This blog post reviewed the Xiaomi air purifier model 3H. Currently in the market, you hardly can find the old model but just in case you are curious, the 3H model is better than its 2S model in the following aspects:
Effective area: Now 32 to 48 meter square (increased by 29%)
CADR (Clean Air Delivery Rate): Now 400 meter cube / hour (increased by 30%)
Improved wind path system.
Increased wind output.
Lower noise generated.
It is also better to get 3H as compared to the 3C model because it is easier to buy the extra filter for 3H as rather than 3C..
The air purifier is quite small and compact compared to other models.
The dimension is 24cm (width) x 24cm (depth) x 54cm (height). It weight about 4.8Kg (including filter).
It can also tell you the current state of your surrounding air condition, which I find it useful.
I also like that it can also connect to the Mi app to control the device.
If you are thinking of buying an air purifier for your study room or bedroom, then this is definitely a good choice!
PSI stands for ‘Pollutant Standards Index’. It is an index to provide accurate and easily understandable information about daily levels of air quality.
PSI is computed based on 24-hour average of PM2.5 concentration levels, among other pollutants. PM2.5 is the dominant pollutant during haze episodes.
The ambient air in Singapore is monitored through a network of air monitoring stations located in different parts of Singapore.
The monitoring stations measure concentration levels of particulate matter (PM10), fine particulate matter (PM2.5), sulphur dioxide (SO2), nitrogen dioxide (NO2), ozone (O3), and carbon monoxide (CO). These six pollutant parameters determine the PSI.
The PSI value gives an indication of the air quality as shown: