During the AC check on the Bryant heat pump, I noted the installed filter was a non-genuine "213 knock off." This aftermarket filter may not meet the original equipment manufacturer's specifications for airflow and filtration efficiency, potentially impacting system performance and longevity. A genuine Bryant filter, designed for optimal compatibility, is recommended to ensure proper air filtration, maintain system efficiency, and protect internal components from dust and debris buildup. Replacing the non-OEM filter is advisable for optimal system operation.