While Dyson’s Pure Cool air purifier looks impressive, a closer examination of its Clean Air Delivery Rate (CADR) exposes a rather bad performance. The Dyson TP05 Pure Cool passed a mere 164m³/hr in CADR. That means the Dyson Pure Cool air purifier out as much clean air as a $20 …
Most purifiers on the market come with a pre-filter. That would make one think that pre-filters must be a good thing, right? However, most purifier companies also love to sell people 6-stage filtration, or no – 7-stage filtration! But the science behind purifiers is surprisingly simple. Two types of filters …
The costs of replacement HEPA filters for air purifiers can quickly add up. A quick search on Amazon reveals some HEPA filters that cost hundreds of dollars. Should HEPA filters cost this much? Put simply: No! Read on to learn why HEPA filters shouldn’t be expensive, but why some companies …
Every year, as winter blankets India, over a billion people find themselves navigating through streets filled with toxic, polluted air. Whether in Delhi, Mumbai, Kolkata, or Hyderabad, the question on everyone’s mind becomes: Do face masks and air pollution masks truly offer protection? Throughout India, I’ve encountered intelligent, skeptical individuals …
When I started Smart Air in 2013, I wanted to buy an air quality monitor. I had two options. I could buy a US$260 Dylos or spend thousands of dollars on the crazy expensive particle counters. Since then, the market has exploded with new air quality monitors as cheap as 99 …
Data shows face masks can protect you from COVID-19, but how about air purifiers? Can an air purifier with HEPA filters remove COVID-19 and other viruses? Can Air Purifiers and HEPA Filters Remove COVID-19 Virus? To answer this question, we need to first answer if HEPA filters can capture particles …
HEPA filters are great at filtering particles such as dust, PM2.5, and PM10. They also do an incredible job of capturing nanoparticles including bacteria, COVID-19, and other viruses. What HEPA filters don’t do though, is destroy the particles. This has led to a lot of marketing hype and confused air …
Data shows that improving indoor ventilation can reduce the risk of virus transmission, and is recommended by the CDC. But what are the recommended air changes per hour for different spaces? In this article, we’ll cover the recommended ASHRAE recommended air changes per hour for offices, homes, schools, residential and hospitals, using …
With Covid-19, many of us are wondering how to properly clean our masks. Google searches for “wash N95 mask” and “wash KN95 mask” have sky-rocketed. Yet data-backed answers seem to be in short supply. The usual advice is to toss and replace masks instead of washing them. Let’s dive into …
The term “HEPA filter” can be confusing. What does HEPA stand for? What is a HEPA filter made from, and what actually makes it a HEPA filter? What does HEPA Stand for? “HEPA” stands for “high-efficiency particulate air” (filter). It sounds complicated, but HEPA air filters are nothing fancy. They …
