This works just like a restroom exhaust and makeup system. This means you can use makeup air from Class 1 space to condition the kitchen. Meter).Ĭommercial Kitchens are listed as Class 2 air spaces. It is an exhaust space per ASHRAE 62.1-2007 and is covered in Table 6-4 (0.7 CFM/SF or 3.5 L/sec/Sq. That isn't the right way to do it.Ī kitchen is regularly occupied. This does impact the amount of OA required but I generally see engineers exclude the ventilated exhaust space as if they did not exist. the same system providing OA to offices and restrooms. I also find it odd that, at least on my projects, reviewers never question the inclusion of restrooms and other exhaust spaces where the designer is providing ventilation air as part a multizone ventilation design: e.g. I have always found it odd that LEED reviewers only question ventilation for Table 6.1 spaces and never question exhaust Table 6.2 requirements. If the class of air is Class 1 then you'll likely get stuck with using an equivalent ventilation rate from Table 6.1. Be prepared to include a definition for the class of air in an exhaust space. If you providing exhaust and claiming an equivalence per Table 6.2 you can defeat a review claim to provide ventilation but you will have to prove the proper exhaust is provided. This is where a LEED reviewer can chose to challenge you. Unfortunately, you have to use your judgement defining what a space type is. They seem to disappear.ĭefinitions for equipment rooms, closets and storage rooms are not included in ASHRAE 62.1. Closets would fall under the same requirement. They have zero Ra and Rp ventilation requirements in Table 6.1, and are not included in Table 6.2 as exhaust spaces. Storage rooms and elevator machine rooms are included in Table 6.1 with zero Rp and double the small Ra rate of electrical equipment rooms. ![]() I think you'll find most space types are covered.Įlectrical equipment rooms have zero Rp and a small Ra rates. Also, check normative Appendix E, Health Care. Take a look at Table 6.2 in the standard. Anyone has experience or insight to this issue? But I also aware of another project that was flagged by GBCI. I am aware of a project received exception from GBCI to exclude some of the spaces. It appears the frequency and duration of the space usage could be the reason to exclude spaces from 62.1 compliance. However, "Occupied Spaces" in 62.1 is defined as "an enclosed space intended for human activities, excluding those space intended primarily for other purposes, such as storage rooms and equipment rooms, that are only occupied occasionally and for short periods of time. Question: If the rooms are not occupyable rooms, are they subject to the minimum OA rates in the ASHRAE 62.1-2007 standard? It makes no sense to use more energy to provide outside air to these spaces, contradicts the purpose of being energy efficient?Īccording to 62.1-2007, section 2.1 indicates "the standard applies to all spaces intended for human occupancy except those within singel-family houses, multi family structures." Then section 6.1.2 indicates "This is a design procedure in which OA intake rates and other system design parameters are based on an analysis of containment sources, containment concentrations target and perceived acceptability targets." Based on these two paragraphs, it appears the code applys to all the spaces that human MAY have access to.
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