Fundamental practices for infectious disease risk reduction This section describes ongoing fundamental best practices and behaviors that should be followed routinely to reduce the risk of infectious disease transmission in buildings, including during non-crisis periods. Encourage employees and visitors to stay home when sick A fundamental strategy to prevent the spread of disease starts before Read More »


1.  Allen, J. G., Bernstein, A., Sita, E., Flanigan, S., Gokhale, M., Goodman, J. M., … Yin, J. (2017). The 9 Foundations of a Healthy Building. Retrieved from 2. EPA. 2019. Volatile organic compounds impact indoor air quality. Accessed on 2/7/2020. Retrieved from: 3. Costa, L.G., Giordano, G., Tagliaferri, S., Caglieri, A. and Read More »

References and Citations

[1] J.G. Allen, P. MacNaughton, U. Satish, S. Santanam, J. Vallarino, J.D. Spengler, Associations of Cognitive Function Scores with Carbon Dioxide, Ventilation, and Volatile Organic Compound Exposures in Office Workers: A Controlled Exposure Study of Green and Conventional Office Environments, Environ. Health Perspect. 124 (2016) 805–812. [2] P. Carrer, P. Wargocki, A. Fanetti, W. Read More »

Scientific Basis for Safety and Security Goals

The need for safety comes right after basic physiological needs such as food, water, and air according to Maslow’s hierarchy of needs. When the body’s sense of security is threatened, a cascade of biological “flight or fight” responses are trigged, which fills the body with stress-induced hormones like adrenaline and cortisol. The stress response activates Read More »

Scientific Basis for Healthier Materials Goals

There are over 80,000 chemicals used in commerce in the United States, yet only about 300 have been evaluated for health concerns. Chemicals with concerning toxicological profiles are used in many building materials. These chemicals can migrate from building materials via volatilization, degradation as materials age, abrasion when users walk on or scratch materials, leaching, Read More »

Sensor Specifications

Selecting sensor packages 9F recommends that IEQ sensor packages selected for in-office use have technical specifications that are similar to or better than those outlined in Table 1, if possible. Table 1 includes two levels of accuracy that may be used to evaluate sensors. The Screening Level Accuracies are sufficient to distinguish between exposure threshold Read More »