Is there a comparison between MERV ratings for furnace filters and CADR rat tings for air purifiers?
Looking to buy an air purifier and was trying to compare/find the difference between MERV ratings on a furnace filter and CADR ratings for an Air Purifier.
MERV:
Minimum Efficiency Reporting Value, commonly known as MERV Rating is a measurement scale designed to rate the effectiveness of air filters.
The scale is designed to represent the worst case performance of a filter when dealing with particles in the range of 0.3 to 10 microns. The MERV rating is from 1 to 16. Higher MERV ratings correspond to a greater percentage of particles captured on each pass.
CADR: Clean Air Delivery Rate (CADR) indicates the volume of filtered air delivered by an air cleaner. CADR also determines how well an air cleaner reduces pollutants such as tobacco smoke, pollen and dust. The higher the tobacco smoke, pollen and dust numbers, the faster the unit filters the air.