In hydronic proportional balancing, the key idea is to set circuit balancing devices so that (conceptual) what holds across parallel branches at design (or set) condition?

Choices

• (A) All branch DP equal to 0 in all nodes
• (B) Tower approach always 5F
• (C) Design flow share or ΔT/flow ratio in each path relative to the index run, to avoid starving distant terminals
• (D) NPSH of fan only