**Houston Sleep: AC Lies About Lung Enzymes?**

By Franklin Everett Shaw

January 20, 2026

The blast of cool air hits you the moment you step inside, a welcome relief from Houston’s oppressive summer heat. But could this everyday comfort be silently impacting your health? The question of whether air conditioning, a staple in Houston homes and businesses, might negatively affect lung enzyme production and function is more complex than you might think. Let’s dive into the science, separate fact from fiction, and explore practical ways to breathe easier in the Bayou City.

The core concern revolves around the potential for mold growth within AC systems. Houston’s humidity creates a perfect breeding ground for these microscopic organisms. Mold spores, when inhaled, can trigger a cascade of respiratory issues.

• Allergic reactions are common, manifesting as coughing, wheezing, and shortness of breath.
• In susceptible individuals, mold exposure can exacerbate asthma or even lead to more serious conditions like hypersensitivity pneumonitis.

But what about lung enzymes specifically? While direct evidence linking AC use to decreased lung enzyme production is limited, the inflammatory response triggered by mold exposure can certainly impact lung function.

• Lung enzymes, like alpha-1 antitrypsin, play a crucial role in protecting lung tissue from damage.
• Chronic inflammation can overwhelm these protective mechanisms, potentially leading to impaired lung function over time.

Consider the case of a 45-year-old woman in Bellaire, TX, who experienced persistent coughing and fatigue. After months of doctor visits, an allergist discovered a significant mold infestation in her home’s AC system. Remediation of the mold and improved air filtration led to a dramatic improvement in her respiratory health. This highlights the importance of addressing the root cause: mold.

So, how can Houston residents mitigate these risks? The key lies in proactive AC maintenance and air purification.

1. Regular AC Servicing: Schedule professional AC maintenance at least twice a year. Technicians can clean coils, check for leaks, and identify potential mold growth.
2. Filter Replacement: Change your AC filters every 1-3 months, depending on the filter type and air quality. Use high-efficiency particulate air (HEPA) filters to capture smaller particles, including mold spores.
3. Duct Cleaning: Consider duct cleaning every few years to remove accumulated dust and debris that can harbor mold.
4. Humidity Control: Maintain indoor humidity levels below 60% to discourage mold growth. Use a dehumidifier if necessary, especially during humid months.
5. UV Lights: Install UV lights in your AC system to kill mold and bacteria. These lights can be particularly effective in preventing mold growth on cooling coils.
6. Air Purifiers: Invest in a high-quality air purifier with a HEPA filter and activated carbon filter. Place it in your bedroom or living room to remove airborne pollutants and allergens.

A common mistake is neglecting the drain pan. This area can become a breeding ground for mold and algae. Regularly clean the drain pan with a bleach solution to prevent buildup.

Another pitfall is using the wrong type of AC filter. Cheap fiberglass filters are ineffective at capturing small particles. Invest in pleated filters with a MERV rating of at least 11 for better filtration.

Let’s talk about specific products. For air purifiers, consider brands like Blueair or Dyson, which offer models with HEPA and activated carbon filters. For UV lights, consult with a qualified HVAC technician to determine the best option for your AC system.

Beyond AC maintenance, consider these additional strategies:

• Monitor Indoor Air Quality: Use an indoor air quality monitor to track temperature, humidity, and particulate matter levels. This can help you identify potential problems early on.
• Ventilate Your Home: Open windows and doors regularly to improve ventilation and reduce indoor air pollution.
• Avoid Smoking Indoors: Smoking introduces harmful chemicals into the air that can further irritate your lungs.
• Address Water Leaks Promptly: Repair any water leaks in your home immediately to prevent mold growth.

The reality is that living in Houston without air conditioning is simply not feasible for most people. However, by taking proactive steps to maintain your AC system and improve indoor air quality, you can minimize the potential risks to your respiratory health. Don’t let fear dictate your comfort. Instead, empower yourself with knowledge and take control of your indoor environment.