Posts by nafa@nafahq.org

07/10/2023 From: Todd McGrath, (ASHRAE) Chair SSPC 52.2 Subject: Correction Regarding the Terms “MERV 17-20” To Whom It May Concern, I am writing to address a common misunderstanding regarding the terms “MERV 17-20” and provide clarification to ensure accurate information is given. As the current Chair of SSPC 52.2, I believe it is important to…

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