Write the requirement first

A listing on this site is a record. It is not an endorsement. The data comes from vendor websites and from Overture Maps, and the site dates each fetch. A listing helps you find a vendor. It does not tell you if the vendor fits your rack.

This site gives education and records, not engineering advice.

Write the requirement

Before you contact a vendor, write down these items:

• The heat load per rack or per row, in kW.
• The share of that heat that goes into liquid, and the share that stays in room air.
• The coolant supply temperature limit and the allowed temperature rise. Take both from the liquid cooling specification of the server maker.
• The flow and the pressure that the server maker states for each rack.
• The ASHRAE W class that your facility water can meet.
• The cooling method you want: direct-to-chip, immersion or rear-door heat exchanger.
• Where the heat goes: to facility water or to room air.
• Racks now, and racks in the next phase.

Use listing fields as leads

Use the fields in a listing to build a short list. Then check each field on the vendor's own site and in writing. A field is a lead. It is not proof.

Use one requirement for every vendor. A vendor who sees a different requirement gives you a different answer, and you cannot compare the quotes.

Sources

• Questions to ask a liquid cooling vendor before you buy, guide on this site
• ASHRAE TC 9.9, Thermal Guidelines for Data Processing Environments, 5th edition (2021)
• Listing notes and the disclaimer on this site