Since ASHRAE standards are copyrighted documents, I cannot provide a direct PDF download link. However, I have developed the following helpful guide to assist you in understanding the standard, finding the official document, and navigating its key requirements. 1. What is Standard 90.4? While ASHRAE 90.1 covers general commercial buildings, Standard 90.4 is specifically designed for Data Centers and Telecommunications Buildings with a power density greater than 20 W/ft². Monarch Nems V2.4 Software Download Apr 2026