laundrylist 提问: What is the energy usage associated with running a cheap box fan for eight hours at night versus the two expensive models that you compared your cheaper model to?
Excellent question! I’ve wondered about that myself. The fan is 50 Watts, compared to 27-215 for an IQ Air (depending on fan speed). So they are comparable, although the IQ Air is using less energy on the lowest setting.
Thomas is an Associate Professor of Behavior Science at the University of Chicago Booth School of Business and the founder of, a social enterprise to help people in China breathe clean air without shelling out thousands of dollars for expensive purifiers.