855773644-LEED-v5-BD-C-Reference-Guide-Launch-Edition - Page 300

Extracted Content

• WUFI Passive Design Tool, following the Passive House Institute US protocol.

  • Passive House Planning Package, following the Passive House Institute protocol to determine maximum heating load and maximum cooling load.

Table 2. Points for meeting caps on the sum of peak heating and cooling loads

Points	New construction	Major renovation
1	16 Btu-h/sq. ft. (50 W/sq. m.)	20 Btu-h/sq. ft. (63 W/sq. m.)
2	12 Btu-h/sq. ft. (38 W/sq. m.)	15 Btu-h/sq. ft. (47 W/sq. m.)
3	8 Btu-h/sq. ft. (25 W/sq. m.)	10 Btu-h/sq. ft. (32 W/sq. m.)

OR

PATH 2. ASHRAE 90.1 TRADE-OFF METHODS (1–3 POINTS)

Comply with envelope and/or HVAC improvements for a maximum of 3 points.

Envelope loads (1–2 points) Demonstrate a percent improvement in the sum of system peak heating loads and system peak cooling loads associated with the proposed envelope performance factor compared to the base envelope performance factor determined in accordance with the ASHRAE 90.1-2022 Building Envelope Trade-off Option (Normative Appendix C) . Points are awarded according to Table 3.

Table 3. Points for percentage improvement in peak thermal loads from envelope

Points	Percent improvement
1	10%
2	20%

AND/OR

Ventilation Loads (1 point) Demonstrate a minimum 10% improvement in the sum of building peak coincident heating loads and building peak coincident cooling loads for the total system performance ratio (TSPR) proposed building design versus the product of the TSPR reference building design and ASHRAE 90.1-2022, Table L5-4, Mechanical Performance Factors (MPF), for the project’s location and climate zone determined in accordance with the ASHRAE 90.1-2022 Mechanical System Performance Rating Method (Normative Appendix L).

OR

U.S. Green Building Council LEED v5 Reference Guide for Building Design and Construction, April 2025 Launch Edition 290