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
| Jan 18, 2012
California approves open cell spray foam for energy efficiency standards
The California Energy Commission (CEC) now recognizes open-cell spray foam as an accepted insulation in its 2008 Building Energy Efficiency Standards.
| Jan 5, 2012
Building to LEED standards now an 'easy call' from cost standpoint
Once seen as a cost burden, building to LEED standards is now an "easy call," according to Dan Probst, chairman of energy and sustainability for real estate management and development firm Jones Lang LaSalle.
| Jan 5, 2012
Minnesota's GreenStep Cities program aids communities in winning grants
GreenStep Cities, a Minnesota initiative, was designed to provide greater recognition to the state's communities for achievements in meeting sustainability standards and goals.
| Jan 5, 2012
Some ADA accessibility rules change in 2012
Some changes to the Americans with Disabilities Act go into effect beginning March 15, 2012.
| Jan 5, 2012
Ontario's stringent energy code has builders concerned over indoor air quality
Some Ontario builders are worried that new building code requirements with stricter energy efficiency measures could lead to poor indoor air quality.
| Jan 5, 2012
New law bars Defense Department from new LEED certifications
The Defense Department will not be allowed to use any money to certify its buildings LEED Gold or Platinum, under a law President Obama signed Dec. 31.
| Jan 5, 2012
Some ADA accessibility rules change in 2012
Some changes to the Americans with Disabilities Act go into effect beginning March 15, 2012.
| Jan 3, 2012
New SJI Rule on Steel Joists
A new rule from the Steel Joist Institute clarifies when local reinforcement of joists is required for chord loads away from panel points. SJI members offer guidance about how and when to specify loads.
| Dec 29, 2011
OSHA enforcing new fall hazard standards
OSHA is enforcing its new fall protection standards, as evidenced by a recent crackdown in New York.
| Dec 29, 2011
NRCA offers program on new fall-protection requirements
The National Roofing Contractors Association's (NRCA's) program "Roofing Industry Fall Protection from A to Z" will be held Feb. 21 during the organization's 125th Annual Convention.