C. 5 exposures
D. 10 seconds
A. Filtration
C. UV Inactivation
A. It has had no impact.
B. It has stayed about the same.
D. It has led to IAQ becoming the number-one searched term.
B. They don’t believe it will make a meaningful difference.
C. They think it will take too long to install.
B. 10
C. 20