Perhaps by count but not by weight. Allergies are dose-responsive, i.e. it works by weight. Particle weight increases as the cube of its size. I love high MERV filters but you're getting less improvement in captured particle weight out of the air with each increase in MERV rating (i.e., from 7 to 8 will likely be a greater improvement than 13 to 14). The reason you should use high MERV filters is not the % captured. It's that particles that penetrate the deepest into our bodies are the smallest. Coarse particles are rejected easily by our respiratory system.
Originally Posted by Gross
-If you won't turn it on then nothing else matters.