We provide specialized engineering design for car park ventilation systems, focusing on maintaining acceptable indoor air quality and controlling carbon monoxide (CO) concentrations under varying vehicle operating conditions. Our scope includes ventilation demand calculations, jet fan and exhaust fan selection, airflow distribution analysis, CO sensor positioning, control sequence development, and integration with BMS for demand-controlled ventilation. We deliver coordinated designs and technical documentation that address fire and life-safety interfaces, energy efficiency, and applicable codes and authority requirements, supporting safe, reliable, and efficient operation of underground and enclosed parking facilities.