What component is vital for the maintenance of cabin temperature in the ERJ-145?

The environmental control system is essential for maintaining cabin temperature in the ERJ-145. This system manages the flow of air throughout the cabin and ensures a comfortable and safe atmosphere for passengers and crew. It regulates not only temperature but also ventilation and air quality by controlling both the heating and cooling of cabin air through various operational modes.

The environmental control system works in conjunction with other components such as the air conditioning system and heat exchangers to maintain the desired temperature set by the crew. By continuously monitoring and adjusting airflow and temperature, it provides a stable environment even as the aircraft climbs or descends, or while operating in different external conditions.

In contrast, the other components listed, while important to the overall aircraft operation, do not specifically focus on temperature control within the cabin. The humidity control system plays a role in managing moisture levels but is not primarily responsible for temperature. The propulsion management system is focused on engine performance and efficiency, whereas electro-mechanical controls relate to various electromechanical components on the aircraft, rather than the environmental systems directly affecting cabin climate.