MERV 13 is the residential allergen-and-virus tier — finer pleats than the standard MERV 8 furnace filter, with electrostatic media that traps particles down to 0.3 microns (smoke, bacteria, pollen, mold spores). The 14x20x1 size fits standard return-air grilles in many older HVAC systems and some vent registers.
Households with allergy sufferers, kids with asthma, or anyone in a wildfire-smoke region tend to upgrade to MERV 13 — the difference shows up within a week as less dust on shelves and fewer allergy symptoms. Six-pack handles a full year of quarterly changes.
BNX manufactures TruFilter in the United States with electrostatic pleated media for residential HVAC use.
