The lowest 300 mpr is a basic option that works relatively well.
Furnace filter ratings consumer reports.
We test airflow resistance which measures how freely air flows through the filter.
Last updated september 1 2020.
The filtrete ultra allergen reduction 1500 mpr filter earns a very good rating for removing smoke dust and pollen from the air with the system running on a high fan speed but is only.
However this rating is only used for 3m and filtrete brand filters both manufactured by 3m.
The higher the number the finer the filter so the more particles it traps.
10 best furnace filter reviews by consumer guide 2020.
If we were looking to buy a new filter today for our hvac heating ventilation and air conditioning system we d aim for a medium efficiency filter with a merv rating in the 8 to 13 range which.
But to trap particles as small as 1 micron you would want a furnace filter with an mpr rating of 2800.
It comes with a high efficiency media filter that is up to 95 efficiency in removing circulated dust mold spores and other particles from three microns.