2-Story Rooftop HVAC Package Unit Installation / Curb Replacement

A homeowner and contractor install a new HVAC unit on the roof of a 2-story house, replacing an old, poorly installed system from 1978. The project involves positioning the unit near a vent stack, running and connecting ductwork ("ducts"), electrical wiring (line and load connections), sealing penetrations with silicone, and cleaning up old materials and debris from the roof.