scope:

FOREWORD

The Indoor Air Quality Procedure (IAQP) has a long history going back to the 1981 standard. It has flexibility.

For design, it requires the following (simplified version):

1. Identifying contaminants of concern

2. Determining indoor and outdoor sources

3. Identifying a concentration limit and exposure period

4. Specifying percentage of building occupants to be satisfied with perceived IAQ

5. Performing a mass balance analysis for selected compounds

Weaknesses in current requirements exist in items 1, 3, and 4 above. The percentage in item 4 may be specified to any quantity, i.e., the percentage of satisfied occupants can be set to zero. No measurement of any resulting concentration is currently required, so the effectiveness of any design is not measured or verified.

Addendum aa adds a minimum requirement of percentage of people satisfied and requirements for designing to specific limits for design compounds and particulate matter. The design compounds are specifically identified. Mixtures are specifically identified. Objective and subjective testing are added.

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.