Instantaneous electric water heater: how to choose, list of models - Setafi

Have you ever thought that there is a boiler that heats water without prior accumulation in the tank? No, this is not fiction and not another marketing ploy. An instantaneous water heater is designed for just such a situation - it is a portable device that heats the liquid while turning on the tap and supplying water. Its simplicity and versatility allow it to compete with large boiler plants, winning in some situations, which we will discuss next.

The principle of operation of the equipment

Since the water heater in its dimensions does not exceed the size of an ordinary tea cup or medicine box, there are few elements in it:

1. a box in which all the stuffing is packed;
2. set of heaters;
3. indicators of temperature and water supply;
4. circuit breakers.

In good condition, the whole system works according to the following scheme:

• Water, when the tap is turned on, gets inside a small tank, activating the sensors of the device.
instagram viewer
• The pressure sensor activates the system of heating elements - their number varies from the desired outlet temperature.
• The fluid takes over the heat fluxes from the elements.
• Water with the desired temperature is discharged through the pipes from the heater and supplied to the consumer.

In more expensive models, you can find a complicated design - the heaters are covered with a layer of heat-exchange material, which prolongs the life of the device and improves heat transfer.

Device options

Before moving on to the question "how to choose a tankless water heater", it is worth talking about their varieties in general. Your head will “explode” if you come to the store, and there are several dozen protochniks with their own characteristics and modes. With such a variety it is difficult to make the right choice.

The main parameters of variability are the design and the method of adjustment. According to how the heaters work, there are such models:

• Pressure. They are mounted on a pipe, thereby providing water heating for several outlets at once. This system requires knowledge in installation and is an order of magnitude higher than competitive types.
• Non-pressure. They are installed on the mixer and heat water only for it. One point - you need an additional installation of a thermostatic tap, but you might be lucky - water heaters often come with a mixer.

According to the method of setting and control, there are:

1. Hydraulic. A simple design with a minimum of settings - on / off modes and temperature modes (or maybe without them at all).
2. Digital. A well-coordinated system of settings for water pressure, electricity consumption and the desired temperature.

Keep in mind that each type differs in cost: the more features, the more expensive.

How to choose an electric instantaneous water heater

In this section, we will talk about the criteria for selecting an apparatus and introduce several brands of “exemplary” instantaneous water heaters.

The main thing you should pay attention to in the first place is performance. For example, for a washstand, an indicator of 3 l / min is enough, for washing dishes - 5 l / min, and for a comfortable shower, the indicator will already be from 8 l / min. The temperature may also vary. Before going to the store, immediately decide what you will use the device for.

Extra options:

1. safe mode from overheating;
2. surge protection;
3. automatic switch when closing the mixer;
4. activity sensors;
5. various rust and sediment filters.

Among all the brands, it is worth highlighting models from the companies Electolux, Thermex, Ariston, Stiebel. They have manual and electronically controlled products, their devices have proven to be reliable and durable, and the price varies in a wide range from 2-3 to 25 thousand rubles - you can choose both a budget and a premium option for your needs.