What pump flow rate and head mean
Flow (m³/h or l/h) — how much heat carrier the pump can move. Head (m) — against pressure losses in the circuit (pipes, radiators, valves). Read both with the curve, not the “biggest number”.
Examples: Evosta 130, Evosta 180, PICO 1-4, PICO 1-6, DUCA 25-80-130.
Why “with reserve” hurts
An oversized pump can cause valve noise and unnecessary energy use. Better: project / old label / hydraulic calculation.
sizing · when you need it · main guide · Pumps.
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