Timing Your Filter Changes with Pollen Waves
Most homeowners change air filters on arbitrary calendar dates. A far more effective strategy is timing filter replacements to precede regional botanical pollen explosions.
- Early Spring (March): Install a fresh MERV 11 or 13 filter before tree pollen (oak, birch, cedar) peaks.
- Late Summer (August): Replace the filter right before ragweed and weed pollens surge.
- Late Fall (November): Put in a clean filter for heating season to capture indoor dust and winter furnace soot.
About ClariSelect Editorial & Research Standards:
Sizing measurements, static pressure curves, and filtration ratings referenced across our educational guides are compiled from published ANSI/ASHRAE Standard 52.2 engineering data, AHAM AC-1 verified ratings, and manufacturer technical documentation. ClariSelect provides objective editorial research and analysis with zero sponsored placements.