I have a neighbor who is basically just somebody who cares about to help in the community. He volunteers at all sorts of events and he also teaches homeowners how to install ductless Heating, Ventilation, and A/C systems for free. He is incredibly popular because of this because he has saved countless people a small luck by skipping the professional Heating, Ventilation, and A/C upgrade. It was something I knew nothing about until I decided to go to 1 of his Heating, Ventilation, and A/C upgrade tutorials. He also has online videos so you can always pause the video and replay it as needed to learn critical upgrade techniques. He also shows people how to install bizarre types of ductless mini splits and bizarre makes. This is so people who are looking to install their own ductless mini split can be confident they are installing their particular make and model respectfully. He only does these tutorials for Heating, Ventilation, and A/C systems that can be installed on your own. Some models you can do the upgrade however you still need to call an Heating, Ventilation, and A/C professional to charge refrigerant to the system. Other systems absolutely have precompressed refrigerants which makes the task possible without an Heating, Ventilation, and A/C professional. On the other hand, everybody has to learn how to do the electrical hookups. If you don’t know comfortable working with the electric part of the upgrade, my neighbor tells people they can always hire a professional electrician to take care of the task. Electricity is severely dangerous and is life-threatening, so don’t ever know less of a man because you want to be safe hiring a professional.