One of the goals of controlling odors in indoor spaces is to reduce:

Reducing headaches and discomfort is a key goal of controlling odors in indoor spaces because poor indoor air quality, often characterized by unpleasant or strong odors, can lead to a range of health issues for occupants. Odors can cause irritation and stress, impacting overall well-being and comfort. For instance, odors from volatile organic compounds (VOCs), mold, or other pollutants can contribute to headaches, nausea, or fatigue. Therefore, effective odor control measures contribute not only to a more pleasant environment but also to the health of the individuals within that space.

Fresh air exchanges are important for improving indoor air quality, but the focus of this question is specifically on odor control and its impact on health symptoms. Similarly, moisture levels and reverberation time are related to air quality and acoustics, but they are not direct factors in the immediate discomfort caused by odors. Therefore, the emphasis on reducing headaches and discomfort directly correlates with the benefits of effective odor management in indoor environments.