What is meant by 'Low-Emitting Materials' in IEQ?

• A. Materials with low emissions of VOCs and other pollutants
• B. Materials with high thermal mass
• C. Materials that are weatherproof
• D. Materials with high emissions of ozone

Answer: (A)

Low-Emitting Materials are about indoor air quality. They consist of building products and furnishings that release only small amounts of volatile organic compounds (VOCs) and other pollutants into the indoor environment. Reducing these emissions helps prevent odors, irritation, and long-term health risks for occupants, which is why this concept is emphasized in IEQ credits. Materials like paints, adhesives, sealants, flooring, finishes, and composite wood products are common sources of VOCs, so selecting products with low emissions—often verified by third-party certifications—supports a healthier indoor environment.

The other options don’t fit this idea. High thermal mass relates to a material’s ability to store heat and influence energy performance, not indoor air quality. Weatherproofing concerns exterior durability and protection from weather, not emissions inside. High ozone emissions would worsen air quality, which is the opposite of what low-emitting materials aim to achieve.