Removed old furnace and installed new rheem 50k btu gas furnace. Installed new supply plenum, new return plenum, new zone board, new zone dampers, new emergency drain pan, new pan safety switch, new coil safety switch, and new 8” supply duct to garage. Reconnected high voltage, low voltage, drain line, gas line, vent pipe, and all duct work. Tested system operations in heating and cooling. Completed zone testing.