This is a inverter system makes a td in cooling of 20°. In heating is 30. The system works efficiently and runs well. It does have major corrosion going on in the air handler. The system is rusting away at the blower motor and the supply box is pretty covered in bio growth. The heat strips as well are very badly covered in rust. I recommend we replace the heat strip package along with the blower motor wheel and housing. In doing so I can clean up the system with everything out in the open. I recommend a uv light for the supply box as well. He wants to talk system replacement this Saturday first call at 10 am.