What are the drawbacks of HEPA air purifier?
• Only clean a small portion of the room as the air must pass through the filter in order to be cleaned. • HEPA filters should be tested at least annually and some might even need annual calibration. • Replacement filters can cost as much as $200. • Uses fan so it’s very noisy. • High electricity cost about $300 annually. • Only filter pollutant larger than 0.3 micron.
