Description
Obstruction warning lights (FAA, ICAO, and other regulatory bodies). Dehumidifiers. Heaters. Passive (natural convection) and active (powered) ventilation systems. Lightning protection systems (NFPA and FAA and other regulatory bodies). Zenith access hatches. Maintenance climbing systems. Over-sized equipment access doors. Personnel doors. Snow/debris removal ropes. Interior and exterior lighting and electrical outlets.
https://www.satellitedish.com/info.pdf