👉 Built fumes refer to the harmful vapors or gases that can accumulate inside enclosed spaces, such as homes, offices, or industrial areas, due to the incomplete combustion of materials like fuels, chemicals, or organic matter. These fumes often contain a mixture of volatile organic compounds (VOCs), particulate matter, and other toxic substances that can pose significant health risks over time, including respiratory issues, headaches, and long-term damage to organs. Sources of built fumes include cooking oils, cleaning agents, paints, and even some building materials and furnishings. Proper ventilation and regular maintenance are crucial to mitigate these risks and ensure a safe indoor environment.