Install Aprilaire 600M bypass humidifier. Humidifier is mounted on supply plenum, and bypass pipe run to return drop. Drain line is tied in fith furnace drain due to limited space in floor drain. Waterline is ran to hot waterline on wall behind furnace. Electric is ran into furnace and connected to thermostat for operation. Test ran humidifier from thermostat. Humidifier is operating properly. Instructed Brett on operation procedure and how to change humidifier pad. Flushed out hot water heater. Some calcium deposits were Flushed out, and no dirt or sediment deposits were witnessed.