7/13/2023 0 Comments Ashrae 90.1 vestibule requirements![]() without air curtains) and vestibule doors. ![]() ![]() Based on a new method to consider these dynamic effects on air curtains, this study uses a dynamic efficiency factor η B in terms of whole building site end-use energy to assess the efficiency of air curtains when compared to single doors (i.e. The efficiency of air curtain in reducing infiltration and associated energy usage is currently evaluated statically by using an efficiency factor, η air, based on single steady/static condition, which is often not the case for actual buildings under variable weather conditions and door usages.
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