The coverage
of your operating point
Before choosing a sizing tool, a professional checks that their projects fall within it. For every combination of total dynamic head and flow rate, the matrix below gives the power of the smallest controller that LE LAB can offer, backed by the manufacturers' official curves. A glance places your project within the coverage and gives the power to plan for.
| TDH ↓ / m³/h → | 0.5 | 1 | 2 | 3 | 5 | 8 | 10 | 15 | 20 | 30 | 50 | 75 | 100 | 150 | 200 | 250 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 450 | 4.0 | · | · | · | 48 | 48 | 48 | 48 | 48 | · | · | · | · | · | · | · |
| 350 | 4.0 | · | · | 22 | 22 | 22 | 22 | 39 | 39 | 48 | · | · | · | · | · | · |
| 300 | 4.0 | · | · | 18 | 18 | 18 | 18 | 22 | 33 | 39 | 90 | 90 | · | · | · | · |
| 250 | 1.4 | 1.4 | · | 15 | 15 | 15 | 15 | 18 | 22 | 33 | 90 | 90 | · | · | · | · |
| 200 | 1.4 | 1.4 | 4.0 | 13 | 13 | 13 | 13 | 15 | 18 | 28 | 44 | 90 | 90 | · | · | · |
| 150 | 1.4 | 1.4 | 2.5 | 4.0 | 8.3 | 11 | 11 | 11 | 13 | 20 | 32 | 47 | 90 | · | · | · |
| 125 | 0.7 | 1.4 | 2.5 | 4.0 | 7.7 | 7.7 | 7.7 | 11 | 11 | 17 | 27 | 41 | 90 | 90 | · | · |
| 100 | 0.7 | 1.4 | 1.4 | 2.5 | 4.0 | 7.7 | 7.7 | 7.7 | 11 | 14 | 23 | 36 | 41 | 90 | · | · |
| 75 | 0.7 | 0.7 | 1.4 | 1.8 | 2.5 | 4.0 | 5.1 | 5.1 | 7.7 | 9.5 | 17 | 26 | 31 | 90 | 90 | · |
| 50 | 0.3 | 0.3 | 0.7 | 1.4 | 1.8 | 3.9 | 3.9 | 3.9 | 5.1 | 7.5 | 11 | 17 | 21 | 35 | 44 | · |
| 40 | 0.3 | 0.3 | 0.7 | 0.7 | 1.4 | 2.5 | 3.9 | 3.9 | 3.9 | 5.4 | 11 | 13 | 21 | 30 | 44 | 45 |
| 30 | 0.3 | 0.3 | 0.3 | 0.7 | 1.4 | 1.8 | 3.9 | 3.9 | 3.9 | 5.4 | 7.6 | 11 | 16 | 23 | 30 | 45 |
| 20 | 0.3 | 0.3 | 0.3 | 0.7 | 0.7 | 1.4 | 1.4 | 3.9 | 3.9 | 4.0 | 6.9 | 8.7 | 11 | 16 | 23 | 23 |
| 10 | 0.3 | 0.3 | 0.3 | 0.3 | 0.7 | 0.7 | 1.4 | 1.4 | 1.4 | 1.8 | 4.0 | 4.6 | 5.8 | 12 | 16 | 23 |
| 5 | 0.3 | 0.3 | 0.3 | 0.3 | 0.7 | 0.7 | 0.7 | 1.4 | 1.4 | 1.8 | 4.0 | 4.6 | 4.6 | 12 | 16 | 23 |
From garden wells to deep boreholes
In the bottom left, the small installations, from 0.3 kW. In the top right, the high powers, up to 90 kW. Between the two, up to 5 ranges can meet the same point: the choice comes down to brand and borehole diameter.
Every figure comes from an official curve
Every figure is based on the pump's flow-head curve, taken from the manufacturer's documentation, and on the power it requires at that point. The application deduces the suitable pump from it, and the volume it will produce month by month.
The application calculates the total dynamic head from the borehole depth, the delivery head, the pipe length and diameter, head losses included.
Two pages detail this reading for the ranges with an external converter: the technical datasheet of the Grundfos RSI converter and the worked example of an SPE 77-9 at 75 metres.
What if my project falls outside the covered scope?
The grey cells identify configurations that require a specific technical study in collaboration with the manufacturer. These notably include applications with very high flow rate under high total dynamic head, installations fitted with very high-power submersible motors that can reach several hundred kilowatts, and architectures using several pumps operating in parallel. These projects fall outside the scope of standard sizing and require thorough technical validation to guarantee the performance, reliability and compliance of the installation.
What the subscription changes
The matrix is the same for everyone: the study is free and the entire catalogue is open. LE LAB Pro adds the tools of the trade: sizing on the worst month, climate conditions, solar array adjustment, panel selection and panel angle, autonomy with the water reserve, electrical configuration. The same study produces the report under your letterhead, the quote and the technical documentation; an AI assistant answers questions on the sizing.