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Pump Selector
Ctrl+D to bookmark this toolEnter your duty flow rate and pressure drop to find matching circulator pumps. Free, instant results.
Duty point
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Flow rate
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Pressure drop
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Formula: 1 m head = 9.81 kPa 1 L/s = 3.6 m³/hr
Pump selection based on duty point. Both flow and head must be met by the pump at its rated operating point.
Typical circulator pump duties
Common duty points for LTHW and CHW systems. Actual duties depend on system design, pipe sizing, and index circuit pressure drop.
| Application | Flow (L/s) | Head (m) | Notes |
|---|---|---|---|
| Domestic heating | 0.3 – 0.8 | 2 – 4 | Small bore, residential |
| Underfloor heating | 0.5 – 1.5 | 3 – 6 | Manifold system |
| Small commercial LTHW | 1.0 – 3.0 | 4 – 8 | Office, retail |
| Medium commercial LTHW | 2.0 – 6.0 | 6 – 12 | Multi-storey |
| CHW circuit | 1.5 – 5.0 | 5 – 10 | Chilled water distribution |
| Condenser water | 2.0 – 8.0 | 8 – 15 | Cooling tower circuit |
MEP Desk includes full pipe sizing with pressure drop, pump duty calculations, and system balancing tools — all connected to your project data.