Performed Heating maintenances on both furnaces. Merv 16 filter is still good today, will need to be change next visit 16x25x5. Cleaned flame sensor, vacuumed blower compartment, inspected Gas line, Gas pressure were within spec, cleared hoses and drain lines, all electrical wires and components were within spec and both systems are operating properly. Signed up on Superhero club membership for both systems today.