**Reno AC: Cheap Units Fueling Summer Lung Mold?**

By Franklin Everett Shaw

December 24, 2025

The desert air in Reno offers a unique kind of dryness, one that can quickly turn a minor leak into a breeding ground for mold, especially when you’re relying on that window AC unit to beat the summer heat. Many residents, particularly those in older Victorian homes in neighborhoods like the historic Powning District, are unknowingly circulating mold spores along with their cooled air. It’s a silent health hazard, and ignoring it can have serious consequences.

Window AC units, especially the cheaper models, are notorious for trapping moisture. This creates the perfect environment for mold growth, particularly in a climate like Reno where drastic temperature swings between day and night cause condensation.

Let’s talk about the specific risks in Reno. Many older homes weren’t built with modern ventilation systems. This means moisture from showers, cooking, and even breathing gets trapped inside, exacerbating the problem. Add a window AC unit that’s not properly maintained, and you’ve got a recipe for disaster.

So, what kind of mold are we talking about? The most common culprits are Cladosporium, Aspergillus, and Penicillium. Cladosporium is often black or green and can trigger allergic reactions. Aspergillus, which comes in various colors, can cause more serious infections, especially in people with weakened immune systems. Penicillium, recognizable by its blue-green hue, is another common allergen.

How do you know if your AC unit is harboring these unwanted guests? Look for visible mold growth on the coils, vents, or even the surrounding wall. A musty odor emanating from the unit is another telltale sign. If you experience unexplained respiratory issues like coughing, wheezing, or a runny nose, mold could be the culprit.

Now, let’s get practical. Can you clean it yourself? In some cases, yes. If the mold growth is minor and contained to easily accessible areas, you can attempt a DIY cleaning.

Here’s a step-by-step guide:

1. Safety First: Wear gloves, a mask (N-95 or better), and eye protection. This is crucial to avoid inhaling or coming into contact with mold spores.
2. Unplug the Unit: Disconnect the AC unit from the power source to prevent electric shock.
3. Disassemble: Carefully remove the front panel and any other removable parts, following the manufacturer’s instructions.
4. Clean with a Mold-Killing Solution: Mix a solution of one part bleach to ten parts water. Alternatively, use a commercially available mold cleaner specifically designed for AC units.
5. Scrub and Rinse: Use a soft brush to scrub away the mold. Rinse thoroughly with clean water.
6. Dry Completely: This is the most important step. Mold thrives in damp environments. Use a clean cloth to dry all parts thoroughly. You can also use a fan to speed up the drying process.
7. Reassemble: Once everything is completely dry, reassemble the AC unit.
8. Test Run: Plug the unit back in and run it for a few minutes to ensure everything is working properly.

But here’s the catch: DIY cleaning isn’t always the answer. If the mold growth is extensive, if you’re sensitive to mold, or if you’re unsure about the proper cleaning procedures, it’s best to call a professional mold remediation company.

What are the pitfalls of DIY cleaning? The biggest mistake is not wearing proper protective gear. Inhaling mold spores can exacerbate respiratory problems and trigger allergic reactions. Another common mistake is not drying the unit completely, which can lead to even more mold growth. Finally, using harsh chemicals that can damage the AC unit or release harmful fumes is a risk.

When should you call a professional? If you see mold growing inside the walls surrounding the AC unit, it’s a sign of a larger problem that requires professional attention. If you experience persistent respiratory issues despite cleaning the unit, it’s also time to call in the experts.

Reno residents have several resources available to them. The Washoe County Health District offers information and resources on mold prevention and remediation. You can also find qualified mold remediation companies through the Better Business Bureau or online directories.

Don’t underestimate the impact of mold on your health. Prolonged exposure can lead to chronic respiratory problems, allergies, and even neurological issues. If you suspect mold is affecting your health, consult with a doctor.

Here’s a crucial point often overlooked: prevention is key. Regularly clean your AC unit, even if you don’t see visible mold. Ensure proper ventilation in your home by opening windows and using exhaust fans. Consider investing in a dehumidifier to reduce moisture levels.

Think of your window AC unit as a potential health hazard, not just a cooling device. Regular maintenance and vigilance are essential to protect yourself and your family from the dangers of mold exposure. Don’t let the dry desert air fool you; mold can thrive even in Reno.

Finally, remember that cheap AC units often lack the features and build quality to prevent mold growth. Investing in a higher-quality unit with features like antimicrobial filters and self-drying functions can be a worthwhile investment in your health. Consider it an investment in your well-being, especially if you live in an older Reno home.