ASHRAE+62.1-2022+(1) - Page 032

Extracted Content

7.1.4.2 Protective Measures. Measures shall be employed to reduce the migration of construction-generated contaminants to occupied areas.

Informative Note: Examples of acceptable measures include, but are not limited to, sealing the construction area using temporary walls or plastic sheathing, exhausting the construction area, or pressurizing contiguous occupied areas.

7.1.5 Air Duct System Construction. Air duct systems shall be constructed in accordance with the following standards, as applicable:

a. The following sections of ANSI/SMACNA 006, HVAC Duct Construction Standards—Metal and Flexible :

   - Section S1.9 of Section 1.3.1, “Duct Construction and Installation Standards”

   - Section 7.4, “Installation Standards for Rectangular Ducts Using Flexible Liner”

   - Section 3.5, “Duct Installation Standards”

   - Section 3.6, “Specification for Joining and Attaching Flexible Duct”

   - Section 3.7, “Specification for Supporting Flexible Duct”

   - Sections S6.1, S6.3, S6.4, and S6.5 of Section 9.1, “Casing and Plenum Construction Standards”

b. All sections of SMACNA’s Fibrous Glass Duct Construction Standards c. NFPA 90A, Standard for the Installation of Air-Conditioning and Ventilating Systems d. NFPA 90B, Standard for the Installation of Warm Air Heating and Air-Conditioning Systems

7.2 System Start-Up 7.2.1 Application. The requirements of this section apply to the following ventilation systems:

a. Newly installed air-handling systems b. Existing air-handling systems undergoing supply air or outdoor airflow reduction (Only the requirements

of Section 7.2.2 shall apply to these altered systems.) c. Existing air-handling distribution systems undergoing alterations affecting more than 25% of the floor

area served by the systems (Only the requirements of Section 7.2.2 shall apply to these altered systems.)

7.2.2 Air Balancing and Verification of Outdoor Air Performance. Ventilation systems shall be balanced in accordance with ASHRAE Standard 111 or another applicable national standard so as to verify conformance with the total outdoor airflow requirements of this standard ( Vot ).

7.2.3 Testing of Drain Pans. To minimize conditions of water stagnation that may result in microbial growth, drain pans shall be field tested under operating conditions that are the most restrictive to condensate flow to demonstrate proper drainage.

Exception to 7.2.3: Field testing of drain pans is not required if units with factory-installed drain pans

have been certified (attested in writing) by the manufacturer for proper drainage when installed as recommended.

Informative Note: Above conditions usually occur at full fan airflow for draw-through fans and minimum fan airflow for blow-through fans.

7.2.4 Ventilation System Start-Up. Ventilation air distribution systems shall be clean of dirt and debris. 7.2.5 Outdoor Air Dampers. Prior to occupancy, each ventilation system shall be tested to demonstrate that outdoor air dampers operate in accordance with the system design.

7.2.6 Documentation. The following ventilation system documentation shall be provided to the building owner or his/her designee, retained within the building, and made available to the building operating personnel:

a. An operations and maintenance (O&M) manual describing basic data relating to the O&M of ventilation

systems and equipment as installed b. HVAC controls information consisting of diagrams, schematics, control sequence narratives, and mainte nance and/or calibration information c. An air-balance report documenting the work performed for Section 7.2.2 d. Construction drawings of record, control drawings, and final design drawings e. Design criteria and assumptions

7.3 Indoor Air Quality Procedure Verification 7.3.1 Objective Evaluation. Perform design compound (DC) and PM2.5 measurement in the completed building to verify that design limits (DLs) are met. The peak concentration over an 8-hour occupied period shall not exceed the DL for carbon monoxide.

For ozone and PM2.5, the average concentration measured over an 8-hour occupied period shall not exceed the DL.

30 ANSI/ASHRAE Standard 62.1-2022