How long should I run my humidifier each day to ensure optimal humidity levels in my living space? Is there a specific duration that most experts recommend for the effective functioning of these devices, particularly in relation to different climates and seasons? Should I consider the square footage of the area I am trying to humidify, and how does that factor into the overall running time? Furthermore, is it possible that excessive usage could lead to negative consequences, such as mold growth or health issues? As I contemplate the right amount of time, should I also take into account the specific type of humidifier I possess, such as an evaporative model versus an ultrasonic one? What strategies might I employ to ascertain the ideal duration, ensuring that I not only achieve a comfortable ambiance but also maintain the health of my household? Is there an optimal range of humidity that I should target during different parts of the day?