Specifications include, but are not limited to: Check units for operation, model numbers, unit type and status, refrigerant type, and unit and duct measurements for air purification sizing; Determine what type of air purification system is most efficient to prevent, prepare for, and respond to the spread of COVID-19, and is most economical for the City to maintain after installation; Determine whether a building unit needs central control systems, or if there is a central control system, whether it is operative; Check, if applicable, chiller, boiler, cooling tower, chw Pumps, Hw Pumps; Develop plan to either repair or replace HVAC/chiller/boiler systems, and installation of air purification systems, optimizing ventilation and air flow to decrease risk and vulnerabilities of spreading COVID-19.