Filters within a MERV rating of 17-20 are almost never necessary in a residential home. A MERV rating of 13-16 is considered hospital level air quality, so it is unlikely your home needs any more than that.Sep 20, 2019
How long does MERV 16 filter last?
A MERV 16 filter is the most restrictive and will likely need to be changed every 3 to 6 months. Yes, they are more expensive than the average filter, but you get what you pay for.Nov 19, 2014
What is the difference between Merv 8 and MERV 11?
MERV 8 vs MERV 11 AIR FLOW Fine air particles are 2.5 microns and smaller. At that size, the air particles can get into lung tissue and enter the bloodstream. MERV 11 air filters can filter out a large percentage of fine particles, but a MERV 8 air filter can't.