Ventilation for Acceptable Indoor Air Quality
- Breathe Free USA
- Nov 27
- 1 min read
The experts on indoor ventilation systems determined that there is no ventilation system capable of eliminating cannabis smoke or vape.
Borrowing a quote from this California Department of Public Health publication (p. 2),
"In 2015, the American Society of Heating, Refrigeration and Air-Conditioning Engineers (ASHRAE), the organization that develops engineering standards for building ventilation systems, expanded their definition of Environmental Tobacco Smoke (ETS) to include marijuana smoke and the emissions produced by electronic smoking devices. ASHRAE concluded that ventilation systems cannot eliminate ETS.."
Sources:
The expansion of the definition of ETS can be found here:
Definition of ETS listed on p 3::
"environmental tobacco smoke (ETS): the 'aged' and diluted combination of both side-stream smoke (smoke from the lit end of a cigarette or other tobacco product) and exhaled main-stream smoke (smoke that is exhaled by a smoker). ETS is commonly referred to as secondhand smoke. This definition includes smoke produced from the combustion of cannabis and controlled substances and the emissions produced by electronic smoking devices."
