers, then you will be much more likely to get the job done quickly and cheaply

Find a contractor who is willing to provide you with references from previous employers. These references are generally given by email. You can use the references as a way to learn about the contractor before you make a hiring decision. This can save you a lot of hassle, a lot of frustration, and a lot of money in the long run.

You should get an estimate from the contractor before you hire him or her. The estimate will have to be flexible due to the fact that repair work is often unpredictable. The contractor may believe that one thing is wrong at first, but then find other issues once repairs start.