What Are the Different Types of MERV Filters for HVAC Filter for Virus Use
A virus measures 0.1 microns. No residential HVAC filter catches particles that small. That sounds like a filtration dead-end until you learn what viruses actually travel on. They ride respiratory droplets out of infected lungs, and those droplets fall in the 0.3 to 5 micron range — exactly where the right filter can catch them. … Read more