The METROPAC FC40R1029 is a 20" x 30" return grill media air filter designed to improve indoor air quality in HVAC systems. This filter effectively captures dust, pollen, and other airborne contaminants, ensuring cleaner air circulation. Constructed from high-quality materials, it offers durability and efficiency. The filter is easy to install and replace, making maintenance hassle-free. Ideal for both residential and commercial applications, the FC40R1029 is crucial for maintaining optimal airflow and system performance, contributing to a healthier living and working environment.