855773520-LEED-v5-ID-C-Reference-Guide-Launch-Edition-1 - Page 335
Extracted Content
can increase occupant comfort and result in more efficient buildings by reducing reliance on air conditioning and heating.
To prevent thermal discomfort and wasted energy, projects must carefully manage cooling systems to avoid overcooling spaces during warmer seasons. Project designs must consider seasonal temperature changes, potential overcooling during non-temperate months, and the needs of occupants performing tasks with high metabolic rates. ASHRAE Standard 55-2023 outlines methods to determine acceptable thermal conditions in mechanically conditioned spaces and in occupant-controlled naturally conditioned spaces, considering occupants’ anticipated metabolic rate (activity level) and clothing, as well as environmental variables such as temperature and air speed. Projects must comply with ASHRAE Standard 55–2023 using the applicable method. To address the risk of overcooling in nontemperate/warm seasons, teams must refer to ASHRAE 55-2023, Informative Appendix E (Sections 8.1 and 8.2).
To avoid discomfort or physiological stress for people transitioning between thermal environments, specifically occupants entering from the outdoors, create zones with intermediate temperatures to allow gradual acclimatization and consider utilizing air movement as a cooling strategy. Transition spaces include spaces at the indoor/outdoor boundary (e.g., lobby entrance). Projects must also account for long-term occupants of these areas, including, but not limited to, receptionists or security guards, etc. Provide adaptability options, such as local air speed reduction, to allow long-term occupants to customize their microclimates (these design strategies may also contribute to Option 2. Adaptable Environment).
Provide thermal comfort support for occupants carrying out tasks requiring varying levels of movement. This must include considerations for occupants completing metabolically demanding tasks.
Option 4. Sound Environment
PATH 1. MAPPING ACOUSTICAL EXPECTATIONS FOR INDOOR AND OUTDOOR SPACES
Mapping involves establishing acoustical expectations for the project spaces and identifying design targets that increase the likelihood of achieving those expectations. Performing this mapping early in the design process minimizes the potential of locating incompatible spaces adjacent to each other.
The mapping exercise must include documenting acoustical expectations based on intended space function and related occupant needs. Standardized classifications for typical acoustical expectations may be used for this mapping exercise (see Table 5). Teams may refer to the USGBC worksheet to help guide this mapping process.
U.S. Green Building Council LEED v5 Reference Guide for Interior Design and Construction, April 2025 Launch Edition 324