BNX TruFilter 18x18x1 MERV 12 Activated-Carbon Air Filter (4-Pack) is a 4-pack of 18x18x1 pleated HVAC filters with MERV 12 rating and activated carbon for odor adsorption with electrostatically charged pleated media that captures odor, mold, bacteria, smoke, and fine dust. Rating: MERV 12 with activated carbon for odor adsorption. The pleated geometry increases surface area inside the same 18x18x1 frame, which lets the filter hold more particulate before pressure drop forces a change-out — typical change-out interval is 60–90 days for a single-pet household and shorter under heavy allergy season or smoke conditions.
Drops directly into any 18x18x1-rated AC, furnace, or HVAC return — bedroom intake, hall intake, or in-line plenum filter slot. The 4-pack covers about six months on a 60-day change cycle (single intake). Stamp the install date on the cardboard frame so you have a visual reminder when you walk past the return.
BNX TruFilter is a US-based HVAC filter brand making pleated electrostatic AC, furnace, and HVAC filters in MERV 8, 10, 11, 12 (with activated carbon), and 13 ratings across the common residential sizes. Made in the USA. The brand line covers single-pack and multi-pack configurations so you can stock a year of filters at a time without paying single-pack pricing.
