PurpleAir Blog | Making Air Quality Accessible For All

  • What Air Exchange Rate is & And Why It Matters

    We often don't think about it, but every day millions of cubic feet of outdoor air cycle through our homes and offices. Learn how the air exchange rate affects indoor air quality and how to improve it in your own home or workplace. 
  • 10 Air Quality Terms You Need to Know

    When it comes to air quality, there can be a lot of technical terms and jargon you need to know. As with any science, it’s important to define these terms so we all have the same understanding and language when we communicate. Learn about important air quality terms in this article.

  • What is Temperature Inversion? | The Different Types, Causes, & Effects

    Have you ever seen smog linger over a city? Well, this is often caused by a Temperature Inversion, and it’s a deviation from the normal meteorological phenomenon. Learn what it is, what causes it, and how it impacts our environment.
  • Tracking Particulate Matter: Federal Reference Method (FRM) or Federal Equivalent Method (FEM)?

    With growing awareness of the potential impacts and effects of air pollution, federal agencies are strapping down and taking more diligent measures to track ambient particle concentrations. The US Environmental Protection Agency (EPA) is constantly redefining safe parameters of the national ambient air quality standards (NAAQS). One of the most concerning airborne pollutants tracked is fine particulate matter, particularly Particulate Matter 2.5 (PM2.5).