The results were a minefield. Click-bait sites, shady repositories asking for credit card details for a "free" public standard, and broken links. He clicked on a promising link from a technical forum. A PDF began to download.
Choose your cooling strategy (DX, chilled water, economizers, liquid cooling). Calculate your proposed mechanical power draw at design conditions. If your – you comply. ashrae 90.4 pdf
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ASHRAE Standard 90.4 is the specific energy code for the design, construction, operation, and maintenance of data centers and telecommunications buildings. While ASHRAE 90.1 covers commercial buildings generally, 90.4 was developed to address the unique energy loads and environmental requirements of mission-critical facilities (server rooms, data halls, etc.). The results were a minefield
The MLC allowance can be very tight for small facilities because overhead doesn't scale linearly. Solution: The standard allows a "simplified approach" using packaged equipment with listed efficiencies. A PDF began to download
If you obtain a copy of the standard, here is what you will find inside:
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