Average volume of water used per day per basin in a salon. Value based on a study ran on 16 salons across metropolitan France, for 3 weeks (270 days x 2 basins equipped = 540 data points).
Coefficient to take into account the real opening days of a salon over the year. Hypothesis taken: a salon is opened 5 days out of 7 per week (taking into account bank holidays and summer break).
Coefficient to convert water volume [m3] into heating consumption [kWh]. Hypothesis taken: all salons are equipped with an electric boiler, mains water temperature = 16°C, boiler heating temperature = 55°C, boiler efficiency = 70%.