Improving the timing control of your existing hot water system or replacing it completely with point of use electric hot water systems can produce significant savings.
Hot water in schools is generally provided by a central gas boiler which then continuously circulates the hot water in a loop around the school. Sometimes these gas-based systems are supplemented by more local electrically powered immersion or point of use heaters.
Circulatory gas-based hot water systems in schools are generally very inefficient, averaging about 15%
We estimate your hot water efficiency to be 5.5%
The table below shows that 81% of the energy used to heat your hot water is used outside of school opening times. Adjusting your boiler settings to ensure that you are only heating water when it is needed could save you £31,000 per year. Costs in this table are presented using your school’s current gas tariff.
Or you could investigate replacing your current hot water system with point of use electric heaters.
Daily kWh | Daily £ | Annual kWh | Annual £ | |
---|---|---|---|---|
School day (open) | 480 | £37 | 94,000 | £7,100 |
School day (closed) | 1,100 | £84 | 220,000 | £16,000 |
Weekends | 1,400 | £110 | 110,000 | £8,300 |
Holidays | 980 | £74 | 89,000 | £6,800 |
Total | 510,000 | £39,000 |
To reduce the amount of energy used to heat water in your school:
Calculations based on Gas consumed between 02 Dec 2022 and 30 Dec 2024
The following characteristics are used when analysing your school energy data. Temperature compensation uses weather data specific to your school's location.
Characteristic | Value |
---|---|
Floor area | 18020.0m2 |
Location | S12 2SF (-1.432127, 53.357424) |
Pupils | 990 |
Type | Secondary |
Consumption costs are estimated based on historic tariff information
Future savings are estimates based on your school's latest tariff information
Potential cost savings quoted in school comparisons, e.g. for comparable "well managed" and "exemplar" schools are also based on your school's current tariffs
School comparisons are based on benchmarking your school against comparable schools based on the characteristics outlined below.
"Exemplar" schools represent the top 17.5% of Energy Sparks schools
"Well managed" schools represent the top 30% of Energy Sparks schools