Making a house tighter may result in a health hazard due to what reason?

Making a house tighter can significantly impact its indoor air quality, and inadequate ventilation is the primary concern in this scenario. When a building is sealed too tightly to improve energy efficiency, there can be insufficient airflow to bring in fresh air and adequately remove stale air. This lack of ventilation can lead to a buildup of indoor pollutants, including carbon dioxide, volatile organic compounds (VOCs), and other harmful substances released from building materials and household products.

Inadequate ventilation can also affect humidity levels, contribute to mold growth, and diminish overall occupant comfort. While excess humidity, increased radon levels, and condensation issues can all be consequences of improper building practices or environmental factors, they stem from inadequate ventilation in a tightly sealed building. Thus, addressing ventilation is essential for maintaining a healthy indoor environment in a tightly constructed home.