TOP-5 actual instantaneous electric water heaters

The compact instantaneous water heater Thermex Surf 6000 stands out for its affordable price in its class, the minimum linear dimensions of a rectangular body of 20x13.5 cm with a very shallow depth of 7 cm and a light weight of 1.3 kg. The model will be a good tool for supplying warm and hot water to owners of country houses, small private housing and visitors to public facilities where there is no centralized hot water supply. The device is designed for vertical mounting, power supply from a household single-phase network (230 V, 50 Hz) and operation in conditions of atmospheric humidity up to 80% at an ambient temperature of +3 °C to +40 °C. This "protochnik" is equipped with a spiral heating element made of stainless steel with a power of 6 kW and is able to serve one point of water intake. The device is designed for non-pressure connection to the flow regulator (faucet).

A big plus of the model is the complete set of the water heater with a shower head with a hose and a wall holder, which allow you to use shower procedures right out of the box after installation. The model provides decent performance when heating water from the initial temperature: at 25 ° C - 3.4 l / min and at 35 ° C - 2.5 l / min. The heating is controlled hydraulically, i.e. it depends on the amount of flow regulated by the inlet valve. The less water passes through the spiral, the higher the temperature of the heated water will be, and vice versa. Since a temperature of 35 - 40 ° C is quite enough for a shower, at the exit from the watering can you can get a comfortable amount of warm water for the procedure. There is no display on the body of the device, which has class 1 electrical protection and IPX4 water protection, and you can find out that it is heating water by the LED indicator signal. The device is additionally equipped with protective functions against overheating and from switching on without water.

The Thermex Trend 6000 instantaneous electric water heater is an advanced model with a thermostat and a digital display that allows you to adjust the outlet water temperature from 35 °C to 50 °C using touch buttons. The device is designed for universal vertical wall mounting and can be mounted both above and below the sink : all you have to do is orient the 1/2" connecting pipes in the desired position. After that, the water heater automatically determines the type of installation for the correct display of readings on the front panel. The device is quite demanding on the purity of water, as a result of which it is recommended to supply water to it through a coarse filter installed on the water supply system. The device is designed for operation at a minimum pressure of 0.08 MPa, and with an inlet pressure of more than 1 MPa, it is necessary to connect through a reduction gearbox (filter and gearbox are not included in the delivery).

A feature of the device is electronic control of heating with automatic maintenance of the set temperature in conditions of changes in pressure and temperature of the water at the inlet. In this case, the device independently adjusts the power of the heating coil. The high power of the heating element 6 kW, made of durable stainless steel, and the "delicate" electronics require a competent electrical connection of the device with a cable of the recommended cross section of 4 mm2. A solid heating capacity of 3.4 l/min at ∆t=25 °C, the possibility of pre-setting the water flow and the built-in automatic start-up by opening a tap provide comfortable maintenance of several points of water intake. The water heater received built-in protection against electric shock (class 1), overheating and "dry" inclusion, as well as dust and water protection class IP25. Included with the water heater is a mounting plate with a set of fasteners.

Electric instantaneous water heater Electrolux NP 6 AQUATRONIC 2.0, belonging to a small-sized line of models, is characterized by an ergonomic body, good equipment, convenient controls and the ability to connect several points of water consumption. A device with an index of 6, indicating the power of the heating element in kW, is the eldest in the family: it has a “twin” Electrolux NP 4 AQUATRONIC 2.0 with a 4 kW spiral heating element. The device is made in a designer rectangular case with corner roundings, lacks an indication of heating and such excesses as a display, which is in a more expensive version marked Digital.

Meanwhile, the filling and capabilities of the water heater are impressive. Separately, it is worth noting the high-quality copper heating element with the innovative Pullsten heater vibration protection technology, which significantly reduces scale deposits. The maximum output of the heating element is 2.8 l/min when the water is heated 29 °C above the inlet temperature, and the device is able to add a heating temperature from 20 °C to 50 °C to the room temperature of the inlet water. In this case, the value of the minimum flow at a pressure of 1 bar is 2.2 l, and at a nominal pressure of 7 bar - 3.4 l. Mechanical control of flow and heating is carried out by simply turning the water supply tap. And the built-in flow limiter allows you to automatically adjust the water flow, which affects fluctuations in the heating temperature. This model is manufactured at the company's factory in China and received a 24-month branded warranty.

Wall-mounted instantaneous electric water heater Hotpoint-Ariston AURES SLIM MULTI SM 7.7 compares favorably with its counterparts in appearance. Despite the relatively large dimensions of 18x30x10 cm, the premium Italian design with lower pipes hidden in the body and a two-color front control panel gives the model a certain charm. The device is equipped with 2 "wet" heating elements with a power of 3.3 kW and 4.4 kW, which determine the possibility of 3-stage heating, and a thermostat with double protection against burns. The water heater can operate in Low mode with the first heater on, in Med mode with the second one, and in High maximum heating mode with both heaters on. At the same time, the maximum capacity of hot water preparation at a peak power of 7.7 kW is 4.4 l/min at ∆t=25 °C. The heating power is set using the rotary knob on the front panel.

High performance and heating power make it possible to use several points of consumption for hot water supply. The device turns on automatically when the water supply tap is opened, and the flow heating system is activated at a minimum flow rate of 2.1 l / min. The device is designed for horizontal installation with a bottom connection to a water supply system with an operating pressure of 0.5 to 8 bar. The high value of the operating current of 36 A requires electrical connection to at least a 40-ampere single-phase meter with a power cable with a cross section of at least 6 mm2. The device has a built-in overheating protection, and the device comes with a safety valve that turns off the water heater at excessive pressure, and a coarse water filter that removes dirt inclusions.

The hydraulically controlled instantaneous electric heater Clage MBH 6 is produced by a German manufacturer of energy-saving hot water technology in Lüneburg in Lower Saxony. The quality of the European assembly could not but affect the price of the device - it costs about twice as much as its "relatives" from China. Designed to be installed under a sink or kitchen sink, the device is compatible with all conventional faucet types and serves as a standard installation solution for all domestic water systems. The model is resistant to high water pressure (10 bar) and is designed for vertical installation. For ease of connection, a tee, a flexible connection hose (50 cm) and 2 types of aerators (flow regulators) for mixers are supplied with the device. Please note that the connecting threads of the nozzles located on the top are 3/8 inch.

As a heating element, the device uses an economical (class A) single-stage spiral heating element with a power of 5.7 kW, which is resistant to scale formation. Heating is regulated mechanically by changing the flow, and switching on and off works automatically along with opening / closing the water supply tap. The flow sensor is triggered at a minimum flow rate of 2.2 l/min, and the maximum output at 25 °C (∆t) water heating is 3.3 l/min. An adjusting screw is placed on the body of the device near the nozzles, which allows you to optimize the flow rate, which determines a comfortable temperature at the outlet of the tap. A mesh filter is installed on the inlet pipe, which must be periodically cleaned of accumulated dirt that prevents the movement of water. The water heater fully complies with EU regulations and standards, and the factory warranty for it is 3 years.