Practical calculators and field guides for engineers designing coolant loops: data-center CDUs, cold plates, and electric-motor cooling. Written by a product-development engineer with 25 years in thermal management — not by a marketing department.
Open the free pump calculator Read the sizing guideHeat load in → required flow, loop pressure drop, and pump power out. Water or glycol, with a full Darcy–Weisbach pressure-drop estimate.
Run the calculator →The complete method: the heat-load equation, choosing ΔT, estimating pressure drop honestly, and reading a pump curve so the operating point lands where you intended.
Read the guide →The guide, the full spreadsheet calculator pack (parallel branches, pump-curve matching, glycol derating), and design checklists — everything in one download.
See what's inside →Pick a flow and a hose size — get your loop tier (does it need a reservoir? a baffled one?), a hose-velocity check, and a complete parts list with every fitting, coupler, and clamp in one consistent size.
Build my loop →Standing up a liquid loop in a test lab and not sure where to start? This series covers the parts list, assembly order, fill & bleed, and instrumentation — written from real lab builds, not catalog copy.
Start with pump sizing →AI-era racks are pushing past what air can cool, and a wave of engineers is being handed liquid-cooling projects with no playbook. Vendor white papers sell hardware; textbooks stop at theory. This site covers the practical middle: how to size it, what to watch out for, and which fittings, hoses, and quick disconnects actually work together — with the math shown.