LEED v5 BD+C Rating System_November 2025_clean - Page 100

Extracted Content

Balanced Ventilation

Design the ventilation and exhaust airflows within 10% of each other and include a testing, adjusting, and balancing (TAB) report demonstrating balanced ventilation in the commissioning scope. This requirement does not apply to Core and Shell projects.

AND

Infiltration

Use an air leakage test to demonstrate a measured air leakage of the building envelope less than or equal to Table 1. Buildings smaller than 25,000 square feet (2,322 square meters) must use a whole-building air leakage test.

- Complete air leakage testing using ASTM _E779_, _ANSI/RESNET/ICC 380_, _ASTM_

E3158, ASTM E1827, or equivalent.

- For buildings greater than 5,000 sq. ft. (465 sq. m.), maximum air leakage is

determined per square feet or square meter of building envelope area (including exterior walls, roofs, and base floor/slab).

- For projects that include both new construction and major renovation, use the

weighted average maximum air leakage.

Table 1. Caps on Air Leakage Rates

Building Conditioned Floor Area (CFA)	Pressure Test Conditions Across the Building Envelope	Maximum Air Leakage1	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/m2)	0.20 cfm/sq. ft. (1.0 L/s/m2)
≥ 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/m2)	0.27 cfm/sq. ft. (1.35 L/s/m2)
< 5,000 sq. ft. (465 sq. m.)	At 50 pascals (0.2 in in H2O)	1 ACH	1.5 ACH
< 5,000 sq. ft. (465 sq. m.)	At 75 pascals (0.3 in H2O)	1.35 ACH	2 ACH

OR

Residential (2 points)

Balanced Ventilation. Meet the New Construction requirements.

AND

INFILTRATION

U.S. Green Building Council LEED v5 Reference Guide for Building Design and Construction, November 2025 Edition 93