Calculator
Dialysis Water Consumption Calculator
Estimate dialysis treatment water demand from station count, sessions, treatment hours, and dialysate flow.
Calculator Inputs
Sessions per station per day must be a valid number.
Legend
Dialysis Water Consumption Calculator guidance
Daily dialysate water demand = stations x sessions per station per day x treatment hours x dialysate flow x 60.
Input meaning
- Dialysis stations: enter the measured, quoted, or hospital-approved value.
- Sessions per station per day: enter the measured, quoted, or hospital-approved value.
- Treatment duration: enter the measured, quoted, or hospital-approved value in hours.
- Dialysate flow: enter the measured, quoted, or hospital-approved value in L/min.
Result interpretation
- Use the result as a planning estimate, not as a final approval by itself.
- Record the assumptions used so Procurement, Biomedical, Facilities, Finance, and vendors can review the same basis.
Assumptions
- RO feed water demand is higher than product-water demand because reject flow and disinfection cycles consume water.
- Confirm final sizing with the dialysis water system supplier and local water quality requirements.
Biomedical use
- Use this calculator during RFQ preparation, technical evaluation, acceptance planning, service review, or biomedical workload planning.
How to identify the required values
Use these examples and common working ranges to choose values from gauges, labels, manuals, datasheets, RFQs, service reports, CMMS records, or hospital planning assumptions.
| Field | Example value | Common range | Tip |
|---|---|---|---|
| Dialysis stations | Example: 1. | Dialysis units often model installed stations plus future expansion stations. | Use active treatment stations plus approved expansion if relevant. |
| Sessions per station per day | Example: enter the measured or approved planning value. | Common outpatient planning is 2-3 sessions per station per day. | Use the dialysis unit's planned daily shift pattern. |
| Treatment duration | Example: 8 hours. | Intermittent use often 4-12 h/day; continuous ICU/utility use is usually 24 h/day. | Use real operating hours, not department opening hours if equipment remains on. |
| Dialysate flow | Example: 10 L/min. | Usually 0.1 L/min or higher; use the real hospital value. | Use the actual set flow or expected average flow for the clinical scenario. |
Common ranges are starting points for hospital planning. For final procurement, acceptance testing, electrical design, medical gas design, radiation shielding, dialysis water systems, or clinical use, replace the example values with site-specific data and vendor-confirmed figures.
Input Checklist
Confirm these values before relying on the output for procurement, PM, or service planning.
- Dialysis stations
- Sessions per station
- Treatment hours
- Dialysate flow
Safety And Engineering Notes
Use calculator outputs as planning estimates and verify critical systems with calibrated measurement or qualified engineering review.
- RO feed water demand is higher than product-water demand because reject flow and disinfection cycles consume water.
- Confirm final sizing with the dialysis water system supplier and local water quality requirements.
Related Calculators
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RO Reject Water Calculator
Estimate RO reject water from permeate flow and recovery percentage.
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