Find the best air filter for your home we test evaluate and compare the latest air filters.
Furnace air filter comparison.
The american society of heating refrigerating and air conditioning developed this rating as a way of identifying a filter s ability to trap air pollutants and particles.
The other two systems were created by 3m mpr and the home depot fpr to differentiate their offerings.
Filtrete mpr 300 20x25x1 furnace filter.
Furnace filters are replaced by measuring the width by the length.
The first product that i added to the review list was filtrete mpr 300.
Merv 8 pleated ac furnace air filter.
The higher the number the better the furnace filter is in capturing particles.
Compared with the cheapest basic filters available medium efficiency merv filters like the nordic pure merv 12 can greatly reduce airborne dust mold spores pollen and even smoke and doing that.
Mpr measures ratings based on sizes 0 3 to 1 microns.
Merv has a scale of 1 to 20 with 20 as the best.
Compared to the home depot s method of ranking air filters fpr merv has wider range.
So a filter that measure 20 inches long by 25 inches wide would be replaced by a 20 x 25 filter.
Using an air filter with a merv rating higher than what your furnace or air conditioner manufacturer recommends can actually impair its performance.
If you re getting low airflow check the air filter a clogged filter can cut airflow to a trickle.
Again there s no direct comparison with the merv rating.
Depth can also be important on some furnaces with most being roughly 1 inch deep.
Aprilaire 213 merv.
The merv filter rating is the domestic and international industry standard rating system established by the american society of heating refrigerating and air conditioning engineers.
Top 15 best furnace filters reviews 2020 1.
Filtrete mpr 1000 16x20x1 ac furnace filter is also one of the great.
While fpr s rating system goes from 1 to 10 merv s rating system goes from 1 to 20.
Filtrete mpr 1000 16x20x1 ac furnace filter.
The vast majority of disposable furnace filters are rated according to the merv scale minimum efficiency reporting value created by the american society of heating refrigerating and air conditioning engineers.
Fpr ratings are on a scale from 4 through 10.
Fpr 10 is similar in strength to merv 20 since they are both the highest rating value.