The Laars Heating Systems A2121700 Air Filter Inlet (14" x 14") is a high-quality filtration component designed to maintain clean airflow in Laars boilers and heating systems. It effectively captures dust, debris, and airborne particles, protecting internal components from contamination and improving system efficiency. https://www.partshnc.com/a2121700-laars-heating-systems-filter-air-inlet-14x14