Arrived on site to perform fall tune up on a 2016 Lennox system. System located in hall closet client stated no issues. Cycled thermostat on and was good. Cleaned and wiped down system. Found flex ducting used. Filter was really dirty . Recommend replacing filter more often or as need. Blower assembly is accumulating slight dust. Motor is good. Amp draws are good. Inducer Motor is good and amps draws. Temperature rise is good and in heating range. Heat exchanger is good. Evaporator coil is good slight debris. Drain lines are clear but for slight dirt accumulating from dust and dirt entering system in past years. No protection on units recommended adding surge protectors on system to prevent system from getting damaged from electrical surges and power outages that can damage system or even components from electrical components. Cycled system to ensure system operating. Went over all findings and areas of concerns with client. Client is aware of condition of system and how it’s running