A gram of activated carbon can have a surface area in excess of 5,400 sq ft, with 32,000 sq ft being readily achievable. (Wikipedia On Activated Charcoal) Pretty much every air purifier has an activated carbon filter. What does it do and what does “activated” actually mean? We’ll look into what an activated carbon filter … Read more
Air purifiers are powered by electricity. As with any electric appliance, we need to take the power consumption of air purifiers into the account. One of the most common questions about air purifiers is this: Do air purifiers use a lot of electricity? It’s recommended to run an air purifier 24 hours per day. That … Read more
Here is the basic distinction between HEPA and HEPA filters: HEPA is a standard, developed by DOE. HEPA stands for High-Efficiency Particulate Air. Filters that meet that standard are referred to as HEPA filters. HEPA filters are nothing more (or less) than filters that meet the HEPA standard, put forward in 1983 by the US … Read more
“When inhaled, ozone can damage the lungs. Relatively low amounts of ozone can cause chest pain, coughing, shortness of breath and, throat irritation.” (EPA on ‘Ozone Generators that are Sold as Air Cleaners’) We all know the ozone layer. It’s the protecting shield in the Earth’s stratosphere. That’s the good ozone. What is the ‘bad’ … Read more
CFM or Cubic Feet per Minute is a unit for airflow we use in HVAC calculation. Most commonly, we need to calculate CFM for a room for fans, air purifiers, air conditioners, and so on. Example of a question LearnMetrics’s received: We have a 300 square foot standard bedroom. How much CFM should a fan … Read more
Here’s the outtake: Air purifiers clean the air, humidifiers make the air wetter when it’s too dry. There is some confusion when it comes to air purifiers vs humidifiers. Some people even wonder if an air purifier is the same thing as a humidifier, ie “Is an air purifier the same as a humidifier?” An … Read more
Where to place an air purifier? In the bedroom, of course. According to the EPA, we spend up to 90% of our time indoors (alongside the 2x to 5x more polluted air than outdoors). At least 8 hours per day is spent in the bedroom (if we’re lucky). That’s why bedroom air purifiers are the … Read more
0.003 microns. Among everything that is special about the Swiss-made IQAir HealthPro Plus air purifier, this number is at the top. It’s the reason why IQAir HealthPro Plus is often called the ‘#1 Rated Air Purifier For Allergies And Asthma‘. The width of a single human hair is about 75 microns. As we’ll see in … Read more
Large rooms need large room air purifiers. Large rooms can accumulate large amounts of air pollutants. You could put 2 or more small air purifiers in a big room, and remove dust, pollen, smoke, and other air pollutants. Better still, however, is to do the most obvious thing: Get a big air purifier for a … Read more
It’s about the air we breathe. If the promise of an air purifier were true, it would make an air purifier an essential appliance for every home. The reason is simple: We care about the quality of air we breathe. Adults make about 15 breaths every minute. That’s almost 1000 breaths per hour. If we’re … Read more