Although one aspect that ductless AC systems boast is fast and easy installation, it is never a good plan to install one by yourself. Firstly, you could irreparably damage the system. In addition, it takes experience and training to work safely with AC refrigerants. A person who is untrained should never take on this task. Moreover, if the system is installed by anyone other than a licensed HVAC contractor, many manufacturers will void the warranty. Finally, a professional HVAC contractor can match the size of the unit to your home's capacity. Otherwise, you may have an AC system that is too small or too big, leading to issues with comfort and efficiency later on.
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