Hot Water Consumption vs. Occupants
Flow rate and temperature are the primary factors to be determined in the hydraulic and thermal design of water-heating and piping systems.
The table below indicates hot water consumption per occupant or person in typical buildings:
| Type of building | Consumption per occupant | Peak demand per occupant | Storage per occupant | |||
|---|---|---|---|---|---|---|
| liter/day | gal/day | liter/hr | gal/hr | liter | gal | |
| Factories (no process) | 22 - 45 | 5 - 10 | 9 | 2 | 5 | 1 |
| Hospitals, general | 160 | 35 | 30 | 7 | 27 | 6 |
| Hospitals, mental | 110 | 25 | 22 | 5 | 27 | 6 |
| Hostels | 90 | 20 | 45 | 10 | 30 | 7 |
| Hotels | 90 - 160 | 20 - 35 | 45 | 10 | 30 | 7 |
| Houses and flats | 90 - 160 | 20 - 35 | 45 | 10 | 30 | 7 |
| Offices | 22 | 5 | 9 | 2 | 5 | 1 |
| Schools, boarding | 115 | 25 | 20 | 4 | 25 | 5 |
| Schools, day | 15 | 3 | 9 | 2 | 5 | 1 |
Related Topics
• Water Systems
Design of hot and cold water service and utility systems with properties, capacities, sizing of pipe lines and more.
Related Documents
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Design hot water consumption of fixtures - basins, showers, sinks and baths.
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Free online tool for designing water supply systems in buildings.