22x22x1 MERV 8 Performance During High Pollen Days
We’ve tested 22x22x1 MERV 8 filters through some of the worst pollen months on record, and the finding holds across every household we’ve looked at. A filter performing at 70% efficiency on day one rarely delivers that same result by week six of spring. The MERV rating is a clean-filter, lab-condition number. Real pollen season … Read more