The Contractor shall provide all personnel, management, material, parts, equipment, supplies, labor, area clean-up and transportation to perform: four (4) preventive maintenance inspections (during normal working hours unless otherwise noted) on the equipment as detailed on the enclosed Equipment Covered List . The technicians will maintain detailed service reports on your equipment to establish individual unit case histories for future analysis and reference. This will include preferential fast response 24-hour emergency service over non-agreement customers. Emergency service labor and will be provided at no additional charge during normal working hours for services after normal working hours (8 a.m. 4:30 p.m. Monday through Friday). Holidays and Sundays will be invoiced at the normal straight time rate. Parts and included maintenance materials will be provided at no extra cost. Service will be performed by Liebert factory-trained service technicians equipped to service Liebert HVAC equipment, computer rooms, air filters, belts, humidifier cleaning, humidifier steam cylinder replacement, humidifier Quartz lamps, general maintenance & cleaning materials, evaporator and condenser coil cleaning, lubrications, refrigerant recovery and recycling by CFC certified technicians.