NKS Heating & Cooling - Mount Prospect's Best HVAC Repair

We recommend checking your air filter every month and replacing it at least every 90 days. However, if you have pets, allergies, or during high-use seasons, you may need to change it as often as every 30-45 days. A clean filter is crucial for maintaining proper airflow, system efficiency, and good indoor air quality in our local climate.

Common signs include excessive dust on surfaces soon after cleaning, lingering musty odors, increased allergy symptoms or respiratory irritation among household members, and visible mold growth around vents. If you notice these issues, it's a good idea to have your system inspected. We can check for duct contamination, assess your filtration, and recommend solutions like air purifiers or UV lights.

Absolutely. A professional maintenance visit includes cleaning critical components, checking for airflow restrictions, and ensuring your system is operating correctly. This not only prevents minor issues from becoming major repairs but also directly tackles the root causes of poor air quality, like dirty coils and clogged drain lines. Regular service keeps your system clean and efficient, protecting your family's health and comfort.