Types of heaters
Water heaters are storage and instantaneous types. Cumulative work as a boiler they consist of containers of large size (from 30 to 250 liters), which is water. This water is gradually heated by using a heating element to predetermined values and, if consumption is immediately updated, while its temperature is kept constant. Running the heater has small volume storage tanks, the water is heated almost instantaneously due to the large electrical power devices of this type.
The choice of a particular type of heating unit depends on the needs of the family in hot water. In the case when the house is inhabited permanently and the hot water is needed all the time, it would be economically feasible to use a cumulative electric heater. If you want to improve hot water supply in the country, where people come from time to time, it would be cheaper to install a tankless heater.
Tankless heaters – compact devices to set them in the shower or the bathroom will not require much space.
How to choose tankless water heater
The main working characteristics of this device, of course, is power, because it needs the heaters instantly heat cold water to a comfortable temperature of at least 35oC, water consumption should be about 2-3 liters per minute. Minimum power for this type of heater shall be 3 kW, but if the intention is simultaneous consumption of a large amount of hot water, you should choose a heater with a capacity of 20 to 27 kW.
Flow heaters as well as cumulative, have the capacity to heat water, but its volume is small – a few liters. Naturally, you should pay attention to the material from which it is made, it must be resistant to high temperatures and chemical substances contained in the water. Longer serve you heater, the capacity of which is inside covered with a layer of enamel or the one in which its manufacture has been used brass or propylene.
The apartments and cottages electric tankless heaters are installed only in case if the existing wiring can withstand such a powerful device.
In that case, when you want to use a long heater, you should pay a little extra and buy one that is protected from the formation of limescale on the heating the heating elements and the inner surface of the container. In such models usually there is an indicator, which signals the necessity of replacement of PETN.
In the case when you have to give supplied gas communication, it makes sense to choose a gas tankless heater, which, at current electricity rates will allow you to save.