Doorway air curtains were approved June 2019 as alternatives to vestibules on most commercial building entries in the upcoming ASHRAE Standard 90.1-2019 “Energy Standard for Buildings Except Low Rise ...
For many HVAC contractors, updates to ASHRAE Standard 90.1-2019 “Energy Standard for Buildings Except Low Rise Residential Buildings” on air curtains this summer didn't exactly make for “breaking news ...
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