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NAFA Technical Seminar April 19, 2012

ANSI/ASHRAE 52.2 Can we fix this Method of Test?. NAFA Technical Seminar April 19, 2012. History of the Test procedure. 10+ years in development prior to 1999 release

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NAFA Technical Seminar April 19, 2012

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  1. ANSI/ASHRAE 52.2 Can we fix this Method of Test? • NAFA Technical Seminar • April 19, 2012

  2. History of the Test procedure • 10+ years in development prior to 1999 release • Task of 52.2 Committee "create a test method based on particle size removal efficiency for end user evaluation of filter performance" • Research projects led to greater understanding of the physical science in filtration • MERV - scales were created with minimal data and educated guesses at value spread

  3. Committee Efforts • Std published in 1999 for the first usage • No revisions through 2007 (other than edits) • 2008 Arrestance and DHC were added from 52.1 predominantly for MERVs 1-4 • 52.1 was removed from ASHRAE Standards • Addition of "Voluntary Conditioning Step"

  4. MERV's Status? • ASHRAE Rating system? • No certification of personnel performing tests • No policing entity to produce a rating system

  5. ISO Standards • Working groups creating standards for • Cleanroom and HEPA usage completed • UVC, Rotating Equipment, dust collection • Working group 3 - General HVAC filtration is looking to use 52.2 MOT for developing PM efficiency values

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