855773644-LEED-v5-BD-C-Reference-Guide-Launch-Edition - Page 538
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floor height, based on the location of an occupant’s head when seated or standing. Alternative mounting heights based on the anticipated occupant position in a space may be considered.
Where possible, place monitors at least three feet (0.9 meters) away from doors, windows, air filters, air supply outlets, exhaust intakes, stoves, printers, and other potential airborne contaminant sources or sinks. In areas where this is not possible, locate monitors closer to air returns than air diffusers.
Monitors located in ducts do not meet the requirements.
Monitor specifications Select indoor air monitoring devices that measure carbon dioxide (CO2), fine particulate matter (PM2.5), total volatile organic compounds (TVOC), temperature, and relative humidity. Monitors must meet the building grade requirements of RESET Grade B [191] or UL 2095 Grade B .
Hourly reporting Monitors must report hourly (or higher frequency including 15-minute data for CO2) data to a remote location that logs pollutant levels over time. A digital display, or integration with the building management system, is not required to achieve the credit.
Table 4. RESET Grade B monitor specifications
| RESET Grade B monitor specifications | CO2 | PM2.5 | TVOC | Temperature | Relative humidity |
|---|---|---|---|---|---|
| Data loss | 10% | 10% | 10% | 10% | 10% |
| Operating range for temperature | 0–40℃ | 0–40℃ | 0–40℃ | 0–40℃ | 0–40℃ |
| Operating range for relative humidity | 10-80 % RH non-condensing | 10-80 % RH non-condensing | 10-80 % RH non-condensing | 10-80 % RH non-condensing | 10-80 % RH non-condensing |
| Data output interval | 5 min | 5 min | 5 min | 5 min | 5 min |
| Sampling type | Active airflow | ||||
| Sensor output resolution | 5 ppm | 1 μg/m3 | 4.4 ppb | 0.1℃ | 1 % RH |
| Measuring range | 400–5000 ppm | 0-500 μg/m3 | 65-870 ppb | 0-40℃ | 10-80 % RH |
| Accuracy* | 400–2000 ppm : ±50 && 3% 2000–5000 : ±50 && 5% | 0 - 150 : ±5 && 15% 150 - 500 : ±5 && 20% | 65 – 260 ppb : ±8.7 && 15% 260 - 870 : ±8.7 && 20% | ±1℃ | ±8% RH |
191 “Indoor Air Quality Monitors”, RESET, GIGAbase Canada, (2025), accessed April 5, 2025, https://reset.build/directory/monitors/type/indoor.
U.S. Green Building Council LEED v5 Reference Guide for Building Design and Construction, April 2025 Launch Edition 528