Tag: Air filters MERV
Before the CADR was developed, filters were rated by a standardized test—in the U.S., this test was known as ASHRAE Standard 52.1 (ASHRAE 1992).
READ MORE + Before the CADR was developed, filters were rated by a standardized test—in the U.S., this test was known as ASHRAE Standard 52.1 (ASHRAE 1992).
READ MORE +