Houston Asthma: Cheap AC Inflaming Kid's Lungs?

By Franklin Everett Shaw

January 8, 2026

The air in your Houston home feels heavy, thick, and just wrong. You’ve dusted, you’ve vacuumed, but that persistent stuffiness lingers, especially when the AC kicks on. Could the culprit be lurking inside your window AC unit, breeding mold and allergens that are triggering your child’s asthma? It’s a grim thought, but a very real possibility, especially in our humid climate.

Window AC units, common in many older Houston homes, are notorious for trapping moisture and dust. This creates a perfect breeding ground for mold and allergens, which then get circulated throughout the room every time you turn on the AC.

Let’s get practical. First, safety first. Always disconnect the AC unit from the power outlet before you begin any cleaning.

Next, inspect the unit. Carefully remove the front panel and the filter. Use a flashlight to examine the cooling coils, the fan blades, and the interior surfaces. Look for dark spots, discoloration, or a musty odor. These are telltale signs of mold.

Now, the DIY cleaning process. For light mold buildup, a simple solution of equal parts white vinegar and water can work wonders. Put the solution in a spray bottle. Spray the affected areas thoroughly, let it sit for about 15 minutes, and then scrub gently with a soft brush.

Don’t forget the drain. Window AC units have a small drain hole to release condensation. This can get clogged with debris, leading to water buildup and, you guessed it, more mold. Use a pipe cleaner or a small wire to clear the drain.

Filter replacement is crucial. The filter is your first line of defense against dust and allergens. Replace it regularly, at least every month during peak AC season (which, let’s face it, is most of the year in Houston).

Where to find affordable filters? Check out your local hardware stores like Home Depot or Lowe’s. Also, consider online retailers like Amazon or Walmart for bulk purchases. Look for filters specifically designed to trap allergens, such as HEPA filters.

But what if the mold infestation is severe? If you see extensive mold growth, or if the DIY cleaning doesn’t seem to be doing the trick, it’s time to call in a professional. Mold remediation companies in Houston can safely and effectively remove mold from your AC unit and prevent it from returning.

Common mistakes to avoid:

• Using bleach. Bleach can damage the AC unit’s components and is not as effective at killing mold as vinegar.
• Not letting the unit dry completely. Moisture is mold’s best friend. Make sure all parts of the AC unit are completely dry before reassembling it.
• Ignoring the drain. A clogged drain is a recipe for disaster.
• Using harsh chemicals. Stick to gentle, non-toxic cleaning solutions.

Beyond cleaning: Prevention is key. To prevent mold and allergen buildup in the first place, run your AC unit on “fan only” mode for a few minutes after each use to dry out the interior. Also, consider using a dehumidifier in the room to reduce moisture levels.

Let’s talk about local resources. Houston offers several community health clinics that provide free asthma screenings and educational programs on proper AC maintenance. Check out the City of Houston Health Department website for a list of clinics in your area. Many offer resources specifically for low-income families.

For example, the Harris County Public Health department often hosts workshops on indoor air quality and asthma management. These workshops are a great way to learn more about how to create a healthy home environment for your child.

Another valuable resource is the American Lung Association. They offer online resources and support groups for families affected by asthma.

Real-world scenario: Maria, a single mother living in the Gulfton area of Houston, noticed her son’s asthma symptoms were getting worse. She suspected the window AC unit in their apartment was to blame. Following the steps outlined above, she cleaned the unit and replaced the filter. She also contacted the Harris County Public Health department and enrolled in their asthma management program. Within a few weeks, her son’s symptoms improved significantly.

Specific challenges in Houston: The high humidity in Houston makes it particularly challenging to prevent mold growth. Regular cleaning and maintenance are essential. Also, older homes in Houston often have poor ventilation, which can exacerbate the problem.

Actionable insights:

• Create a cleaning schedule. Set a reminder to clean your AC unit at least once a month.
• Invest in a good quality filter. Don’t skimp on the filter. A good filter can make a big difference.
• Monitor your child’s asthma symptoms. If you notice their symptoms are getting worse, take action immediately.
• Take advantage of local resources. Houston has a wealth of resources available to help families manage asthma.

Don’t let mold and allergens take over your home and compromise your child’s health. By following these simple steps, you can create a cleaner, healthier environment for your family. Remember, a little effort goes a long way in protecting your child’s respiratory health.