CADR is tested by a certified third party lab, according GV/T18801-2015. Following improvements in our testing method and production quality control, we upgraded the CADR values of our products. Tested on the filter media for 1 pass efficiency at 5.33cm/s air flow, by a third party lab./From the air that passes through the filter, tested to JISB 9908-2015 From the air that passes through the filter, it is a theoretical time for one-time cleaning calculated by dividing its CADR 520m3/h by the room size of 48m3 (assuming the room is 20m2 in floor area and 2.4m in height). The recommended service life for the device is based on a theoretical calculation of the average annual regional values of harmful air particles outdoors and daily use of the air purifier for 16 hours in automatic mode

Microbial Reduction Rate Test at Airmid Healthgroup Ltd. performed in a 28.5m3 test chamber contaminated with airborne influenza A (H1N1). According to the US Environmental Protection Agency (EPA), an air purifier alone does not protect against COVID-19, but it can be part of a plan to protect you and your family Microbial Reduction Rate Test conducted at Airmid Health group Ltd. tested in a 28.5 ㎥ test chamber contaminated with airborne influenza A (H1N1). An air purifier by itself does not protect against Covid-19 but can be part of plan to protect yourself and your family (US Environmental Protection Agency) Microbial reduction rate test at external lab, with appliance running in turbo mode for 1.5 h in a test chamber contaminated with HCoV-229E virus aerosols. While related to it, HCoV-229E is not SARS-CoV-2, which causes COVID-19. The recommended service life for the device is based on a theoretical calculation of the average annual regional values of harmful air particles outdoors and daily use of the air purifier for 16 hours in automatic mode.It is a theoretical time for one-time cleaning calculated by dividing its CADR 170 m²/h by the room size of 48 m² (assuming the room is 20 m² in floor area and 2.4 m in height. From the air that passes through the filter, it is a theoretical time for one-time cleaning calculated by dividing its CADR 190 m³/h by the room size of 48 m² (assuming the room is 20 m² in floor area and 2.4 m in height). CADR is the volume of filtered air given off by an air purifier. It is a measure of the speed of cleaning and a reflection of the airflow times the filter efficiency.

From the air that passes through the filter, tested with NaCl aerosol by iUTA according to DIN71460-1

How do air purifiers work?

According to the U.S. Environmental Protection Agency, an air purifier won't protect you from COVID-19 on its own, but it can be part of a plan to protect you and your family. Philips air purifiers have higher Clean Air Delivery Rate and energy efficiency with a NanoProtect HEPA filter than with a HEPA H13 filter, tested to GB/T 18801. Microbial Reduction Rate: Test conducted at Airmid Healthgroup Ltd. Tested in a 28.5-m3 test chamber contaminated with airborne influenza A(H1N1). Microbial Reduction Rate Test at external lab, in a test chamber contaminated with avian coronavirus (IBV) aerosols, with Philips HEPA NanoProtect filter. For example, if the air flow is 500 m3 / h, the filter efficiency is 50%, CADR is only 250 m3 / h - and only delivers 250 m3 of clean air in an hour.

The recommended service life for the device is based on a theoretical calculation of the average annual regional values of harmful air particles outdoors and daily use of the air purifier for 16 hours in automatic mode.An air purifier by itself does not protect against Covid-19, but can be part of a plan to protect yourself and your family (US Environmental Protection Agency) Philips air purifiers have higher Clean Air Delivery Rate and energy efficiency with a NanoProtect HEPA filter than with a HEPA H13 filter, tested to GB/T 18801 verifyErrors }}{{ message }}{{ /verifyErrors }}{{ As with the H1N1 virus, we have started working with renowned partners to prove the effectiveness of our air purifiers in removing coronavirus aerosols. Previously, through independent tests, Philips has proven that its air purifiers reduce the concentration of influenza A (H1N1) virus aerosols in the air passing through the filter by 99.9%.