Day one-Remove both existing systems, accessories, and all ductwork. During day one I will design the duct system with installers there. We are switching from 2 systems to 1 system, with 2 zones. Thermostats will stay in the same place. Day 2- Run new wiring, run new line set, mount condenser on wall with wall-mount where 1.5 ton system used to be, reinforce air handler stand, install air handler and zone control board, install both amana S thermostats. Place line set on vacuum. Day 3- Install all new ductwork with 2 zone dampers, no supplies or returns need to be changed. Install air cleaner in filter rack in air handler. Start-up system.