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HVAC Air filter

Initial resistance, efficiency, dust holding capacity and filter classification for HVAC filter


w  
Testing standard:

  ISO 16890 Air filters for general ventilation:

        Part 1: Technical specifications, requirements and classification system based upon particulate matter efficiency (ePM)

        Part 2: Measurement of fractional efficiency and air flow resistance

        Part 3: Determination of the gravimetric efficiency and the air flow resistance versus the mass of test dust captured

        Part 4: Conditioning method to determine the minimum fractional test efficiency



EN 779:2012 Particulate air filters for general ventilation. Determination of the filtration performance


  ASHRAE 52.2-2017 Method Of Testing General Ventilation Air-Cleaning Devices For Removal   Efficiency By Particle Size



w   Testing standards

     EN 779:2012

     ASHRAE52.2:2017

     ISO 16890:2016

     Breach testing (Burst pressure)



 w   Testing Items:

Initial efficiency,

Initial pressure drop

Air flow rate vs. pressure drop

Efficiency after different dust loading phases

Dust loading capacity



 w   System specification

Air flow rate: 500~2500 CFM (850~4250 CMH)

Maximum resistance: 6000 Pa

Aerosol range: 0.3~10μm (KCl)0.2~3 μm (DEHS)

 

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ISO 16890 Filter Classification


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EN 779 Filter Classification

 
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ASHRAE 52.2 Filter Classification


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Comparison of HVAC air filter testing standards


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Filtration Testing 1244853