Ashrae 90.4 Pdf
: ASHRAE provides a Read-Only Version for public viewing of older editions (such as 90.4-2016 and 90.4-2019) to assist with code compliance.
The standard provides varying MLC limits based on the specific climate zone where the data center is built. For example, a data center in a mild, arid climate is allowed different baseline expectations than one in a hot, humid region. ashrae 90.4 pdf
While covers general building energy, it is often too rigid for data centers. 90.4 provides the specialized, alternative path. ASHRAE 90.1 ASHRAE 90.4 Focus General Commercial Buildings Data Centers/Mission Critical Method Component-specific rules Performance-based (MLC/ELC) Load Assumes low-density heat Accommodates high-density heat Applicability General offices, retail IT racks, servers, UPS, HVAC : ASHRAE provides a Read-Only Version for public
The full official PDF is a copyrighted document that must be purchased from ASHRAE or an authorized distributor. However, free access to all is available on the ASHRAE technology portal. Some academic and public libraries offer free read-only access through their electronic resources. While covers general building energy, it is often
Governs the building envelope, lighting, service water heating, and traditional HVAC systems of the overall facility. For a data center building, the office spaces, lobbies, and exterior lighting still must comply with Standard 90.1.
| Feature | ASHRAE 90.1 | ASHRAE 90.4 | | :--- | :--- | :--- | | | Commercial buildings (offices, malls, hotels) | Data centers, server rooms, telecom facilities | | Focus | Envelope, lighting, HVAC, service water heating | IT equipment cooling and power delivery efficiency | | Key Metric | Energy Cost Budget (ECB) & Prescriptive packages | Mechanical Load Component (MLC) & Electrical Loss Component (ELC) | | Climate Handling | Climate zones (1-8) | Specific data center climates (based on dry-bulb temperature) |
Yes. The LEED v4.1 BD+C Data Centers credit uses ASHRAE 90.4 as the baseline for optimizing energy performance.