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