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Choosing the right water heater


Water Heater

Electricity consumption in the residential sector: 5.7%

Water heaters are the 5th highest electricity consuming appliance in Hong Kong households.

Choosing the right water heater                                          

There are two common types of electric water heaters available in Hong Kong, each employing distinctive functionalities and energy consumption.


Storage type: This type of heater contains a water tank. Water is heated up and stored when the heater is switched on. Generally speaking, a 15 to 20 litres storage type heater is sufficient for a family of four.


Instantaneous type: This type of heater heats up water instantly and is more popular in new built houses due to more advanced power generation setups. It operates at a power rate as high as 20,000 watts, equivalent to paying nearly $9 if you take a shower for half an hour. Gas water heaters are normally instantaneous type.

1.Replace your shower head with low-flow type as it can save heating cost and about 36,500 litres of water per year for a family of four.
2.Turn down the thermostat of your water heater in warm weather. Reducing the temperature of your water heater from 60°C to 49°C will save 200 kg of C〇2 per year.