Parameter	Description
Flow	Cumulative flow for the system, based on the flow for individual components in the system.
Reynolds Number	Calculation formula
Relative Roughness
Flow State	The Flow State is determined by the value of the Reynolds Number. A Reynolds Number less than 2,000 is considered laminar flow. A Reynolds Number greater than 4000 is considered turbulent flow. Numbers between 2,000 and 4,000 are unpredictable and no loss calculation is made. Two types of turbulent flow: transition and complete turbulence.
Friction Factor	Friction factor used in Darcys equation is calculated based on the flow state Laminar Flow Turbulent Flow
Velocity
Friction	The pressure loss for a specific length unit of pipe.
Pressure Drop	The total pressure drop for the entire length of pipe.

Hydronic Piping Instance Properties

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