LEED v5 O+M Rating System_February 2026 - Page 059
Extracted Content
PATH 2. AUTOMATED DEMAND SIDE MANAGEMENT (1 POINT)
Have in place a control system that automatically sheds 10% of peak electricity demand for a minimum of one hour in response to triggers denoting strain on the grid or high grid emissions. Examples include:
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Data obtained through an API indicating high grid emissions
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Peak demand tariff period, when the grid is operating in the highest demand window
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Time-of-use rate when pricing is highest
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Signal from a demand response aggregator
OR
Option 2. Building Envelope Performance (1 point)
PATH 1. LOW AIR LEAKAGE (1 POINT)
Demonstrate a measured air leakage rate of the building envelope that is less than or equal to the maximum air leakage rates in Table 1 (for Path 1). Air leakage testing must have occurred no later than eight years before the end of the 12-month reporting period.
Table 1. Limits on Air Leakage Rates
| Building Conditioned Floor Area (CFA) | Pressure Test Conditions Across the Building Envelope | Maximum Air Leakage |
|---|---|---|
| ≥ 5,000 sq. ft. (465 sq. m.) | At pressure difference of 50 pascals (0.2 in H2O) | 0.27 cfm/sq. ft. (1.4 L/s/sq. m.)***** |
| ≥ 5,000 sq. ft. (465 sq. m.) | At pressure difference of 75 pascals (0.3 in H2O) | 0.35 cfm/sq. ft. (1.8 L/s/sq. m.)***** |
| < 5,000 sq. ft. (465 sq. m.) | At 50 pascals (0.2 in in H2O) | 2.5 ACH |
| < 5,000 sq. ft. (465 sq. m.) | At 75 pascals (0.3 in H2O) | 3.4 ACH |
NOTE: Complete air leakage testing using ASTM E779, ANSI/RESNET/ICC 380, ASTM E3158, ASTM E1827, or equivalent.
- For projects ≥ 5,000 square feet (465 square meters), air leakage is per square feet or square meters of building envelope area. cfm = cubic feet per minute; ACH = .
OR
PATH 2. REDUCED AIR LEAKAGE RATES (1 POINT)
Demonstrate a minimum reduction in air leakage rates of 25% through air leakage testing before and after alterations are implemented. Both air leakage tests must have occurred no later than eight years before the end of the 12-month reporting period.
U.S. Green Building Council LEED v5 Reference Guide for Operations and Maintenance, November 2025 Edition 53