How To Measure Air Quality

Like all things, we can measure air quality scientifically. We can get a number that says just how gross the air in your facility is. Not only that, but we can figure out what particular type of problem your air has. There’s more to air quality than just saying it’s good or bad. The Troublemakers There are three commonly examined areas for air quality. We have different ways to detect and measure each of them, but these are typically available all in one tool or device. Particulate Matter There are tiny particles in the air, often harmful chemicals we don’t notice individually. Think of things like the exhaust from a car. That exhaust is made of billions of tiny particles of burned fuel and even metal shavings from the engine. These can have negative health effects. Particulates from cars could play a role in Alzheimers Disease. These can detect bacteria, viruses, and mold as well. Sensors for these are rated in their measuring sizes, 2.5 microns and below, 10 microns and below, etc. Your hair is about 40-70 microns thick, for comparison. Volatile Organic Compounds The rule of thumb is that a VOC is something you smell and notice. That’s not always the case, but it’s a good guiding post. These chemicals are highly reactive, dangerously so. Examples of these are things like cleaning chemicals, gasoline, and paint. They’re things you should try not to breathe in. Carbon Dioxide This […]

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The Origins of the HEPA Filter: Nuclear Research

There has been some… grim news recently about a possible war between the US and North Korea over their developing nuclear capabilities. There is a ray of light though, in this grim news. It gives us an excuse to talk about HEPA Filters. It turns out, they were created specifically because of nuclear research and the fall out of nuclear weapons.   Filters Before HEPA Air filters have been around for a long time. The first air filters can be traced all the way back to the 1500s, a primitive respirator to protect the wearer from gases, dust, and fumes. Damp-cloth respirators started to come around in the 18th and 19th century. These used damp wool and valves to filter dust out of the air. The liquid-based approach would end up expanding to water and oil bath systems that essentially washed the air. Most contaminants would end up dissolved or pushed down in the water, while the air could eventually pass through. This technology was used on cars, trucks, tractors, and even some early air conditioning systems. It was pretty much the only known way to clean the air. At the time, there were no electron microscopes and the concept of cells and bacteria was still pretty new. There simply hadn’t been research into all the little things in the air and how effective or ineffective the existing filters were beyond subjective opinions. In the 1940s, there came a very […]

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