There is more than one way to generate the annual energy use breakdown by end-use, and in most buildings it will require a combination of strategies. Start by identifying the major end-uses, and then consider which of the following strategies will work best for each end-use.

Submeters

The best option in this situation may be to split the entryway system between the interior and exterior so that a total of ten feet of compliant mat is achieved. See the FAQ above for more details. The ten-foot requirement is strict, so projects that don’t have this length of compliant entryway systems are not eligible for the credit.

Typical building carpet is not designed to capture and hold particulates, so it is not considered a compliant entryway system under this credit. Remember that the intent of this credit is to improve indoor air quality by preventing the introduction of pollutants into the building interior. Most carpet simply isn’t designed with this in mind. Unless you can provide compelling documentation from a manufacturer that shows your carpet is designed to effectively capture dirt, pollen and other particulates, you won't be eligible for this credit.

This strategy works in some cases, based on LEED-NC Interpretations #5585, #5696 and #10098, not all of which have been specifically evaluated for the LEED-EBOM rating system. Per the Interpretations, this strategy can only be pursued if the portion located outside the building is protected from weather (which generally takes the form of an awning, overhang, or the second story for most buildings). It appears that use of exterior systems is more likely to be approved if the building can’t comply with the ten-foot minimum due to physical limitations.

No, you can combine multiple mats to make up ten feet of linear mat.

Yes, compliant entryway systems are required for entrances from both loading docks and parking garages. Only entries to private offices, emergency exits, and entries not used during the performance period can be excluded from the credit.

Mats are not required to be sent out for cleaning. If your in-house cleaning program is able to maintain your entryway systems, you do not need to seek outside cleaning professionals.

There is no explicit requirement for how frequently entryway systems must be cleaned. A good cleaning program will take into consideration the types of particulates that are likely to be introduced into your building via foot traffic, your indoor air quality goals, and the cleaning needs of the specific entryway system/materials being used. You may also want to consider whether cleaning practices need to be adjusted seasonally to address changes in weather.

The owner will need to buy additional RECs to meet the threshold.

You can document this credit as late as when you submit your clarifications for the construction review. You can even do it after that, and before you accept your final certification, but you'll have to pay an appeal fee.