Performed Platinum Comfort Club Membership Tune-Up on Heating System Cleaned and checked operation of equipment. Filter size is an Aprilaire 501. Verified working status of surge protection. Checked steam humidifier and dehumidifier as well. Renewed customers comfort club agreement. Performed Platinum Comfort Club Membership Tune-Up on Cooling System #501 Replacement Media for Aprilaire 5000 Comfort Club Renewal