If you know how to do electrical work and mount mini-split units securely on the wall, it is possible to install it yourself. It is a good idea to read the user’s manual and watch instructional videos before doing this DIY project. However, hiring a professional HVAC technician is more beneficial than doing it yourself. A licensed professional can do their work quicker and safer. You will avoid unnecessary mistakes that cause damage to your home or the AC unit itself. Some manufacturers only offer warranties if their mini-split AC units are installed by licensed HVAC technicians.