Evaluating sources of indoor air pollution

Area of Science:

• Environmental Science
• Chemical Engineering
• Building Science

Background:

• Indoor air pollution (IAP) assessment necessitates understanding pollutant sources, indoor air movement, and outdoor air exchange dynamics.
• Existing methods for evaluating IAP often lack a comprehensive approach integrating these critical factors.

Purpose of the Study:

• To develop and validate a multi-phase research program for evaluating indoor air pollution problems.
• To investigate the relationship between indoor pollutant sources, air movement, and outdoor air exchange rates.

Main Methods:

• Phase 1: Utilized environmental chambers to determine emission factors for specific indoor pollutants.
• Phase 2: Developed an Indoor Air Quality (IAQ) model to predict pollutant concentrations based on emission data and air exchange rates.
• Phase 3: Employed an IAQ test house for experimental validation of the IAQ model predictions.

Main Results:

• Emission factors for para-dichlorobenzene from moth repellants and particles from kerosene heaters were quantified.
• IAQ model predictions demonstrated good agreement with experimental measurements in the IAQ test house.
• The study successfully evaluated specific indoor pollutant sources using the integrated three-phase approach.

Conclusions:

• The coordinated three-phase research program provides a robust framework for evaluating indoor air pollution sources.
• Accurate input parameters for source emissions, air exchange, air movement, and deposition are crucial for reliable IAQ model performance.
• This methodology enhances the scientific basis for addressing indoor air quality challenges.