A. As used in this section: “Computer equipment and peripherals” means computer equipment and peripherals subject to classification under the provisions of subdivision A 17 of § 58.1-3503 or under the provisions of subdivision A 43 of § 58.1-3506. “Cost approach” means assessing value by determining the cost to construct a reproduction or suitable replacement of fixtures and deducting physical, functional, and economic depreciation sustained by such fixtures. “Data center” means the same as such term is defined in subdivision A 43 of § 58.1-3506. “Fixtures” means all fixtures and equipment used in a data center except computer equipment and peripherals, equipment used for external surveillance and security, and fire and burglar alarm systems. “Fixtures” includes generators, radiators, exhaust fans, and fuel storage tanks; electrical substations, power distribution equipment, cogeneration equipment, and batteries; chillers, computer room air conditioners, and cool towers; heating, ventilating, and air conditioning systems; water storage tanks, water pumps, and piping; monitoring systems; and transmission and distribution equipment.