Final answer:
Ventilation systems are crucial for maintaining air quality and temperature; even in non-hazardous environments.
Explanation:
True. A ventilation system must always be in a trench even when the atmosphere is not hazardous. Ventilation is crucial for maintaining air quality, temperature regulation, and preventing the buildup of harmful gases.
Mechanical ventilation systems play a key role in ensuring proper air circulation in enclosed spaces like greenhouses, helping to maintain optimal growing conditions for plants. Mechanically ventilated greenhouses require effective ventilation systems due to the large volume of air that needs to be moved for temperature control.
In summary, ventilation systems are essential not only for hazardous environments but also in non-hazardous settings to promote air quality and regulate temperature.
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