Another 14 month gap between filter changes & once again a light vacuuming instead of a complete rebuild. The dust is definitely building up on the inlets since those require a rebuild.

Added more foam bits to space the inlet. The light vacuuming process takes 1 hour, compared to many hours for a complete rebuild.

The filter change made a meaningful difference in air flow, this year.  

Weather stripping installed in 2025 concentrated more of the airflow in the inlets.  Those had a lot more dust than 2025.