An instant hot water dispenser or boiling water tap is an appliance that dispenses hot water without making use of a geyser. There are hot-only and hot and cool water models, and the water may be filtered as well as heated. Instant hot water dispensers became popular in the 1970s. Instant hot water dispensers are very similar to portable shower devices; the latter is fitted with a heating element and quickly heats up water, once a switch has been activated.
A hot water dispenser which keeps water hot in a tank uses the energy needed to heat the water to the required temperature, and wastes the energy needed to keep the water hot permanently in a thermally-insulated tank when not being used. These tank type dispensers often also consists of energy wasting ‘keep warm’ and ‘reboil’ functions.
Whereas, an instant hot water dispenser without a tank does not waste significant energy. Only when hot water is needed, the instant heater consumes at least 2000 watts to produce hot water at 92°C and above. The hot water flow rates is flowed at approximately 20 litres per hour. Comparing this with the insulated tank type of hot water dispensers that consumes approx 500w, the amount of energy savings to produce 20 litres of hot water is at least 5 times faster. The savings not only comes from the speed, but also instant hot water dispensers do not ‘keep warm’ nor ‘reboil’. In fact, it furthers provide the convenience that users need not switch off the appliance when not in use.
Coming soon – a directory of Instant Hot Water Dispenser suppliers in South Africa