4 system Lennox high efficiency, two stage, variable speed, gas furnace heating system tune up, maintenance, cleaning, safety inspection, run test. Install 4 replacement 20x25x2 pleated air filters Resurface flame sensors Inspect/flush drains Inspect batteries and thermostat operation in all heating modes 4 system WaterFurnace hydronic heating coils heating run test No concerns with any systems. Filter change and inspect operation on three whole house dehumidifiers 16x20x2