The blower wheel is the cylindrical fan inside your Wall Mount unit that physically moves the air. It is designed with specialized blades to provide high CFM while remaining virtually silent. Over time, dust can accumulate on the wheel, causing it to become unbalanced or noisy. If your unit starts to vibrate or loses airflow, a dirty blower wheel is often the cause. We recommend a professional Annual Inspection to keep this component clean. If the wheel becomes damaged, we stock Replacement Blower Wheels for various models. A clean wheel ensures that your Heat Pump System operates at peak efficiency. It is the "lungs" of your indoor climate control.