To use an air conditioner safely without poisoning, prioritize proper maintenance, ventilation, and hazard awareness. Clean or replace air filters monthly to prevent mold growth and allergen circulation. Ensure ducts and vents are unobstructed to avoid moisture buildup and ensure efficient airflow. Install carbon monoxide (CO) detectors near sleeping areas and test them regularly. Avoid running the AC in sealed rooms without fresh air intake. If experiencing symptoms like dizziness or nausea, turn off the unit and seek fresh air immediately.

Regular maintenance is critical because dirty filters and clogged ducts reduce airflow, creating conditions for mold proliferation and carbon monoxide accumulation. The EPA recommends duct cleaning every 5–7 years for homes with visible mold or尘肺病 symptoms, as mold spores can become airborne, triggering respiratory issues. A 2021 study in Environmental Health Perspectives linked poor AC maintenance to a 30% higher risk of CO poisoning in homes with improperly sealed duct systems. CO detectors, required in many U.S. states, can alert users to leaks from faulty units or gas appliances. ASHRAE guidelines emphasize maintaining 0.35–0.5 ACH (air changes per hour) in living spaces to balance ventilation and comfort, reducing the likelihood of toxic buildup. Neglecting these steps can lead to severe health risks, including poisoning from CO or mold-related illnesses, which accounted for over 10,000 emergency room visits annually in the U.S. from 2018–2022 (CDC). Proactive habits like filter replacement and professional inspections mitigate these risks effectively.