Upon arrival I got all equipment info and then went to pick up filters and belts. Returned and performed maintenece on both Rooftops. Replaced filters and belts. Inspected cleanliness of blowers and coils. Checked capacitors and contactors. Cleaned flame sensors and burners. Inspected heat exchangers. Ran heat and checked amp draw and heat rise on both units. Let systems satisfy thermostats. Units operating normal. Asked receptionist if she could find out the door code for sprinkler room around back so we can use ladder whenever we return.