Sealed Windows
To conserve heat, windows remain closed throughout winter, preventing fresh air from entering and allowing pollutants to accumulate indoors. This creates a stagnant environment where contaminants build up over time.
Low Humidity
Cold air holds less moisture, and heating systems further reduce humidity levels. Dry air can cause respiratory discomfort and allows particles to remain suspended longer, affecting air quality.
Indoor Pollutants
Without proper ventilation, common household pollutants from cleaning products, cooking, and materials accumulate. These include volatile organic compounds and particulate matter that affect air quality.