Best Tankless Water Heaters

The Noveen IWH160 electric heater for running water is perfect for a small kitchen, cottage, garage or garden workshop, where the need for hot water arises periodically.

The heart of the model is a 3500 W spiral heater, which allows you to quickly heat water to 60 °C (literally in 3 seconds after switching on). The elongated body of the water heater has a built-in single-lever mixer with precise marks for adjusting the water temperature. By turning the lever to the sides, you can get colder or warmer water.

Noveen IWH160 maintains the declared efficiency at a flow rate of up to 2.5 l/min. Moreover, hot water does not accumulate inside the boiler, but is immediately heated in the required volumes. In the absence of proper pressure, the water heater automatically switches off the spiral heater to avoid overheating and failure.

The model comes with a built-in power cord and a plug for plugging into a socket. The power supply of the "flow-through" is provided by traditional household electrical networks. However, for its safe operation, it will be necessary to install a sufficiently reliable socket that can withstand power up to 3600 W, and it is advisable to install a 16 A machine in the distribution electrical cabinet.

The Hotpoint-Ariston AURES SF 5.5 COM instantaneous water heater (the name AURES SLIM FLOW can also be found in online stores and equipment catalogs) is a budget solution from a well-known manufacturer, with which you can solve the problem of hot water in the kitchen or bathroom. The Ariston company, not without reason, praises the Italian design of this device, which really looks very aesthetic. Inside the elegant case there is a heating system of two tubular copper heating elements. One of them has a power of 2200 W, and the second - 3300 W (the total power of the water heater, therefore, is 5500 W). Two "knobs" on the front panel are used to control the operation of the device. One of them is used to adjust the water pressure and acts as a thermostat (when turning the handle to the left, the pressure increases, and the water temperature decreases, when turning to the right - vice versa). The second handle turns on the heating elements: the first, the second or both at the same time (the LEDs on the panel show which of the heating elements is currently on). If there is no water flowing through the water heater or the stream is too weak (at least 2 l/min flow is needed), the heating elements will not turn on (this is how overheating protection is implemented). By turning on both heating elements at the same time and turning the thermostat handle all the way to the right, you can achieve the maximum possible water temperature for this device - 55 °C.

The water heater is attached to the wall with four screws (the required size fasteners are included in the kit). It must be installed exclusively in a vertical position with the pipes facing down. The device can be easily connected to a standard water pipe with a 1/2″ thread. A tee with a tap and a shower head, which are included in the water heater kit, is screwed to the second pipe. However, there is no power cable in the kit. Due to the power of 5500 W, a separate electric cable (with a cross-section of at least 4 mm2) must be connected from the distribution board to the installation site of the flow heater. The line must be grounded and protected by a 25 A circuit breaker. Due to the fact that the Hotpoint-Ariston AURES SF 5.5 COM water heater body has a high degree of protection (IP25 class) against water and splashes, it can not only be suspended over a sink or bathtub, but also installed directly inside a shower cabin.

The compact and inexpensive Tesy IWH 35 X02 KI instantaneous electric water heater is designed to service one point of water intake. The device is a flat plastic case with a tap and handles for adjusting the supply of hot and cold water. Inside the case there is a heating coil that heats the water flowing through the "insides" of the device. The power of the heating element is 3500 W. When you open the tap marked in red, the device turns on automatically (and when you close it, it turns off automatically). The water temperature is adjusted exclusively by changing the strength of the stream in the "red" tap. When the flow increases, the temperature decreases, and when the stream decreases, it increases. With an average flow (2 l / min), the water heater has time to increase the temperature of the water flowing inside it by 25 ° C. If you only need cold water, use the "blue" tap. It is not connected to the heating element in any way and does not turn on the device.

This water heater is suitable only for non-pressure water supply systems. That is, when connecting to a centralized water supply, a pressure reducing reducer or valve for adjusting the pressure will need to be cut into the cold water supply line before the device. The water heater mixer is “put on” directly onto the cold water pipe protruding from the wall (it should have a standard size of 1/2″). Inside the water heater there is a coarse filter that traps small solid particles. It should be cleaned periodically. The body is attached to the wall with two screws and two dowels, for which holes must first be drilled. Given the power of 3500 W (like an electric kettle and an electric stove combined), the device plug can only be plugged into reliable sockets that can withstand a power of up to 16 A.

Electric heaters such as the Tesy IWH 35 X02 KI are ideal for installation above the kitchen sink or next to the washbasin in the garage, workshop or office toilet. Although you won’t get boiling water from this device, it can cover basic needs and provide warm water, allowing you to rinse your hands or wash dishes.

The compact Thermex Balance 4500 water heater is designed for use in pressure systems and can be used to instantly prepare hot water for several water draw-off points.

The flow-through boiler can be installed with the pipes either upward or downward. Thus, it can be placed both under the sink and above the washbasin. The water heater turns on automatically - the heating process starts when water flows in and stops if the taps are closed. The flow intensity is supposed to be regulated using a mixer.

Heating water by approximately 35 °C relative to the input parameters of the water carrier temperature, the boiler provides a capacity of about 1.8 l/min. At ∆t=25 °C, the model heats running water in a volume of up to 2.6 l/min. Thermex Balance 4500 uses a classic spiral heater, which is resistant to corrosion and scale formation.

The safety systems on board the model are represented by protection against overheating and accidental switching on without water. The water heater is connected to a single-phase household AC network with a standard voltage of 230 V. Its maximum power consumption is up to 4500 W, so it is advisable to have line protection with an automatic switch of at least 16 A.

Like other water heaters of the same brand, the Bosch Tronic TR 1000 4T instantaneous water heater has a very laconic design. It looks like a simple white parallelepiped of small size. But something interesting is hidden under the inconspicuous body - a heating system of an original design. It is arranged as follows: water flows through a copper tube twisted into a spiral. Between the turns of the spiral there is a copper heating element of exactly the same spiral shape. The tube and the heating element are connected to each other by soldering. Thus, the heating element gives off its heat to the tube, and the tube, in turn, heats the liquid. Such a design of the water heater ensures efficient water heating and gives reason to believe that the device will last a long time.

Water heaters of this series operate in a fully automatic mode thanks to sensors that register the speed of water movement through the "insides". The heating element turns on if the flow reaches a speed of 1.3 l/min, and turns off when the flow drops to 1 l/min. The standard productivity when heating tap water with a temperature of 12 °C to a comfortable 37 °C is 1.8 l/min. The device's protection systems consist of a temperature limiter that will not allow the water heater to overheat and burn out, and a moisture-proof body (class IP24D), which does not allow splashes to get on the electrical components even if the device is doused with water.

The Bosch Tronic TR 1000 4T water heater has upward-facing pipes, so it is best installed under a kitchen sink or under a bathroom sink. The compact dimensions of the body (250x144x100 mm) make it easy to hide the device in a cabinet. The delivery set includes a mounting template, a set of fasteners (two dowels and two screws), as well as a wire with a plug and an aerator nozzle, which must be put on the tap to reduce water consumption. The water heater should be connected to a grounded electrical network protected by a 25 A machine. Difficulties may arise only when connecting to a cold water pipe. Although this heater can be connected to a pressure water supply, you may need to buy a special fitting for this. The fact is that the device's pipes have a size of 3/8 ", and the water pipes in your home most likely correspond to the size of 1/2".