The Effect of Indoor Air Pollution on Our Brain Function

HomeSense Team

November 9, 2015

Indoor Air Quality and Cognitive Function

A study conducted by scientists from the Harvard School of Public Health, SUNY-Upstate Medical School and Syracuse University, published in the Environmental Health Perspectives journal, found that indoor air quality can affect cognitive function.

The study found that normal indoor levels of carbon dioxide and volatile organic compounds can negatively impact cognitive function and decision-making. These chemicals are found in common materials like plastics, newspapers, ceiling tiles, and vinyl floors.

While the study focused on office buildings, similar air quality issues can affect homes. During winter months, we spend even more time indoors.

The Study

Researchers followed 24 people for six days during their normal eight-hour workday. On alternating days, the participants were exposed to three different office environments:

Conventional conditions, which included high concentrations of volatile organic compounds
Green conditions, with low VOC concentration
Green+ conditions, with high levels of outdoor ventilation

At the end of each workday, the participants were given a cognitive assessment test, which measured nine functional areas, including basic, applied and focused activity levels; task orientation; crisis response; information seeking; information usage; breadth of approach; and strategy.

The results showed cognitive test scores were 61 percent higher in low VOC concentration environments and 101 percent higher in high-ventilation environments.

What This Means for Your Home

The EPA estimates that indoor air—in offices and homes—can be 2 to 5 times more polluted than outside air. This research underscores the importance of clean indoor air, especially during winter months when outdoor ventilation is limited.

Here are some air purification options to consider for your home:

High-Efficiency Air Purifiers

High-efficiency air purification systems can capture and inactivate germs and particles floating around your house—even ones as small as .30-1.0 microns in size. Look for systems with:

High MERV (Minimum Efficiency Reporting Value) ratings (15 or higher)
Technology that both captures and neutralizes pathogens
Proven effectiveness against common airborne viruses and bacteria

Performance Air Purifiers

Mid-range air purifiers with built-in pathogen reduction technology help reduce germs, allergens, and other airborne pollutants. These systems typically feature:

MERV 13 filters
Capture and kill technology
Effectiveness against common pathogens including flu and cold viruses

Media Filter Systems

Media filter systems use easy-to-replace filters that increase the available surface area for filtration, reducing allergens in your breathing air. Features include:

MERV 9 or higher filtration
Long-lasting filters (up to 12 months)
Significantly more effective than standard 1-inch filters

If you’d like help choosing an air purifier for your home or have questions about indoor air quality, give us a call at 317-203-8149.

Posted in: HVAC Indianapolis, Indoor Air Quality

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