To see how effectively these machines clean the air, we inject smoke and dust right into a sealed chamber and utilize a particle counter to evaluate the change in air particle concentration during the room because the exam design operates for 15 minutes. We test applying particles as modest as https://sound-social.com/story6724832/how-much-you-need-to-expect-you-ll-pay-for-a-good-does-air-purifier-help-with-covid