Issue link: https://hi.iaq.net/i/630729
Developing an IAQ Profile 21 STEPS IN AN IAQ PROFILE The information needed for an IAQ profile is similar to that which is collected when solving indoor air quality problems, but includes the entire building rather than focusing on areas that may have caused an identified problem. The IAQ profile should be an organized body of records that can be referred to in planning for renovations, negotiating leases and contracts, or responding to future com- plaints. The process of gathering information for the IAQ profile can be divided into three major stages: 1. Collect and review existing records. 2. Conduct a walkthrough inspection of the building. 3. Collect detailed information on the HVAC system, pollutant pathways, pollutant sources, and building occupancy. The first two stages should be carried out as quickly as possible, but the third stage can be handled as time allows so that it does not interfere with other staff responsibilities. 1. Collect and Review Existing Records Review construction and operating documents Collect any available documents that describe the construction and operation of the building: architectural and mechanical plans, specifications, submittals, sheet metal drawings, commissioning reports, adjusting and balancing reports, inspection records, and operating manuals. Many buildings may lack some or all of these documents. If there are no commissioning reports or balancing reports, actual venti- lation quantities may be quite different from those indicated on mechanical design PRODUCTS OF THE REVIEW OF EXISTING RECORDS ■ a description of the HVAC system design and operation (e.g., original plans and specifications with changes indi- cated or new sketch plans and notes, commisioning reports, testing and balancing reports) ■ a set of operating instructions, maintenance and calibra- tion records for HVAC system components (e.g., fans, dampers, filters, chillers, boilers, and control systems) ■ an inventory of locations where architectural or engineering modifications have taken place ■ an inventory of locations in which current occupancy or HVAC system operation represents a change from the original design ■ an inventory of locations where complaints have been common in the past drawings. If there are no operating or maintenance manuals for HVAC equip- ment, it is difficult for staff to carry out an adequate preventive maintenance program. Study the original architectural and mechanical design so that you understand the building's layout and intended func- tions. Identify and note locations in which changes in equipment or room usage create a potential for indoor air quality problems and give them special attention during the walkthrough inspection. Items of interest and the questions they suggest could include the following: Commissioning reports ■ Was the building properly commissioned when it was first constructed, including testing and balancing of the HVAC system? Operating manuals ■ Do staff members understand how the HVAC equipment is intended to operate? Remodeled areas ■ Has the HVAC system layout been changed to accommodate new walls, rearranged partitions, or similar architec- tural modifications?