Should heated shelters be airtight

Heated shelters do not necessarily need to be airtight; in fact, some ventilation is important to prevent the buildup of moisture and ensure fresh air circulation. An airtight shelter can trap humidity and lead to condensation, which can create a damp environment detrimental to health. However, it should be well-insulated to retain heat while allowing for some airflow. Balancing insulation and ventilation is key for comfort and safety.