Removed old equipment and old zoning equipment. Installed new rheem 3 ton variable speed full gas system. Installed new supply plenum, new return plenum with 16x25x4 filter, new emergency drain pan, new pan safety switch, new coil safety switch, new thermostats, new zone dampers, new zone board, and new composite pad for outdoor unit. Reconnected high voltage, low voltage, drain line, gas line, vent pipe, and all ductwork. Tested system operations in heating and cooling.