Mars Air atmosphere is everything

Learning Center

X Close

    Vestibule or Mars Air Curtain?

    How much do you want to spend? How much space can you afford to lose?

    The American Society of Heating, Refrigerating and Air-Conditioning Engineers (ASHRAE) has adopted Standard 90.1-2019, Energy Standard for Buildings Except Low Rise Residential Building that dictates that commercial air curtains in doorways are approved alternatives to space-encroaching vestibules in most commercial buildings.

    Designing a commercial space to make optimal use of the square footage is a principal driver and leading business objective. With commercial space lease rates expected to continue to rise in 2020 and beyond, sales per square foot and rent per square foot are calculations that can change the profitability equation if not well managed

    Finally, there is now additional support for the owner/operator’s need to design a space that works to advance their commercial interests while eliminating the space-encroaching vestibule that reduces usable square footage and forces designs that infringe on profitability.

    ASHRAE LOGOAmerican Society of Heating, Refrigerating and Air-Conditioning Engineers adopts Standard 90.1-2019 dictating air curtains can replace vestibules

    Download Article

    CHOOSE YOUR MARS AMCA-CERTIFIED AIR CURTAIN SOLUTIONS

    This new standard, that applies to retail, healthcare, hospitality, office and other commercial spaces, dictates that commercial air doors must be approved and tested by ANSI/AMCA Standard 220 for assurance of a 122-m per minute airstream velocity at the floor for complete protection. Mars offers AMCA-certified air curtains (also known as a fly fan) that are also independently tested to meet Mars rigorous standards.

    STUDIES PROVE AIR CURTAIN EFFECTIVENESS TO REPLACE VESTIBULES

    Studies establish* that whole building annual energy consumption, modeled with the air curtain door, is less in all climate zones when compared to the modeled vestibule door. The modeled air curtain door can reduce energy consumption by 0.3 percent to 2.2 percent in colder climate Zones 3-8, but marginal for Zones 1 and 2, as no changes were made to the operating characteristics of the air curtain. The study also established that the building entrance orientation, frequency of use and the balance of the building HVAC system (pressure) affect air infiltration/exfiltration, and the overall energy performance of the air curtain.
    * Investigation of the Impact of Building Entrance Air Curtain on Whole Building Energy Use,” was conducted by Liangzhu Wang, PhD, Assistant Professor at the Department of Building, Civil and Environmental Engineering of Concordia University, Montreal, Canada.

    A recent study published by AMCA International evaluated the effectiveness of air curtains (commercial air curtain) and confirmed that when compared to a vestibule, air curtains consistently meet or outperform vestibules in energy savings. The most recent study, “Investigation of the Impact of Building Entrance Air Curtain on Whole Building Energy Use,” was conducted by Liangzhu Wang, PhD, Assistant Professor at the Department of Building, Civil and Environmental Engineering of Concordia University, Montreal, Canada. Dr. Wang compared the cost effectiveness of an air curtain mounted over a single-entry door versus a vestibule using an approach that integrated three types of modeling software: ANSYS Fluent for the CFD simulation, TRNSYS for the energy modeling, and CONTAM for modeling building air pressure and infiltration. The study illustrated that whole building annual energy consumption, modeled with the air curtain door, is less in all climate zones when compared to the modeled vestibule door. The modeled air curtain door can reduce energy consumption by 0.3 percent to 2.2 percent in colder climate Zones 3-8, but marginal for Zones 1 and 2, as no changes were made to the operating characteristics of the air curtain. The study also established that the building entrance orientation, frequency of use and the balance of the building HVAC system (pressure) affect air infiltration/exfiltration, and the overall energy performance of the air curtain.
    The IECC is published by the International Code Council (www.iccsafe.org), “a member-focused association dedicated to developing model codes and standards used

    BUSINESS OBJECTIVE

    VESTIBULE
    EFFECTIVENESS

    MARS AIR CURTAIN
    EFFECTIVENESS

    PROTECT CLIMATIZED INTERIOR AIR (HEATED OR COOLED) SOMEWHAT
    If all doors remain closed almost all the time can be effective
    EXCELLENT WITH OBSTRUCTION-FREE SUPPORT FOR FREE & RAPID PASSAGE
    PROTECT INTERIOR FROM FLYING PESTS SOMEWHAT
    Open doors allow for pest transfer
    SUPERIOR PERFORMANCE EVEN WITH OPEN DOORS
    KEEP BUILDING INTERIOR CLEAN MAYBE
    Depending on volume of traffic and door opening
    EXCELLENT PROTECTION EVEN WITH OPEN DOORS & WIND
    SAVE ENERGY COSTS SOMEWHAT
    Effective If all doors stay closed
    SUPERIOR PERFORMANCE
    FREE FLOWING TRAFFIC NO YES WITH NO OBSTRUCTION
    EFFECTIVE TO 122-M PER MINUTE AIRSTREAM (as required by code) NOT APPLICABLE YES