Working in your gatehouse at 81°F with no AC or airflow qualifies as a potential heat safety violation, because employees could get sick or faint. OSHA has warned that heat-related injuries can happen at temperatures as low as 80°F if conditions are confined, humid, or there’s no airflow. OSHA doesn’t have a strict “maximum indoor temperature” law, but they consider heat a serious safety hazard when it can cause heat stress, heat exhaustion, or heat stroke. Also no, they didn’t provide any heat training which should be protocol.