Demiwise 20x120 in MERV 8 Vent Filter Roll – Cut-to-Fit, 80+ Filters, Adhesive Tape

Demiwise vent filter kit provides an affordable, simple way to add filtration to your room’s air supply. A single 20x120 inch roll can be cut to fit individual registers, letting you create a tailored filtration layer across rooms. Depending on cut size, you can produce 55+ standard filters (like 4x10 or 4x12) or 80+ smaller pieces, giving you flexible coverage for multiple vents.

Made from 100% non-woven polyester with an incremental density structure, the media captures over 85% of airborne particles as small as 2.0 microns. Its high-density electrostatic design helps attract and hold common indoor irritants—dust, mold spores, pet dander, pollen, and smoke particles—without creating a heavy airflow bottleneck.

At 0.5 inches thick, the filter layer balances filtration efficiency with steady air intake, so you can cover vents without noticeably restricting airflow in most settings. The kit is designed for versatility: it can be cut to fit floor, ceiling, wall, window, or HVAC vents and is supported by adhesive hooks and installation tape for a secure, tidy fit.

Key benefits and use cases

• Premium filtration: MERV 8 media made from 100% non-woven polyester captures particles down to 2 microns with an incremental density structure.
• High-capacity dust absorption: the media attracts and holds large allergens like mold spores, pet dander, pollen, as well as tiny particles such as dust and smoke.
• Optimal thickness: 0.5 inches thick delivers filtration without noticeably restricting airflow in most vents.
• Easy, versatile installation: 20x120 inch roll can be cut to fit various vents, with adhesive hooks and tape for secure mounting.
• Cost-effective and potential energy relevance: filtering at the vent can complement existing filtration and may support efficient system operation.

How to use

• Measure the vent opening and cut the media to size with scissors.
• Remove backing from the installation tape and place the filter onto the vent grille.
• Press edges to seal and use the included adhesive hooks as needed for a tidy fit.

What you get

One 20x120 inch filter roll with installation strip and adhesive hooks, plus installation tape. The roll yields 55+ standard filters or 80+ smaller pieces, depending on the cut size.