Bangkok PM2.5 air quality averaged 23.3 micrograms in 2022. This means Bangkok PM2.5 concentrations exceeded the WHO annual limit of 5.0 micrograms by a little under 5 times. On the most polluted day, Bangkok air quality exceeded the recommended limit by a little under 20 times. Current Air Quality in …
Delhi PM2.5 air quality averaged 91.7 micrograms in 2022. This means Delhi PM2.5 concentrations exceeded the WHO annual limit of 5.0 micrograms by over 18 times. On the most polluted day, Delhi air quality exceeded the recommended limit by a little under 72 times. Current Air Quality in Delhi Air …
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 is a HEPA Filter? “HEPA” stands for “high-efficiency particulate air” (filter). It sounds complicated, but HEPA air filters are nothing fancy. They …
With the outbreak of the coronavirus, many people are wondering if masks capture coronavirus particles. It’s a lot to ask billions of people around the world to become mask experts overnight. There is a lot of conflicting information. Do surgical masks capture coronavirus particles? Media outlets like US National Public …
Data shows that improving indoor ventilation can reduce the risk of virus transmission, and is recommended by the CDC. In this article, we’ll cover the ASHRAE recommended air changes per hour for offices, homes, schools, residential and hospitals, using the ASHRAE 62.1 and 62.2 guidelines. ASHRAE Recommended Air Changes Per …
Covid-19 has led to a new surge in interest in how to clean and disinfect 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 standard guidelines say to throw masks out and use new ones. I.e. …
Beijing PM2.5 air quality averaged 30.2 micrograms in 2022. This means Beijing PM2.5 concentrations exceeded the WHO annual limit of 5.0 micrograms by over 6 times. On the most polluted day, Beijing air quality exceeded the recommended limit by a little under 31 times. Current Air Quality in Beijing Air …
Mask standards can be confusing: N95, KN95, FFP1, FFP2, P2, or surgical mask? This quick run-down of mask specifications covers mask types, mask ratings, and their effectiveness at filtering particles. First off, let’s start with mask types (or certification types). In general, there are 3 types of commonly used, disposable …
3M has been selling air conditioner (AC) filters that can be added to the inlet of ACs for some time now. 3M markets them as being simple and easy to attach, and a great way to reduce PM2.5 in homes without an air purifier. But do they actually work? How …
Poor indoor air quality is a common in homes and offices around the world. Poor air quality can affect the health, mood and productivity of those indoors. Here are three different ways to improve indoor air quality, and the advantages of each. Indoor Air Quality Overview: Before we get to …
