How it is correct to choose a household water heater?
Came summer - time is repair - scheduled maintenance in city networks of supply of hot water. During its shutdown it is difficult to do without the self-contained unit, a household water heater.
But before going to shop behind purchase, let`s study the theory of a question. What water heater best of all will be suitable for the city apartment? Of course, that which the most economic also provides with hot water of all, in it living.
It appears, there are only several types of household water heaters which differ in dimensions, the capacity and the principle of action. They can be subdivided on gas flowing (they still are called columns), gas accumulative, electric accumulative and electric flowing. Flowing models compact also heat water in process of its passing through heat-transmitting elements. Unlike them, accumulative water heaters have solid capacity for heating of water and the subsequent its expense.
The advantage of electric flowing water heaters is their compactness and the fact that they heat water at once when opening the crane. However they have features which should be considered.
In - the first, flowing devices give out not hot but only water, warm, but quite suitable for hygienic and domestic needs.
In - the second, only rather powerful water heaters can provide a large amount of heated water (8 kW and more). In town houses of old building and at dachas with single-phase electricity of the allocated power for such device just will not be enough.
Therefore during planned cutoffs of hot water usually use electric flowing heaters with power from 3 to 5 kW. Enough in the ordinary socket is simple to thrust their cord. In new buildings and houses with electric stoves experts can connect the 6 kW water heater.
Those who are more senior are well familiar with the devices called in days of old by geysers. Modern gas flowing heaters, of course, differ from old models - they are absolutely safe and easy-to-work. They are cut in a pipe of cold water supply and included simple pressing of the button (model with pyezorozzhigy) or turn of the crane of hot water (model with electronic ignition). Depending on geyser power, it is capable to give a minute 5-7 liters of hot water, that is as much how many gives the open crane. Advantages - the small weight, high-quality and fast heating, work on cheap fuel.
We will smoothly pass to accumulative to models.
Time accumulative - means, has the tank for water from 10 to 200 liters. The principle of work of an electric accumulative water heater - gradually to bring water temperature in a tank to 75 °C, and then to support her at this level. Time of heating depends on the power of the device and capacity of its tank. For an example, 15 - the liter tank with water heats up approximately for half an hour, and 200 - liter - in 5 - 6 hours.
Use of accumulative model is optimum in that case when a lot of hot water is required, and the power supply network in the apartment or at the dacha does not allow to install the powerful flowing heater. The matter is that accumulative demand for the work from only 1,2 to 2,5 kW of the electric power.
One more of their advantage is that water analysis of hot water can be carried out on several points at once, that is it is possible to use at the same time a shower and to wash the dishes in kitchen. A shortcoming - the impressive size of a water heater. Therefore for apartments most often buy devices up to 50 liters.
Not so popular gas accumulative water heaters as electric, however, undoubtedly, more favorable, gas it is notable cheaper than electricity. They are made in floor (to 100 l) and wall options (50-100 l). Advantage consists in lack of difficult electronic and hydraulic components. Therefore gas accumulative water heaters serve long without carrying out any prevention.
The main shortcoming - need to provide ventilation of the room where such water heater is established, or to do a flue for removal of exhaust gases. Therefore gas accumulative water heaters usually use at dachas and in country houses.
What water heater to choose for the apartment? Let`s estimate in popularity - it is enumerable the main producers and estimated prices.
Electric accumulative water heaters:
AEG, power is 2,0 kW, volume is 30 l, the price is 6900 rub;
Electrolux, power is 1,6 kW, volume is 30 l, the price is 6200 rub;
Ariston, power is 1,6 kW, volume is 30 l, the price is 4600 rub
Gas accumulative water heaters:
TATRAMAT, volume is 80 l, time of heating of 45 °C / 45 min., the price is 17000 rub;
Ariston, volume is 50 l, time of heating of 45 °C / 45 min., the price is 12800 rub;
BAXI, volume is 50 l, time of heating of 40 °C / 45 min., the price is 12600 rub
Electric flowing water heaters:
Bosch, power is 4,0 kW, productivity of l/min. 2,5, the price is 7800 rub;
Electrolux, power is 8,0 kW, productivity of l/min. 4,0, the price is 69800 rub;
Termeks, power 2,5 kW, productivity of l/min. 3,0 are, the price is 2800 rub
Gas flowing water heaters:
AEG, power is 20 kW, productivity of l/min. 5, the price is 5500 rub;
Vaillant, power is 10 kW, productivity of l/min. 5, the price is 6700 rub;
Beretta, the power of 180 kW, productivity of l/min. 11, the price of 7000 rub
Thus if in your house there is a three-phase network, then it is possible to put any water heaters: powerful flowing or economic accumulative.
And if the electric network weak, but is available gas, that is sense to choose the gas device.