scope:

FOREWORD

In reviewing Addendum a, it was noticed the filter requirements listed for nursing homes are not consistent with the informative appendix table for recommended filter efficiencies by space type. Resident rooms are noted as requiring MERV-14 in the informative appendix as "Resident rooms in a skilled nursing area." However, other resident spaces were assigned MERV-8 under the category of "Any room, inpatient or outpatient, where a patient stays less than 6 hours including waiting rooms." This is incorrect in that (a) residents are not patients and (2) residents frequently spend amounts of time exceeding six hours outside of their room in these areas of the facility. Addendum r increases filtration in nursing homes to MERV-14. Prior to Addendum a, these spaces required a MERV-13 filter.

Section 6.4(i) is revised to not include Table 9.1, because in Table 9.1 the only spaces that do not permit room recirculation are 100% exhaust spaces. The prohibition on room recirculation units within these spaces has less to do with concern over access to room recirculation equipment, and that equipment serving as a future source of contaminants, and more to do with the contamination within the space itself. The installation of filters downstream of all wet aircooling coils and the supply fan is not justified as a minimum requirement for the 100% exhaust spaces.

Note: In this addendum, changes to the current standard are indicated in the text by underlining (for additions) and (for deletions) unless the instructions specifically mention some other means of indicating the changes.