Define duty and temperatures
Enter the heating or cooling requirement, design supply and return conditions and the applicable fluid basis.
Hydronic design software
Hydronic design software for flow and pipe sizing workflows
Use MEPFlow to turn heating or cooling duty into hydronic flow and pipe sizing decisions while keeping temperature difference, velocity and pressure loss visible.
Free to start. Built for mechanical design workflows in Canada and the United States.
Move from isolated calculations to a connected workflow
Hydronic sizing links thermal duty, fluid properties, design temperature difference, flow, velocity and pressure loss. MEPFlow keeps those connected quantities in one workflow so a change in an upstream assumption can be reviewed through the downstream sizing decision.
Convert heating or cooling duty into required hydronic flow.
Size piping while reviewing velocity and friction constraints.
Keep design temperature difference and fluid assumptions explicit.
Use repeatable project calculations without hiding the engineering basis.
From thermal duty to hydronic pipe size
Calculate system flow
Convert the thermal requirement into flow using the chosen temperature difference and fluid properties.
Review pipe sizing
Select pipe sizes with velocity, pressure loss, noise and pumping implications visible to the designer.
Hydronic design use cases
Mechanical engineers sizing heating-water and chilled-water distribution.
Designers comparing flow and pipe size under different temperature differences.
Teams standardizing hydronic calculation methods across projects.
Canadian and US firms that need transparent browser-based design workflows.
Frequently asked questions
How is hydronic flow calculated from heating or cooling duty?
Required flow depends on the thermal duty, fluid heat capacity and design temperature difference. Smaller temperature differences require more flow for the same duty.
What limits should be checked when sizing hydronic pipe?
Designers typically review velocity, pressure loss, noise, erosion risk, available pump head, control authority and system-specific requirements. Acceptable limits depend on the application.
Can hydronic sizing replace pump selection?
No. Pump selection also requires the complete system curve, critical-path losses, equipment pressure drops, control strategy, fluid properties and operating range.
Does MEPFlow calculate building heating and cooling loads?
Heating and cooling load calculations are planned, but this page describes the currently available hydronic flow and pipe sizing workflow. It does not claim a building load-calculation module is available today.
Put your next MEP calculation into a repeatable workflow
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