Installed new 2-ton Carrier Gas system. Installed new Ecobee Pro. Rebuilt and insulated condensate drain line. Replaced secondary drain pan. Installed new filter dryer, pressure tested with dry nitrogen and pulled a vacuum on copper line set. Built a transition to existing supply plenum and sealed with mastic airlock. Sealed return air chase using duct board insulation. Sealed all seams with mastic for airtight seal. Charged system to factory spec. System is working properly at time of departure. Installed new 2.5-ton Carrier Gas system. Installed new Ecobee Pro. Rebuilt and insulated condensate drain line. Replaced secondary drain pan. Installed new filter dryer, pressure tested with dry nitrogen and pulled a vacuum on copper line set. Replaced both supply and return plenums and sealed with mastic airlock. Charged system to factory spec. System is working properly at time of departure.