Complete: 2 systems worked on US Unit: Heil split HP: Came to replace warranty coil. Changed filter dryer, ran nitrogen, Hot Very Tight Attic, removed old Evap and installed new one. Pulled vacuum, no leaks, added 8lbs of 410. SH and SC were spot on. Delta T was 16 degrees it was 84 degrees in the house. Unit is working great at this time.