Today I arrived on site and performed a winter tune-up on the whole home system. Here's a summary of the work completed: **Indoor Unit (Furnace - Attic/Garage):** * Verified the indoor unit is in good overall condition. * Confirmed the indoor coil is in good condition. * Observed the filter size as 20x30x1 (pleated 1"). Customer has spare filters and will replace them. * Inspected and confirmed the blower wheel, burners, exhaust flue, heat exchanger, secondary drain pan, primary drain pan, and electrical wires are secured and in good working order. **Outdoor Unit (Straight Cool - Side of House):** * Verified the outdoor unit is in good overall condition. * Confirmed the outdoor coil is in good condition. * Tested and verified the blower motor, compressor, and electrical wiring are working properly within manufacturer's specifications. **System Performance:** * Tested for carbon monoxide; result was 0.00 PPM. * Measured return air temperature at 74.0°F and supply