I am running into two interpretations for the location of the "permanent entryway system." One argues that the system should be outside the entry door so pollutants are scraped off and left outside the enclosed indoor space. The other argues that the system should be inside the entry because a mat outside could get wet and muddy thereby adding to the dirt and contaminants brought inside. Research on the issue has not revealed which is satisfying the intent of this point. i look forward to your interpretation.
The intent of EQc5 is to prevent contaminants from entering the building which could have an effect on the indoor air quality. However, the location of the permanent entryway system, for example grills and grates, is subjective, depending on the layout of the building. If there is a vestibule it may be appropriate to have a walk off area located within it. Also, exterior walk-off areas may be considered if the area is protected from weather. Alternatively, the walk-off area can be within the building. Applicable internationally.UPDATED October 1, 2012: Please see updated guidance for this LEED Interpretation under a LEED Interpretation Ruling 10098 posted date 8/01/2011. Projects registered on or after this date must use the new ruling.