For the purpose of this title:
ENERGY USING EQUIPMENT: That which is designed, constructed, erected or altered to operate by the use of fuel and/or power and shall include any devices and appurtenances or appliances, materials, ducts, pipes, piping, venting, gas piping, valves, fittings, fans, blowers and burners necessary to the performance of such functions that shall create comfort heating and/or cooling or power for work services.
MECHANICAL SYSTEM: Means and shall include, but not be limited to, any heating, comfort cooling, ventilation and refrigeration systems, or energy using equipment. (Prior code § 5-12-3)