MERV = 'Minimum Efficiency Reporting Value' this is used to rate the overall effectiveness of an Air Filter. Below you will find a table that measures the MERV strength and tells you the Application of each unit's effectiveness. In general an Air Filter with a higher MERV Rating is more effective and has a broader application, but most residential homes will find the best use from an air filter between the 5-12 MERV rating.
|MERV RATING||MIN. PARTICLE SIZE||TYPICAL CONTROLLED CONTAMINANT||TYPICAL APPLICATIONS|
|1 - 4||> 10.0 Micrometers||Pollen, dust mites, cockroach debris, sanding dust, spray paint dust, textile fibers, carpet fibers||Residential window AC units|
|5 - 8||10.0 - 3.0 Micrometers||Mold, spores, dust mite debris, cat and dog dander, hair spray, fabric protector, dusting aids, pudding mix||Better residential, general commercial, industrial workspaces|
|9 - 12||3.0 - 1.0 Micrometers||Legionella, Humidifier dust, Lead dust, Milled flour, Auto emission particulates, Nebulizer droplets||Superior residential, better commercial, hospital laboratories|
|13 - 16||1.0 - 0.3 Micrometers||Bacteria, droplet nuclei (sneeze), cooking oil, most smoke and insecticide dust, most face powder, most paint pigments||Hospital & general surgery|
|17 - 20||< 0.3 Micrometers||Virus, carbon dust, sea salt, smoke||Electronics & pharmaceutical manufacturing cleanroom|
Average Customer Rating Based on 120 reviews:
Reviewer: Hilbert Riemer
We are very pleased. We had a difficult time locating a place that sells this 4.5 version!
Reviewer: Edward Croft
Live in an old farmhouse and we get a lot of dust in the house. The filter works well
Merv 12 filter - 12/20/2016
Reviewer: Christopher Moyer
Love em, easy to install and long lasting. Do not negatively impact air flow
Reviewer: Joe Painter
Helps keep the dust down.
Quality Air Filters - 12/14/2016
Reviewer: Bill Scholp
I bought these air filters for my home furnace. They fit properly and appear to be good quality. They are not overly expensive. Watch for the free shipping specials. I will continue to purchase these as long as needed.
Great Value - 12/13/2016
Reviewer: Jennifer Henderson
Have purchased these filters for years and find that buying in bulk saves me money and having purchased them this time with the discount,and the great personal telephone assistance, I got what I wanted - more filters at a lower price!
Reviewer: John Berka
Works very well
Timely Delivery and Excellent Product. - 12/12/2016
Reviewer: Arun Desai
I have allergies. This MERV 12 rated OEM filter is excellent to provide relief to me. There is considerable reduction in dust particulate in my home.
Review filter - 11/24/2016
Reviewer: Christopher Moyer
Still looks clean after 6 mos and not obvious degradation to air flow throughout house
Furnace air filter - 11/08/2016
Reviewer: William Skeddle
Performs well removing dust and airborne particles. Great product. I recommend this filter.