Question: how much does it cost to run an air purifier?
Answer: Depending on the airflow speed, Most HEPA air purifiers consume around 50-100 watts per hour. With 12 hours of daily operation, the electricity will be around $3-5 a month or $36-60 annually. With 24 hours operation, you just need to multiply the numbers by 2 so the cost would be at $6-10 a month or $72-120 annually.