Removed old equipment and installed new rheem 2 ton 2 stage heat pump and air handler. Removed old support shelf and built new support shelf for air handler to sit on. Installed new external filter rack with 16x20x1 filter, new coil safety switch, new nest thermostat and new composite pad for outdoor unit. Reconnected supply plenum, high voltage, low voltage, drain line and lineset. Tested system operations, set proper charge.