Have you ever noticed the smell of alcohol in the clinic, or the chemical smell of newly painted room? They are volatile organic compounds, which quickly evaporated from their liquid form when exposed to air, filling the air with their unique chemical odour. They might...

A spray of water in the air from the water spray misting fan is always cooling on a hot weather. Malaysians appreciate the cooling effect of water in our hot tropical climate very much. However, is it possible to have too much water in the air? Is it possible to mainta...

Carbon dioxide is usually tracked to mitigate issues related to global warming. However, it is also a very important element to measure during indoor air quality assessment because it gives us a big picture of the ventilation condition of the building, in order to inve...

Compared to other odorless air pollutants, formaldehyde is easily noticed with its distinct odor, but that does not make it less dangerous because it can be found in almost every indoor environment at a low concentration. At high concentration, formaldehyde can be even...

In year 1970s, many buildings are designed to reduced ventilation rate in order to maintain the indoor environment more efficiently and save electricity due to the energy crisis that happened. The construction of buildings with energy-efficient air conditioning system...

Resulting from incomplete combustion, harmful carbon monoxide is produced instead of carbon dioxide. Even though it is mainly found outdoor where there are heavy traffic, it can get into the building through windows or outdoor air intake through ventilation system. Car...

Being known for shielding the earth from harmful radiation, the detrimental effects of ground-level ozone towards living organisms are not commonly known. Here's an infographic that gives an overview of how ozone is formed, what it does to us and what we can do to redu...

PM2.5 is particulate matter with size less than 2.5 microns (0.0025 mm) which can be consisted of a mixture of chemical including carbon, organic matter, or even heavy metal released directly from a source or as a by-product of chemical reactions. Even though there is...

Smoke box is a common tool used to evaluate the efficiency of an air purifier to clear up suspended particulate matter in the air by taking into account the time taken for the air in the smoke box to turn from cloudy to clear. With its 360 degree air intake, HealthWay...

Being able to suspend in the air for a long period of time, PM2.5 is a key factor that causes or worsens several major health concerns due to its tiny size which is unable to be seen with naked eyes. Here's an infographic that gives an overview of how harmful PM2.5 is:

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