The Content Of The Article:

Domestic hot water

The extreme diversity of electric water heaters makes it possible to meet all sanitary hot water needs, whether regular or random, important or reduced.
Intelligent use of tariff options provides hot water at unbeatable cost.


  1. Installation rules for domestic hot water
  2. Sanitary water heating technique for every need

Installation rules for domestic hot water

A few simple rules will prevent you from waste the savings that these equipments must assure you.

  • The length of the pipes between the outlet of the water heater and the farthest point must not exceed 8 m, so as not to waste water and energy.
  • The insulation of the pipes contributes to reducing the consumption of energy, but also of water, because this one arrives more quickly at good temperature with the tap.
  • The power of the points of draining very far (more than 10 m) is done by installing two water heaters. This investment is quickly amortized by savings in electricity and water consumption.
  • The thermostat setting should be checked regularly: the ideal water temperature is between 60 and 65° C. Below, the bacteria proliferate; above, the risk of scaling resistance and the tank increases very quickly, and you expose yourself to burns.
  • The power supply of the water heater depends on its power and use. The storage unit should, whenever possible, be connected to a power supply with a "off-peak" contactor allowing it to consume only at night. No other electrical appliance should be powered by the same circuit. An instant heating appliance can be powered by the kitchen appliance circuit, if it is placed in this room. In washrooms, the water heater (class II) must be powered by a watertight pipe system.

Wiring diagram of a storage water heater with "off-peak" option

Wiring diagram of a storage water heater with option

Sanitary water heating technique for every need

This pressurized water heater, with a capacity of 10 liters, can be installed very easily, here under the sink.

This pressurized water heater, with a capacity of 10 liters, can be installed very easily, here under the sink.

The choice of a device corresponding as much as possible to the needs is guarantor of a sensible economy, both at installation and use.

  • The storage water heater is designed to meet daily needs and provides a large supply of water (75 to 450 liters depending on the model), commonly heated in less than 8 hours. Its unbeatable economy results from its ability to heat water with electricity taken in the "off-peak" tariff. The heating can always be restarted for an exceptional need, at any time, by operating a manual control.

  • The double-speed water heater, with a capacity of 100 to 300 liters, is a storage water heater with added resistance that quadruples the heating capacity and allows a quick response to a punctual need. This equipment responds to very irregular needs, both in volume of hot water and consumption schedule; but it is practical to replace a device whose capacity is insufficient, and which can not be substituted for another one of larger volume.

  • The reduced-capacity water heater uses the conventional technique of accumulation, but its low capacity (from 10 to 30 liters) makes it possible to obtainhot water in less than an hour. This device is especially interesting to support a main water heater, and more particularly when the increase in needs exceeds the capacities of the standard appliance and to supply a new point of more than 8 m (length of pipes) of the heating main water.

  • The instantaneous water heater heats the water as it is drawn, but its flow is limited and can only feed one point. This device is suitable for satisfying occasional needs (for example, a guest room shower), with a water-saving showerhead or showerhead, so also electricity.

The storage water heater

The storage water heater

(photos / visuals: © DIY-Prod, except special mention)

On the same topic

  • DIY tips
    • The construction of a passive house: the rules to be respected
    • Properly maintain an electric water heater
    • How to maintain and repair an electric water heater?
    • Install an instant water heater
    • Replace an electric hot water tank
  • Questions answers
    • What about cogeneration boilers?
    • Where can a water seep come from an electric balloon?
    • Tips for maintaining a thermodynamic balloon
    • What are the advantages of an instant water heater?
    • Problem of hot water temperature by solar water heater
    • How to speed up the arrival of domestic hot water?
    • What choice for hot water?
  • products
    • Electric and thermodynamic water heaters ARISTON

This may interest you

Video Instruction: How to balance Domestic Hot Water systems