Interpreting the Data

After collecting indoor air quality (IAQ) data using sensors, the next crucial step is interpreting the results to understand the state of your indoor environment and identify potential issues.

Comparing with Guidelines and Standards

The first step in data interpretation is to compare your sensor readings with established guidelines and standards for IAQ. The World Health Organization (WHO) has published air quality guidelines that provide recommended limits for various pollutants, including PM2.5, NO2, and others. You can find these guidelines on the "WHO Air Quality Guidelines" page of this wiki.

Understanding Measurement Units

IAQ parameters are measured in different units, and it's important to understand what these units represent:

Micrograms per cubic meter (µg/m3): This is the standard unit for measuring the concentration of particulate matter (PM) in the air.

Parts per million (ppm): This unit is often used for measuring the concentration of gases like carbon dioxide (CO2).

Parts per billion (ppb): This unit is used for measuring very low concentrations of pollutants, such as volatile organic compounds (VOCs).

Interpreting IAQ Data

Here's how to interpret your IAQ data based on common parameters:

Carbon Dioxide (CO2):

Ideal Range: Below 1000 ppm.
High Levels: Indicate poor ventilation and potential buildup of other pollutants.

Volatile Organic Compounds (VOCs):

High Levels: May indicate the presence of sources like paints, cleaning products, or new furniture. Refer to the "Source Control" page for mitigation strategies.

Particulate Matter (PM2.5):

WHO Guideline: Annual average exposure should not exceed 5 µg/m3.
High Levels: Can cause respiratory and cardiovascular problems. Consider using air purifiers or improving ventilation.

Temperature and Humidity:

Ideal Range: 20-25°C and 30-60% relative humidity.
High Temperature: Can cause discomfort and increase the release of VOCs from building materials.
Low Temperature: Can lead to condensation and mold growth.
High Humidity: Promotes mold growth and dust mite proliferation.
Low Humidity: Can cause dry skin and respiratory irritation.

EDIAQI Resources

The EDIAQI project provides several resources to help you understand and improve IAQ:

EDIAQI IAQ Simulator: This tool can help you predict indoor air pollution levels based on your specific location and building characteristics.
The EDIAQI Decision Tree: This interactive tool guides you through identifying and addressing IAQ issues.

By utilizing these resources and taking proactive measures, you can create a healthier and more comfortable indoor environment for yourself and others.