Activated Carbon Filters: Everything You Need To Know

activated carbon filter in the making

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

What Is A HEPA Filter? How Does It Work? (4 Mechanisms)

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

What Do EPA, CDC, And FDA Say About Ozone Generators? (Overview)

ozone generators and their effects

“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

How Many CFM Do I Need For 100-3,000 Sq Ft Room? (Calculator)

formula that calculates CFM based on area height air changes per hour

CFM or Cubic Feet per Meter 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 for … Read more

8 Differences Between Air Purifiers vs Humidifiers (Comparison)

comparison between air purifier vs humidifer

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. They’s are not. In fact, there are several differences between a … Read more

IQAir Air Purifier: HealthPro Plus Reviewed And Rated (2021)

assessment of iqair healthpro plus air cleaner for allergies

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