Understanding Minimum Flow: Why It Matters in HVAC Systems

Minimum flow is a critical but often overlooked requirement in HVAC pumping systems. In this video, we explain what minimum flow means, why pumps and equipment need it, and what happens when a system runs below that threshold.

You’ll learn:

• How minimum flow requirements affect pump and system design
• What minimum flow means for a pump and for equipment like chillers and boilers
• Why running below minimum flow causes overheating, cavitation, and premature wear
• How variable flow systems can drop below minimum flow at low load
• Common ways to protect against low flow: bypass valves, minimum flow valves, and control strategies

Need help with pumps, heat exchangers, pressurisation units, valves, or prefabricated plantroom solutions? Contact Masterflow Solutions to discuss your project requirements.