Technician arrived to perform a yearly friends and family club furnace maintenance on a 2000 Ruud and a 2023 Goodman furnace. Technician adjusted gas pressures, checked amps, checked static pressures, checked temperature differential, cleaned flame sensors, changed filters and insured proper operation. Technician also checked cleanliness of the mini split and insured proper operation of that as well . While changing filters, technician noticed dirty ductwork and made options on cleaning and sanitation. Customer did not want to move forward with any recommendations at this time, but they have been emailed to the customer. All systems are heating as they should.