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Publications

Guidelines

Best Practice Guidelines

NAFA publishes best practices and guidelines for several facility applications based on the experience and expertise of their membership, as well as current mandates and research provided by governmental and scientific communities. HVAC and air filtration professionals should use NAFA’s Best Practices and Guidelines as a tool to educate their clients on how to protect their facilities’ occupants.

Guide 2021

NAFA Guide to Air Filtration

Your source for information about air filtration – from the basic principles of filtration and the different types of filtration devices to information about testing, specialized applications and the role of filtration in Indoor Air Quality. The Guide also contains information about industrial finishing, cleanrooms, filtration efficiencies for hospitals and healthcare facilities and updated information about ASHRAE 52.2 – 2012. (Available in English, 6th Edition and Spanish 5th Ed.)
See the Table of Contents.

Document - ISO 16890

Guide to ISO 16890

This International Organization for Standardization (ISO) 16890 “Understanding ePM and ISO Coarse” User Guide was created by the National Air Filtration Association Foundation, a NAFA non-profit organization. This guide and the application of the particulate contamination removal standard ISO 16890 “Air filters for general ventilation” are intended to assist end-users and specifiers in their selection of appropriate air filtration products and understanding the ePM values in the 16890 test reporting. This guide also aims to help users understand the similarities and differences between this test and ASHRAE 52.2 and its MERV.

cover mock ups IOM 5th 2023

Installation, Operation and Maintenance (IOM) of Air Filtration Systems - just updated in 2024.

The IOM Manual serves as the primary curriculum for NCT Exam preparation, offering invaluable guidance for both novice air filtration salespersons and engineers entering the industry.

The manual's comprehensive content aims to enhance understanding of air filtration principles and the diverse options available. It is designed to ensure optimal operation of air filtration systems for various applications.

While primarily targeting HVAC/R Technicians, Building Engineers, Building Maintenance Personnel, and HVAC/R and Air Filtration Sales and Business Development professionals, the guide can also be utilized by designers as a checklist for essential details required in designing effective air filtration systems.

(Available in English, 5th Edition and Spanish, 3rd Edition)


See the Table of Contents.

Document - MERV image 2024

Understanding MERV

This ANSI/ASHRAE Standard 52.2 “Understanding MERV” User Guide was created by the National Air Filtration Association (NAFA), an international group of air filter distributors, manufacturers and engineers. This Guide, and the application of a particle-based contaminant removal standard prescribed by ANSI/ASHRAE Standard 52.2-2017 “Method of Testing General Ventilation Air-Cleaning Devices for Removal Efficiency by Particle Size,” are intended to assist end-users and specifiers in their selection of appropriate air filtration products and understanding of the MERV values in the 52.2 test reporting.

A note on "MERV 17-20." View letter from ASHRAE SSPC52.2 Chair, dtd 7/10/2023