New provisions provide credits or incentives for the use of on-site/off-site renewable energy and heat recovery systems. Continuous Maintenance:
The ASHRAE 90.4-2025 version marks a significant evolution in the standard’s mission: ashrae 904 pdf upd
: Designers can now achieve compliance without a traditional economizer by following the ASHRAE TC 9.9 Thermal Guidelines (5th Edition). New provisions provide credits or incentives for the