This video see about New HVAC Air filter Efficiency rating Standard ISO 16980.
Why ISO 16890 is the Future for HVAC Filters?
Filter Classes According to ISO 16890.
ISO 16890 Ratings.
Difference Between EN779 and new ISO standard?
Why a new filtration standard ISO 16890?
What is different?
How is ISO 16890 different from EN 779?
What does PM1 mean?
