Mould in air conditioning units can be tricky to detect initially, but there are several telltale signs that can help you identify it:

1. Musty odour: One of the most common signs of mould is a persistent, musty smell when your air conditioner is running. This odour can spread throughout the space as the unit circulates air.
2. Visible growth: Check the vents, air ducts, drip pans, and coils for black, green, or white spots or patches. Mould can appear in various colours and textures and often grows in damp, dark areas inside the unit.
3. Allergy symptoms: If you or others in the space experience unexplained allergy symptoms—such as sneezing, coughing, itchy eyes, or respiratory discomfort—mould in the air conditioning system could be the culprit.
4. Reduced efficiency: Mould can clog parts of the air conditioning system, causing it to work harder and reducing its efficiency. If you notice a decrease in cooling performance or higher energy bills, mould might be a factor.
5. Condensation or water leaks: Excess moisture is a breeding ground for mould. If you see signs of condensation or water pooling inside or around the unit, it’s a red flag to check for mould growth.
6. Dust or black particles around vents: Mould spores can sometimes resemble dust or black particles around the air vents. If you clean the area but notice it reappearing, it could be mould.

Read more about it: Is Your Air Conditioner Harbouring Mould? Here's How to Find Out

Preventing mould from returning after remediation requires a combination of proper cleaning, regular maintenance, and proactive measures to control moisture and humidity. Here are some effective steps to ensure your space remains mould-free:

1. Eliminate excess moisture: Mould thrives in damp environments, so it’s crucial to control moisture levels. Use a dehumidifier in high-humidity areas, ensure proper ventilation in bathrooms and kitchens, and repair any leaks or water damage promptly.
2. Improve air circulation: Good airflow reduces moisture buildup, making it harder for mould to grow. Open windows, use fans, and ensure your air conditioning system is properly maintained to keep air moving.
3. Regular maintenance of air conditioning units: Clean and inspect your air conditioning system regularly to prevent moisture and dust buildup. After cleaning your air conditioning units, use SAN-AIR™ Air Conditioning & Air Handler Gel Diffusers to prevent mould growth. These gels work continuously to kill airborne mould spores and bacteria while improving air quality.
4. Monitor humidity levels: Keep indoor humidity below 60% to discourage mould growth. A hygrometer can help you monitor and adjust humidity levels as needed.
5. Clean regularly: Regularly clean surfaces, especially in damp areas like bathrooms, kitchens, and basements. Use natural mould cleaners to avoid harsh chemicals and ensure long-term safety.
6. Check for early signs of growth: Periodically inspect areas prone to mould, such as corners, ceilings, and air conditioning ducts. Address any signs of mould growth immediately to prevent it from spreading.
7. Fix structural issues: Ensure proper insulation, fix roof leaks, and address any structural problems that could allow water intrusion or poor drainage.

Using a proactive product like SAN-AIR™ Gel Diffusers after cleaning ensures that your indoor air remains fresh and mould-free. These gels not only sanitise your air conditioning system but also provide a long-lasting barrier against airborne bacteria and mould spores, making them an essential tool for ongoing mould prevention.