Indoor air quality (IAQ) represents a significant but underappreciated environmental health exposure — Americans spend 90% of their time indoors, and WHO estimates indoor air pollution causes 3.8 million deaths annually worldwide from exposure to cooking fires, biomass combustion, and building material off-gassing. In developed-country healthcare settings, the relevant exposures are more subtle but clinically meaningful: volatile organic compounds (VOCs) from cleaning products, fragrances, and building materials; fine particulate matter infiltrating from outdoor sources plus indoor combustion (cooking); and in some buildings, mold, radon, and per- and polyfluoroalkyl substances (PFAS) from water-repellent building materials.
Healthcare Worker Occupational Exposures
Healthcare facilities are workplaces with distinctive chemical exposure profiles: disinfectant cleaning products (quaternary ammonium compounds, hydrogen peroxide, glutaraldehyde, peracetic acid) are necessary for infection control but produce occupational respiratory exposures with documented effects on asthma prevalence and lung function in healthcare workers. Healthcare workers exposed to high concentrations of cleaning products have significantly higher rates of asthma (odds ratio 1.4–2.0) compared to unexposed controls. OSHA's Respiratory Protection Standard (29 CFR 1910.134) and the Hazard Communication Standard cover these occupational chemical exposures — requiring appropriate ventilation, PPE, and SDS documentation. Our PPE catalog includes chemical-resistant gloves and appropriate respiratory protection for healthcare cleaning and disinfection staff.
HEPA Filtration: The Evidence
HEPA (High-Efficiency Particulate Air) filters remove ≥99.97% of particles ≥0.3 μm — capturing PM2.5, bacterial aerosols, and allergens. Evidence for health benefit from portable HEPA air purifiers: a 2019 RCT in Lancet Planetary Health demonstrated portable HEPA filtration in homes significantly reduced cardiovascular biomarkers (BP, CRP, fibrinogen) and respiratory symptoms in non-smoking adults over 5 days — one of the strongest direct human endpoint studies. For patients with asthma, COPD, or cardiovascular disease, portable HEPA filtration recommendation has evidence support. In healthcare settings, HEPA room air purifiers reduce transmission of airborne pathogens (relevant for airborne precaution rooms and COVID exposure reduction) and reduce surgical site infection risk when used in OR environments. For respiratory-sensitive patient populations and healthcare workers, our respiratory section and PPE catalog include filtration products supporting clean air objectives.
