Test and analysis on anti-haze effect of domestic air purifiers under severe haze condition

In order to understand the actual purification effect of the domestic air purifier, measures and analyses the purification performance of two domestic air purifiers with HEPA filters and different costs under the condition of severe haze in a residence in Beijing. Test results show that the purification effect of the air purifiers with HEPA filters is very remarkable, with indoor suspended particles concentration falling by 75% to 98% after two hours operation. The purification effect is the best for the particle size of 0.3 to 5.0 μm, and the concentration of fine particulate matter (PM2.5) decreases by 97.5%, reaching the excellence level of below 35 μg/m3. Using HEPA air purifiers is an effective anti-haze measure for the residence, and the cost and purification performance are not proportional. The low cost and high quality China-made products can also achieve good purification and anti-haze effect.