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Search authoritative resources that support practical understanding of indoor conditions, environmental measurement, ventilation, particles, and shared environments.
8 resources shown
U.S. Environmental Protection Agency
An official overview of indoor environmental conditions, common pollutant sources, ventilation, moisture, and exposure.
EPA reports that Americans spend approximately 90 percent of their time indoors and that indoor conditions are influenced by activities, building operation, and outdoor air.
U.S. Environmental Protection Agency
Explains the factors that affect air within and around buildings and practical approaches to understanding indoor conditions.
Source control, ventilation, and filtration are among the strategies EPA discusses for addressing indoor pollutants.
U.S. Environmental Protection Agency
Explains particle sizes, indoor and outdoor sources, and approaches for reducing particulate matter indoors.
Particles can come from indoor activities and outdoor air, and their behavior varies by size, source, ventilation, and filtration.
World Health Organization
A global overview of indoor and outdoor air pollution and the importance of reducing unnecessary exposure.
WHO identifies particulate matter and several gases among pollutants of public-health concern.
World Health Organization
Evidence-based global guidance covering particulate matter, ozone, nitrogen dioxide, sulfur dioxide, and carbon monoxide.
The guidelines provide population-level reference values and are not a certification framework for a specific building or CLARVON measurement.
National Institute for Occupational Safety and Health
Workplace-oriented information about ventilation, building conditions, and environmental factors that can affect occupant concerns.
Indoor environmental investigations require context, building information, and appropriate professional evaluation.
Peer-reviewed research · Building and Environment
A year-long study of PM2.5 in 37 office buildings across four countries with mechanical or mixed-mode ventilation.
The study examines how ventilation and filtration configurations relate to indoor PM2.5 under real operating conditions.
Peer-reviewed research · Atmosphere
Research examining indoor PM2.5 behavior with mechanical ventilation under varying outdoor conditions.
The findings illustrate why ventilation, outdoor air, and filtration context matter when interpreting environmental measurements.
External resources are provided for education. Inclusion does not imply endorsement of CLARVON or validation of a specific product, measurement, or result.