Performed the new furnace start up. No gas leaks detected. Combustion readings were normal. No CO detected in the air. Drain is working. High limit passed the safety check. Heat rise was 39°. Unit is heating properly. I showed Jeff how to change the electrostatic filter and the aprilaire water panel. He wasn’t too concerned with connecting the thermostat to his phone. I turned the WiFi off to the stat for now. I told him we can come back if he changes his mind.