Why is it critical to ensure proper ventilation in energy-efficient homes?

Ensuring proper ventilation in energy-efficient homes is critical primarily for moisture control and maintaining good indoor air quality. In such homes, the building envelope is often tightly sealed to enhance energy efficiency, which can inadvertently trap moisture and pollutants. Without adequate ventilation, humidity levels can rise, leading to condensation, mold growth, and deterioration of building materials. Additionally, the indoor air may become stale due to a lack of fresh air circulation, potentially leading to health issues for the occupants from pollutants like volatile organic compounds (VOCs) and particulate matter.

By prioritizing proper ventilation, these issues can be effectively managed, allowing for a healthier and more comfortable living environment. This approach ensures that humidity is kept at safe levels and that fresh air is continuously exchanged with indoor air, thus enhancing overall air quality and occupant health.