Does the air purifier really filter the air effectively?
1. At what level is air pollution harmful to health?
The two dust indexes that are most interested in today are the PM2.5 and PM10 dust indexes. PM2.5 is superfine dust particles with the size of 2.5 micrometers or less, and PM10 is particles of size 10 micrometers or more. In particular, PM2.5 is the most ominous type of dust because they penetrate directly into the lungs and cause a series of diseases such as stroke, heart attack, lung disease including lung cancer.
The air quality monitoring organization AirVisual has just announced the list of the most polluted countries and cities in the world in 2018. In Hanoi, the amount of PM2.5 dust is 40.8µg/m3, ranking second in the list. most polluted city in Southeast Asia. City. Ho Chi Minh City has a PM2.5 dust concentration of 26.9 µg/m3, ranking 15th on the list of the most polluted cities in Southeast Asia.
According to the World Health Organization (WHO), reducing the concentration of PM2.5 dust from 35 micrograms/m3 to 10 micrograms/m3 can reduce the risk of death from air pollution by about 15%.
2. Test environment
The research team installed this air conditioner in a bedroom with an area of about 18 square meters in an apartment in Cau Giay district – Hanoi, a few hundred meters away from the installation location with another apartment building under construction. This room area is slightly larger than the capacity of 9200 BTU (suitable for room 15m2 back) of the air conditioner. Therefore, the test results in this article may be better if the room size is more suitable.
The test device is a specialized air dust concentration meter HT9600 that measures dust in PM2.5 and PM10 sizes along with temperature, noise and electrical meters to test other functions of the air conditioner.
3. Measure the air quality before and after turning on the air conditioner
Through testing with different time frames from 30 minutes to 8 hours continuously overnight, this LG air conditioner shows the ability to effectively filter dust, especially when running overnight.
The first test was done around 4pm on a sunny day in Hanoi. Before testing, the actual dust concentration in the room with PM2.5 index was 49 micrograms/m3 and PM10 index was 149 micrograms/m3. At that time, the control panel on the LG air conditioner displayed a yellow warning, ie the air quality is at a level that is not very good for health.
After 15 minutes of turning on the air conditioner, the PM2.5 and PM10 readings had decreased by about 40% in both indices, to 30 micrograms/m3 with PM2.5 and 91 micrograms/m3 with PM10. After half an hour, the dust level continued to decrease sharply, the PM2.5 index was only 26 micrograms/m3 and PM10 was 78 micrograms/m3, meaning the dust level was reduced by half compared to the original.
Next, the research team performed with a longer time of 8 hours to see the dust filtering effect when the air conditioner was turned on overnight. Before turning on the air conditioner, the dust concentration in the room exceeded the safe threshold, the PM2.5 index was 57 micrograms/m3 and the PM10 index reached 911 micrograms, at a serious pollution level.
After 8 hours of running the air conditioner, both dust indicators in the room decreased very impressively. The PM2.5 index is only 4 micrograms/m3 and the PM10 index is 26 micrograms/m3. At this time, the control panel displays a blue message, which means that the air in the room is very safe and fresh.
Not only in cooling mode, even dehumidifying mode (Dry) or just turning on the blower, this air conditioner also filters dust similarly. In addition to two types of dust PM2.5 and PM10, this air conditioner also filters PM1.0 dust of smaller size.
4. Measure noise, power consumption and cooling efficiency
LG V10APFN air conditioner also works quite economically, runs smoothly and has good cooling effect. We tested 2 times running the air conditioner for 8 hours overnight: once set the room temperature to 26 degrees for high fan and one time to 27 degrees to automatically blow the fan. On both nights, the air conditioner maintained a stable room temperature exactly with the level set on the remote. The machine also runs smoothly, the noise level measured at the low fan level is 38dB, the average fan is 41dB and the highest fan level is 47dB.
Regarding electricity consumption, the air conditioner used 0.784 electricity on the day the temperature was set to 27 degrees and 0.938 electricity on the day the temperature was set at 26 degrees. Simply put, this air conditioner will use about 24 to 29 electricity numbers per month if turned on for 8 hours a day, equivalent to about 60-95 thousand VND depending on the general electricity consumption of the family.
Thus, through the experiments of the experimental group, it can be seen that the LG V10APFN air purifier is really effective in filtering small and microscopic dust, bringing a cleaner atmosphere and helping to reduce significant risk of respiratory diseases caused by dust.