The way viruses spread from human to human is being reevaluated by scientists and that may have an impact on future ventilation standards.
At the outset of the Covid-19 outbreak, the prevailing belief was that the virus was spread via droplets that quickly dropped out of the air. As researchers studied the virus, however, they realized that it was likely spread via aerosols—smaller, lighter particles that travel further than six feet and can linger in the air in poorly ventilated spaces.
Colds and flu have been thought to be primarily spread via droplets, as well, as they hold more viruses than aerosols. But studies have found that a smaller amount of influenza virus is needed to infect people when inhaled as aerosols rather than sprayed up the nose as saliva droplets.
If this view is correct, improved ventilation could greatly reduce transmission of colds and flu viruses as well as Covid. For this reason, some believe new minimum ventilation standards in buildings should be enacted especially when one considers some 12,000 to 61,000 people annually succumb to the flu.
Related Stories
Codes and Standards | Jan 8, 2020
2019 Oregon Zero Energy Ready commercial code will boost efficiency by 14%
ASHRAE 90.1 is the basis for new code that went into effect Oct. 1.
Codes and Standards | Jan 8, 2020
Energy efficiency initiatives have significantly cut energy consumption per square foot
Lighting and space heating fell by more than 600 trillion Btu from 2003 to 2012.
Building Technology | Jan 7, 2020
Tariff whiplash for bifacial solar modules
Bifacial solar systems offer many advantages over traditional systems.
Codes and Standards | Jan 7, 2020
New certification program for rigid core luxury vinyl tile
ASSURE CERTIFIED to establish industry-wide quality standards.
Codes and Standards | Jan 7, 2020
Boston’s beefed up wetlands ordinance will limit development
Conservation commission must consider future climate impacts when assessing new projects.
Codes and Standards | Jan 6, 2020
States pick up the slack in efficiency policy as federal government lags
With climate change deniers setting policy in Trump Administration, progress continues in statehouses.
Codes and Standards | Jan 6, 2020
OSHA plans multiple revisions to rules impacting construction industry in 2020
Cranes and derricks, welding in confined spaces, beryllium exposure, and more on docket.
Codes and Standards | Jan 3, 2020
Labor supply and capability of workers worry contractors
Three out of four firms plan to add workers in 2020.
Codes and Standards | Jan 3, 2020
Car-free streets could become common in major cities
New York and San Francisco establish thoroughfares dedicated to transit, pedestrians.
Codes and Standards | Jan 2, 2020
CRE professionals have increased interest in embodied carbon accounting, smart buildings
Survey also shows that interest in resiliency lags behind.