What Causes Stale Air?

Stale air is indoor air that hasn’t had enough fresh air circulating through it. Most people notice stale air because the pent up pollutants have an unpleasant smell or make a room feel stuffy. At low levels, stale air is uncomfortable, but at higher levels, stale air can become unhealthy.

Breathing in unhealthy levels of stale air can cause skin irritation, headaches, and fatigue, and can be especially dangerous for individuals with underlying conditions like allergies or respiratory problems.