@amandalhu You need 20-30 CFM CADR per student to replicate the conditions of the Italy study showing an 80% reduction in infection rate (cited in the paper as 10-14 L/sec). With your numbers that going to be somewhere in the neighborhood of 100 W +/-, or about 1 kWh/day. So pennies.
@amandalhu 每个学生需要 20-30 CFM CADR 才能复制意大利研究的条件，表明感染率降低了 80%（论文中引用为 10-14 L/秒）。您的数字将在 100 W /- 附近，或约 1 kWh/天。所以几分钱。