Arrived on time took 4 hours from start to finish. Installed air conditioning unit to our existing gas furnace. Inspector came checked it out and the only thing that didn't pass was the external electrical outlet that was a GFCI outlet. He tested it and could not reset it. I have had problems myself installing a GFCI outlet and it seemed fine but it wouldn't reset. They have not came back to replace it but it could be that the Inspector didn't call them.