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 | Nov 28, 2018
To build water-efficient cities, water managers and urban planners must coordinate better
Lack of time and resources, and practitioners not in habit of working together hamper efforts.
Codes and Standards | Nov 27, 2018
AAMA updates specification for roller assemblies in sliding doors, and lift and slide doors
Last update was in 2015.
Codes and Standards | Nov 26, 2018
All LEED-certified buildings eligible for LEED recertification
Projects must submit 12 months of data demonstrating continued or improved performance.
Codes and Standards | Nov 20, 2018
OSHA publishes updates to crane operator certification requirements
Long-delayed rules accept certifications by type or type and capacity.
Codes and Standards | Nov 19, 2018
Guide offers understanding of elements that create successful multi-floor communal spaces
CTBUH technical document analyzes how to approach tall urban habitat.
Codes and Standards | Nov 16, 2018
2018 International Green Construction Code released
Updated version helps governments streamline code development and adoption.
Codes and Standards | Nov 15, 2018
New versions of DOE’s EnergyPlus engine and the OpenStudio software development kit released
New offerings resolve over 70 bugs and offer new features.
Codes and Standards | Nov 14, 2018
Obsolete safety standards may have been used in cleanup of former naval shipyard
San Francisco redevelopment site work may have been racked by fraud.
Codes and Standards | Nov 13, 2018
New York City’s new construction safety requirements are delayed
Some contractors say they weren’t ready for ‘massive initiative’.
Codes and Standards | Nov 9, 2018
Cities have multiple strategies to reduce parking requirements
Each community has to find its own mix of solutions.