Installed new Carrier 3-ton heat pump system. Installed new Ecobee Pro thermostat. Replaced both the supply and return plenums and sealed with mastic airlock. Rebuilt and insulated condensate drain line. Replaced secondary drain pan. Installed new filter dryer, pressure tested with dry nitrogen and pulled a vacuum on the copper line set. Ran new condenser low voltage and new high voltage whip. Ran low voltage in seal tight. Put on a new line set cover. Decked the attic with plywood for safe mobility. Charged system to factory specs.