Doctor reveals why air conditioning is waking you up at 3 a.m. and how to fix it from tonight

Key Points:

• Air conditioners can negatively impact sleep by reducing indoor air quality, especially when filters are neglected, leading to the circulation of dust, mold, and allergens that cause airway irritation and frequent nighttime awakenings.
• Proper maintenance of AC filters, including replacing them every three months as recommended by the CDC, is crucial to prevent indoor air pollution and respiratory issues that disrupt sleep.
• Other common indoor pollutants affecting sleep include gas stoves, candles, air fresheners, cleaning products with volatile organic compounds (VOCs), and wood-burning fireplaces, all of which can increase inflammation and disturb the body's sleep-wake cycle.
• To improve sleep quality and indoor air, experts recommend three simple steps: regularly check and replace AC filters, increase home ventilation by using exhaust fans and opening windows when outdoor air quality is good, and reduce the use of products with high VOCs or strong fragrances.
• Using portable air purifiers with HEPA filters alongside well-maintained HVAC systems can further help capture airborne pollutants, but windows should remain closed during their operation to maximize effectiveness.