LEED v5 BD+C Rating System_November 2025_clean - Page 161
Extracted Content
Residential
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Meet the preceding requirements for all areas inside and outside the building except dwelling units and private balconies.
- For residential projects that do not prohibit smoking, each dwelling unit where smoking will be permitted must meet the following compartmentalization requirements:
o Perform a blower door test of residential dwelling units, following the procedures in
ANSI/RESNET/ICC 380 or equivalent. For each unit tested, demonstrate a maximum leakage of enclosure area that is no more than 1.5 times the thresholds identified in Table 1 (“enclosure area” refers to all surfaces enclosing the dwelling unit, including exterior and party walls, floors, and ceilings). Demonstrate a weighted average leakage of enclosure area for the building, including dwelling units, that complies with the caps in the limits identified in Table 1.
Table 1. Caps on Air Leakage Rates
| Building Conditioned Floor Area (CFA) | Pressure Test Conditions Across the Building Envelope | Maximum Air Leakage | Col4 |
|---|---|---|---|
| Building Conditioned Floor Area (CFA) | Pressure Test Conditions Across the Building Envelope | New Construction | Major Renovation |
≥ 5,000 sq. ft. (465 sq. m.) | At pressure difference of 50 pascals (0.2 in H2O) | 0.13 cfm/sq. ft. (0.65 L/s*sq. m.) | 0.20 cfm/sq. ft. (1.0 L/s*sq. m.) |
≥ 5,000 sq. ft. (465 sq. m.) | At pressure difference of 75 pascals (0.3 in H2O) | 0.18 cfm/sq. ft. (0.90 L/s*sq. m.) | 0.27 cfm/sq. ft. (1.35 L/s*sq. m.) |
| < 5,000 sq. ft. (465 sq. m.) | At 50 pascals (0.2 in H2O) | 1 ACH | 1.5 ACH |
At 75 pascals (0.3 in H2O) | 1.35 ACH | 2 ACH |
meter.
U.S. Green Building Council LEED v5 Reference Guide for Building Design and Construction, November 2025 Edition 154