90.4 Pdf — Ashrae

Introduction to ASHRAE 90.4

Unlike the common Power Usage Effectiveness (PUE) metric used for operational monitoring, 90.4 is a design standard that uses two primary components for compliance: ASHRAE 90.4 Standard For Data Center Cooling - AKCP ashrae 90.4 pdf

PDF Resources

1. Energy Savings: By following the guidelines set out in ASHRAE 90.4, data center owners and operators can reduce energy consumption and lower their operating costs.
2. Improved Efficiency: The standard helps data centers optimize their cooling and power distribution systems, leading to improved efficiency and reduced waste.
3. Increased Reliability: ASHRAE 90.4 provides guidelines for designing and operating data centers that are reliable and resilient.

3. Review of the Search Term ("pdf")

Searching for "ashrae 90.4 pdf" usually implies a desire to download the standard. Introduction to ASHRAE 90

Option 1: Purchase Directly from ASHRAE (Official & Current)

The safest and most professional route is to buy the official PDF from the ASHRAE Bookstore (www.ashrae.org). As of 2025, the current version is ASHRAE 90.4-2022 (with possible addenda). Cost is typically $99–$150 for members, $150–$200 for non-members. Energy Savings : By following the guidelines set

Q2: Can I use ASHRAE 90.4 for LEED certification?

A: Yes. The LEED v4.1 BD+C Data Centers credit uses ASHRAE 90.4 as the baseline for optimizing energy performance.

The "AHRI 1360" Rabbit Hole

If you open the PDF, you will notice that 90.4 doesn't just give you a simple number. It forces you to use AHRI Standard 1360 to calculate your IT load diversity.

1. Your Geographic Location (Climate Zone)
2. The size of your IT load (kW)