A friend of my mate's runs his own aircon company, mostly does residential work.
A1 Airconditioning, iirc.
Ph. Eddie - 0414409076
He's been in business for himself for at least 5-6 years, and has no intention of giving up any time soon. He's done installs and service work in my IP1, PPOR, my grandmother's house, my workmate's IP, and my neighbours house..... all have been excellent workmanship and fair price.
He's not the cheapest, cos he doesnt do ***** work. Well worth the extra couple of $$ over the cheap people.