Last updated september 1 2020.
Furnace filter ratings consumer reports.
It is imported from outside countries and its rated number one filter by customer reports.
Consumer reports tests air filters for homes with forced air heating and cooling systems.
The lowest 300 mpr is a basic option that works relatively well.
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.
The higher the number the finer the filter so the more particles it traps.
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.
We test airflow resistance which measures how freely air flows through the filter.
However this rating is only used for 3m and filtrete brand filters both manufactured by 3m.