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 | Jun 11, 2020
USGBC offers new pilot credit to address green cleaning and COVID-19
Provides guidance on cleaning and disinfecting buildings using green cleaning best practices.
Codes and Standards | Jun 10, 2020
AIA issues tools for reducing risk of COVID-19 transmission in buildings
Tailored strategies offered for offices, retailers, schools, and senior living facilities.
Codes and Standards | Jun 8, 2020
OSHA construction safety inspections fall 84% during COVID-19 pandemic
Agency focuses on preventing disease transmission in healthcare industry.
Codes and Standards | Jun 8, 2020
5 must reads for the AEC industry today: June 8, 2020
Frank Lloyd Wright sites set to reopen and construction jobs rise by 464,000.
Codes and Standards | Jun 8, 2020
Reopened offices raise liability risk for businesses and owners
Risks may not be covered by property insurance.
Codes and Standards | Jun 4, 2020
American Wood Council updates report on fire resistance of wood members and assemblies
Provides new examples and background on mass timber calculations.
Codes and Standards | Jun 3, 2020
Virginia makes GCs liable for subs employee wages
New law allows workers to sue GCs for wages in class action.
Codes and Standards | Jun 2, 2020
Designers, owners reinventing restaurants to cope with COVID-19
Options include rearranged seating, mobile ordering, designated flow spaces.
Codes and Standards | Jun 1, 2020
How owners should comply with OSHA roofing safety guidelines
Buildings should have fall protection and restraint provisions for those who go on roofs.
Codes and Standards | May 29, 2020
AIA releases new, updated sustainable project documents
Streamlined sustainable design and construction process included.