At the outset of the SARS-CoV-2/COVID-19 outbreak in China, researchers identified an airconditioned five-story windowless restaurant common to ten cases of infection. The study concluded the key factor for infection was the direction of the airflow. The researches also stated, “Virus transmission in this outbreak cannot be explained by droplet transmission alone.” Ventilation, the lack …
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IAQ: Relative Humidity
Air expands when heated and contracts when cooled. In the picture to the right, the test tube and the beaker both contain .5 ounce of water. The test tube volume represents dense cool air. The beaker volume represents expanded warm air. In this visual example, the relative humidity of the beaker is 10%. Contrast this …
IAQ: Ventilation
Ventilation Is Important The American Society of Heating, Refrigerating, and Air-Conditioning Engineers (ASHRAE) underscores the importance of ventilation and air filtration in reducing the transmission of COVID-19 through the position statement: “Transmission of SARS-CoV-2 through the air is sufficiently likely that airborne exposure to the virus should be controlled. Changes to building operations, including the …
IAQ: Airborne Pathogens—The Problem
Do you worry about COVID-19? Here is more to worry over. Our human nature wants tangible, visible evidence of threats to our persons. This works to our good when a threat is a reckless driver or a pothole in a road. But airborne pathogens are invisible threats. The graphic depicts the relative sizes of a …
IAQ: Air Filtration
Definition of air filter: a porous substance that allows air to pass but retains suspended solid particles What about masks? There are three air filters featured in the above picture but only one is called an air filter, the one in the return air stream of the HVAC system. But, the vacuum cleaner bag and …
COVID-19: The Spread
Originally posted 4 June 2020 | Updated 1 Sep 2020 The experts call for ‘social distancing’ of between three and six feet between persons. Can we talk? Do you know why droplets are called droplets? The word formed by the first four letters is your clue: they are heavier than air. Gravity causes them to …
Maskuerade: What is the efficacy of your chosen facial covering?
How does your choice of mask work for you?
Is Your Fear the Product of an Imbalance of the Facts?
News media companies stoke public fears over the specter of death by the dreaded coronavirus.
If the deaths attributed to the novel coronavirus overwhelm Texas morgues, what do they do with the much greater number of bodies that died from the leading causes of death? Leave them by the curb?
If You Have Megawatts of Wind Power, What More Do You Need?
What is the true cost of renewable energy in Texas? You don’t know?
Back To School – Why?
Texas public school students are not dying from COVID-19. They are dying from something truly horrendous.
Is there an alternative to keeping public school classrooms vacant?
Yes, and it’s up to the school administrators to want to restore
John N. White 