ASHRAE+62.1-2022+(1) - Page 033

Extracted Content

Table 7-1 Allowed Laboratory Test Methods

Compound Allowed Test Methods

VOCs except formaldehyde, acetaldehyde

and acetone

ISO 16000-6; EPA IP-1, EPA TO-17; ISO 16017-1; ISO 16017-2;

ASTM D6345-10

Formaldehyde, acetaldehyde and acetone ISO 16000-3; EPA TO-11; EPA IP-6; ASTM D5197

Carbon monoxide ISO 4224; EPA IP-3

Table 7-2 Direct Reading Instruments Minimum Specifications

Ozone PM2.5 Carbon Monoxide

Accuracy (±) 5 ppb Greater of 5 µg /m [3] or

Greater of 5 µg /m or Greater of 3 ppm or

20% of reading 20% of reading

20% of reading

Resolution (±) 1 ppb 5 µg/m [3] 1 ppm

Table 7-3 Number of Measurements Points

Total Occupied Floor Area, ft [2] (m [2] ) Number of Measurements

≤25,000 (2500) 1

25,000 (2500) and ≤50,000 (5000) 2

50,000 (5000) and ≤100,000 (10,000) 4

100,000 (10,000) 6

For all other compounds, the concentration measured over the maximum period allowed by the test method up to 8 hours shall not exceed the DL for each DC. For DC mixtures, the mixture calculation shall be less than 1.0. The concentrations shall be measured using the relevant laboratory methods specified in Table 7-1. Inorganic compounds and PM2.5 may be measured instead using direct-read instruments that are calibrated in accordance with the device manufacturer’s recommendations, are capable of measuring below the DL, and that follow the performance requirements specified in Table 7-2.

7.3.1.1 Design Compounds and PM2.5 Measurement Test. The measurement equipment shall be positioned in the breathing zone. The measurement shall be conducted with the HVAC system in normal operation and lowest outdoor air intake setting expected during the year. The number of measurement points shall be specified according to Table 7-3.

7.3.2 Subjective Evaluation. Using a subjective occupant evaluation conducted in the completed building, the survey test results shall demonstrate occupant level of acceptability of 80% or more within each zone served by the system.

Informative Note: Informative Appendix N presents one approach to subjective occupant evaluation. Exception to 7.3.1 and 7.3.2: Objective and subjective evaluation are not required for every substantially

similar zone. The minimum outdoor airflow rates shall be not less than those found in accordance with Sections 7.3.1 and 7.3.2 for a substantially similar zone.

Informative Note: For example, in a building with 100 single-person private offices of the same area, it is not necessary to perform an objective and subjective evaluation in each office as long as the minimum outdoor airflow for each office is greater than or equal to the airflow in the office that is tested according to Section 7.3.2. A ventilation zone is similar by definition if it has the same occupancy category (see Table 6-1), occupant density, zone air distribution effectiveness (see Section 6.2.1.2), and design zone primary airflow (see Section 6.2.4.3.2 and Normative Appendix A) per unit area.

7.3.3 Documentation. Documentation shall include methodology of testing, test results and any adjustments to design outdoor air from the values determined in Section 6.3, if applicable.

8. OPERATIONS AND MAINTENANCE

8.1 General 8.1.1 Application. The requirements of this section apply to buildings and their ventilation systems and their components constructed or renovated after the adoption date of this section.

ANSI/ASHRAE Standard 62.1-2022 31