4 Ways to Refresh Stale Indoor Airleaves in fall and the brisk air in winter. Come spring and summer, though, it’s another matter entirely. Poor indoor air quality during this time of year can feel either humid and stuffy, or terribly stale. A lot of people will crack open a window to try to fix the situation. But there’s a much better (and more efficient!) way to address your stale air problems.Why Does the Air Feel Stale?Stale air is created in a number of different ways. Some of the most common causes are from lack of ventilation and various contaminants. The odors and allergens from commercial cleaning products and dust mites are a big no-no for fresh indoor air. But without a good filtration system in place, it’s hard to keep these issues at bay. They just keep adding up to create that lingering stale air vibe.Another reason your air can feel stale is because of improper humidity levels. Over time, poor circulation can make your indoor air feel even more stuffy. You need to introd...