Today, I performed a winter time maintenance on your HVAC equipment. Overall, the equipment is in fair condition. The coil, although clean, has significant rust due to the age of the unit. This is a normal occurrence caused by the moisture produced when running the AC during the summer. Here are the details of the unit: Location, Type, and Picture of Indoor Unit: The indoor unit is located in the attic and is an air handler. Area Unit Services: This is a whole home unit and it is a Lennox 4 ton heat pump. Filtration: The pleated 2-6" filter was checked and replaced today. The filter size is 20x25x4, and I have included a picture of the filter. Condition of Indoor Coil: The indoor coil is in fair condition and has been cleaned. I performed a brush cleaning on it today. The outdoor unit is located in the back yard and is a heat pump. The outdoor coil is in good condition and has been cleaned today. I have tested and inspected the following electrical components on your equipment, and th