Standards Development for Gas Phase Air Cleaning Equipment in Buildings.
Standards Development for Gas Phase Air Cleaning
Equipment in Buildings.
Persily, A. K.; Howard-Reed, C.; Watson, S.; Martys, N.
S.; Garboczi, E. J.; Davis, H.
NISTIR 7525; 29 p. October 2008.
Sponsor:Department of Homeland Security, Washington, DC
air cleaning systems; vapor phases; standards;
filtration; effectiveness; experiments; filters;
contamination; scale models; ventilation; air quality
Concerns about building security have resulted in
increasing interest in gas phase air cleaning (GPAC) and
the need for standard methods to determine the
effectiveness of these systems. Similarly, the ability
to predict their installed performance, based on such
standard test data, is becoming increasingly important.
The development and application of these standards and
prediction tools will provide better protection of
building occupants against chemical agents and improve
the ability of designers and building owners to identify
and specify air-cleaning equipment with a realistic
expectation as to installed performance. The National
Institute of Standards and Technology (NIST) has
conducted an effort to facilitate the development of
these standards and predictive tools under a project
funded by the Department of Homeland Security. This
report describes the following tasks that were carried
out as part of this project: an evaluation of gas phase
air cleaning technology; an assessment of existing and
proposed standards, as well as relevant guidance
documents; design of a laboratory-scale microreactor to
evaluate media consistent with current and proposed
industry approaches; micro-scale modeling to understand
the interactions between the media and gaseous
contaminants and, building-scale modeling to understand
the impacts of air cleaning systems in controlling