Does anybody know for certain if in the State of Georgia, an HVAC ("conditioned air") license is required in order for a homeowner to install their own HVAC system?
The type of unit called a "package unit", where the condenser and air-handler are combined into a single outdoor unit comes from the factory already charged.
That solves the refrigerant side of the equation. Don't actually know if that is sufficient in Georgia or not.
Some un-named individual who lives in my house in NC installed one of these and, so far at least, has gotten away with it.