Biodefensor 20"x90" Air Vent Filters, Made in USA, MERV 6 High-Airflow, Cut to Size Material for Home Floor, Grilles, Ceiling, Wall HVAC Furnace Vents, Includes Adhesive Hook Tape, Prep Pad

I was paying about $150 for my HVAC guy to sell me this pre cut. The value for this is amazing. Air flow works like a charm through my HVAC system. The filter fits easily with a pair of normal scissors. Zero complaints on this and will be repeatedly purchasing. Even though this says it can be replaced every 3 months, I still replace it monthly.

This Biodefensor air vent filter is designed with great intelligence and with precise attention to detail. The materials used are of very high quality and contain no strange smells. All items in the package arrived 100% brand new. If you want to breathe clean air, then look no further because this air vent filter does an incredibly amazing job since it traps pollutants on a multi level basis as is stated in the description. I noticed a notable positive difference in the air quality shortly after installation. It is also so easy to install. As per the instructions, it should be replaced around every three months for optimal air quality which is very well worth it. The Biodefensor company's customer service staff is fantastic in answering any questions you may have about their products. They are responsive, smart, respectful and extremely kind. I highly recommend this air vent filter to others due to its many benefits. Just buy it and see for yourself.

Not sure how it's possible that this has such a high rating. But it's okay for a basic standard filter. It does the job

These filters are an amazing assest to us. We use them as an intake coolant air filter to our furnace that faces our back door. This door is where our dogs go in and out and most of the daily traffic occurs. These filters have cuts down on the dust, hair, pollen, and allergens in our house so tremendously that all of our indoor allergies have settled down and we can live allergy free inside. Installation is a breeze, thickness is just right and it does not affect the air flow to our furnace. In fact it has helped it by keeping our actual furnace filters cleaner. Highly recommend these filters.

Well packaged and is as advertised. One of the only merv6 filters I could find. Impedes a little airflow as expected but does a great job at filtering.

I live in an old house that probably needs an air system flush, but this was a great and cost effective fix for the moment. All our vents are different sizes, so this was a great purchase to be able to cover all the vents. It still allows air through but it seems to have kept some of the dust out because it has helped with some of our allergy issues. It does arrive flat and not rolled up.

Works perfect for the RV AC to help keep the dust out and air clean.

very good, have not had it long enough to tell if the filtering is better in reducing dust & dog hair