A summary table with the characteristics of the boilers makes it possible to quickly compare all five devices included in the selection. Other electric water heaters of similar capacity, which are now sold in online stores, can be found in the boiler catalog, which has about 1000 models.

Price, 7 year tank warranty.
No thermostat, no cable included.

Boiler Tiki Prime 80 V9 heats water using a copper "wet" heating element with a power of 2000 watts. The steel storage tank, enameled on the inside to protect the metal, holds 73 liters of liquid. A full tank of water heats up from 10°C to 65°C in 2 hours and 20 minutes. The boiler keeps heat well due to the fact that it has a fairly thick layer of thermal insulation (23 mm) made of polyurethane foam. Corrosion protection is provided by a magnesium anode.

The device looks like an almost perfectly regular cylindrical “barrel”. Small "decorations" on its surface are only a thermometer (it shows the water temperature very conditionally) and a red light (lights up when the heating element is turned on). There is nothing else outside the boiler. Not even a thermostat. The boiler is set at the factory to operate in one single "economy" mode, in which it always heats tap water to 65 ° C. To change the factory settings, you will have to remove the cover of the panel that covers the electrical part and climb to the thermostat with a screwdriver(but the manufacturer does not recommend doing this). You can turn off the boiler only by pulling the cord from the socket. The cord itself, by the way, is not included. Only a mounting plate for hanging the water heater on the wall is included with the appliance, and the power cable must be purchased separately.

Tiki boilers are a "budget" line of water heaters that are produced at the production facilities of Gorenje. They have only the basic "stuffing" necessary to perform their only function - heating water for domestic needs. But, despite the low price, the boilers of this brand have a very decent quality and a big guarantee for the tank (in this case - 7 years).

Dry heating element, 8 years warranty for the tank.
Not detected.

Water heater Atlantic Steatite VM 80 D400-2-BC looks like a regular household class electric boiler. In fact, despite some elegance (the French pedigree of the Atlantic company affects), nothing special is noticeable from the outside - a typical cylindrical boiler with a mechanical regulator and a round dial temperature indicator. And the characteristics are quite ordinary: power is 1500 W and water is heated to the maximum possible 65 ° C in 2 hours and 45 minutes. But a lot of interesting things are hidden under the snow-white glossy body. Immediately under the plastic shell is a layer of effective thermal insulation made of high-density polyurethane foam. It "envelops" a steel tank that holds 75 liters of liquid (quite enough to provide hot water to the average family). The tank is made of fairly thick steel (1.8 mm) and covered with enamel, which prevents direct metal contact with water, protecting the tank from corrosion.

The most remarkable details of the boiler are hidden inside the tank. There are a magnesium anode, which helps the water heater last longer, and a “dry” heating element. The dry heating element, developed and patented by Atlantic, is a steel flask, inside of which there is a set of several heating coils and a couple of dozens of steatite blocks. This design of the heating element provides faster water heating (even compared to conventional tubular "dry" elements, not to mention "wet" heating elements) and significantly reduces the possibility for the development of corrosion processes that destroy the boiler tank from the inside. A combination of three protective systems (enamel, anode and a “dry” heating element) plus other solutions (for example, a dielectric coupling on a hot water pipe) allow the manufacturer to give an 8-year warranty on the tank of this boiler (among Atlantic water heaters, only a few models have such a large warranty) and 2 years for the electrical part. It should be noted that warranty obligations remain only under the condition of regular and timely service maintenance. But the boiler can be cleaned not every year (like most other water heaters), but once every 2 years due to the fact that less scale is formed in the tanks of devices with “dry” heating elements. Therefore, Atlantic Steatite VM 80 D400-2-BC is particularly well suited for hard water regions.

Dry heating element (2 pcs), 7 years warranty for the tank, "smart" mode, anti-legionella function.
Non-obvious management of advanced settings.

With the help of two heating elements with a total power of 1800 W, the Hotpoint-Ariston BLU1 ECO 80V 1.8K PL DRY boiler heats 80 liters of water in 2 hours and 11 minutes. Such a heating rate and such a volume of the tank are considered sufficient so that a family of 2-4 people can safely wash dishes or take a shower, without limiting themselves in the consumption of hot water. Using the control panel, you can set the required liquid temperature in the range from 40 ° C to 80 ° C. Heating elements "dry". They do not come into direct contact with water. The use of the technology of "dry" heating elements in boilers makes it possible to slow down the development of electrochemical corrosion processes and significantly reduce the amount of scale inside the tank. Additional protection against corrosion is provided by the “proprietary” titanium enamel on the tank walls and an oversized magnesium anode. The manufacturer is confident in the effectiveness of these solutions, so he gives a 7-year warranty on the tank.

From below under a tank there is a control panel with touch buttons and signal light-emitting diodes. In addition to manual temperature control, it allows you to activate the T-MAX function (one-time heating of water up to 65 ° C and then return to the previous mode) or turn on the ECO EVO mode. In the smart ECO EVO mode, the boiler learns your hot water usage schedule and optimizes its operation in such a way as to reduce energy consumption. This function allows you to reduce electricity consumption by up to 14% (however, the final result depends on the life schedule and habits of a particular family). It should be noted that the buttons on the control panel do not have a tactile "response", which is why it is sometimes difficult to understand whether the button was pressed or not. In addition, the management of advanced settings is not entirely obvious. For example, to figure out how to turn off anti-legionella functions, you need to re-read the instructions from cover to cover.

Dry heater (2 pcs), 10 year tank warranty, smart mode, energy efficiency class B, frost protection, anti-legionella function.
Indistinct indication of water temperature, no operation indicator, no cable included.

Under the body of the Gorenje GBF 80 SMV9 boiler, made in the form of a classic white cylinder, there is a 76-liter tank. Between it and the body is a layer of finely dispersed polyurethane foam, which perfectly keeps heat. Looking inside the tank (for example, during cleaning, which is recommended to be done once a year), you can find an enamel coating on the inner walls of the tank, a magnesium anode and two tubes with "dry" heating elements. Each heating element has a power of 1000 W (thus, the total power of the boiler is 2000 W). Despite the fact that there are two heaters, there is no way to turn them on manually separately (only automation can do this, which will be discussed below).

A dark rectangle visually stands out on the front of the snow-white body - an electronic control unit (for those who prefer the "classic", a Gorenje GBF 80 UA boiler similar in characteristics is produced with a conventional mechanical wheel, which costs a little less). There are two physical buttons on the panel. One of them allows you to change the temperature settings with the help of repeated pressing. Focus on the icons indicating different modes: "palm" corresponds to a temperature of 35 ° C, the word Eco - economical 57 ° C, and wavy lines - the maximum possible 75 ° C. The second button activates "smart" mode. It works in this way: throughout the week, the device “monitors” your habits and remembers at what hours and in what volume you use hot water. Then he optimizes his work so as not to waste excess electricity. According to the manufacturer's measurements, this water heater saves about 17% when the "smart" mode is on (however, it should be noted that during the measurements "ideal" cases are considered, but in practice the savings are usually less). Due to "smart" automation, the Gorenje GBF 80 SMV9 boiler belongs to class B in terms of energy consumption (most water heaters of the same volume belong to class C - one step lower). The control panel also allows you to turn on the "anti-freeze" mode - the boiler will keep the water barely warm (about 10 ° C) so that it does not freeze. But the “anti-legionella” function (heating water for a couple of hours to a temperature of 70 ° C, in order to guarantee the destruction of harmful bacteria in the tank) works completely automatically, it is impossible to turn it off.

Talking about the electronic control panel (which, by the way, is used on many modern Gorenje boilers), one cannot ignore a few facts. Let's start with the pleasant: its LEDs are quite bright. If the heater is installed in the bathroom, you can safely go to the toilet at night without turning on the overhead light. Unpleasant features include an indistinct temperature indication. Since the same ladder of LEDs is used both to set the temperature and to display its current value, it is difficult to understand what exactly it shows when the user presses the buttons. In addition, many are unnerved by the lack of a heating indicator - it is not clear whether the device is currently heating water or not (after all, it works almost silently, and it is difficult to determine by sound). It should also be borne in mind that the Gorenje GBF 80 SMV9 boiler in online stores is usually sold without a power cable - you need to buy a wire of the required length yourself (with a cross section of at least 1.5 mm2) and connect it correctly to the terminals. However, these minor shortcomings are completely covered by the fact that a huge guarantee is given for the tank of this heater - as much as 10 years (and for the electrical part - 2 years). Such a long warranty period indicates that the manufacturer is firmly confident in the durability and reliability of its products.

Fast heating, dry heating element, 7 year tank warranty, smart mode, class B for energy efficiency, programmer, control via the Internet.
Price.

Boiler Tesy ModEco Cloud GCV 804724D C22 ECW has a fairly high power (2400 W). Therefore, it quickly heats water - in 1 hour 47 minutes, 82 liters of tap water are heated from 15 ° C to 60 ° C. The “dry” ceramic heating element is responsible for heating. Corrosion protection is provided by a magnesium anode and glass-ceramic coating applied to the internal surfaces of the tank. The steel parts of which the storage tank is made are interconnected using plasma welding. The manufacturer claims that the combination of these technologies provides increased reliability of welds and effective protection against corrosion processes inside the boiler. He is so confident in this that he gives a 7-year warranty on the tank.

The most interesting thing is not inside the tank, but under it - in the electronic control unit. The boiler is “stuffed” to the top with a variety of functions that allow you to customize the operation of the device and save energy. For example, a water heater has three “economical” operating modes at once, one of which is “smart”. In "smart" mode, the boiler learns your habits and consumption volumes in order to create the optimal water heating program. You can also program the heater to work at certain hours and days manually through the control panel with LED display. The “brains” of the boiler also have a Boost function (one-time heating of water up to 75 ° C without changing other settings) and a “vacation” mode (for a given number of days the device will not heat water at all so as not to waste electricity when you are away) . All of the above settings can be controlled even via the Internet. To do this, you need to configure the Wi-Fi module and install the tesyCloud application on your smartphone(there are versions for Android and iOS operating systems).

Due to the abundance of electronics and "smart" functions, the Tesy ModEco Cloud GCV 804724D C22 ECW boiler turned out to be a little expensive. But due to the ability to fine-tune and due to the energy efficiency of class B(very good by the standards of electric water heaters), throughout the entire life cycle, the device should “recapture” its cost due to reduced power consumption if you use the “economy” modes, rather than manual settings water temperature in the tank.