1. “Too Many MERV’s” ??
According to ASHRAE and IEST – 20 Possible Assignable MERV’s
Three “Markets”
E Arrestance MERV General Equipment
E Middle Efficiency MERV Equipment and People
E High Efficiency MERV Marginalized Health People
and Specialized End Uses
Real Differences Between the Markets
Arrestance High Efficiency
Real Differences Within These Markets
MERV MERV12
Difficulties
Variety of End Uses
Variety of Air Handling Types
Variety of Pollutants