Test period

1-4 December 2014


9 high income households (35 people) living in Hanoi City with consistent water-supply pressure

Test site

3 rooms in a 5-star serviced apartment in Hanoi City

Experiment method

1) Install in each room’s machine room a flow meter (water supply sensor, hot water supply sensor), temperature sensor (thermocouple).

2) Install a water-saving shower (project device) in each room’s bathroom, and install a flow meter between the faucet and shower hose (cumulative flow display).

3) Measure the optimum flow rate of the existing shower using a representative of each household.

4) Each household in turn stays in one of the rooms for half a day and carries out usual life from dinner to the following morning’s breakfast. While the participants are staying, each person writes down on a set form the times of using the toilet, shower, faucets, washing machine, and dishwasher.

5) When participants use the shower they write the flow amount both before and after showering shown on the flow meter (2) on a designated form for showering.

6) Comparing the value on the flowmeter with the values written on the forms, deduce the amount of water used by each appliance.

Study items

・Hot and cold water usage and amount profile of 1 household per day

・Toilet・Shower・Faucets・Washingmachine・Dishwasher water amount consumed and time