Look for the Tick!
Be sure to check your technician's accreditation before you have an Air Conditioner installed or serviced in your home. The benefits of an ARC licenced technician include peace of mind knowing they are qualified and adhere to the industry code of practice. They also are trained to mitigate environmental impacts through the correct management and handling of refrigerant gas.
For further information confirm you have made the right choice see https://arctick.org/media/1069/rhl-handouts_rac.pdf