How to Choose The Right Water Heater

The first rule of choosing a water heater is to determine your needs, and as a result, pick up the volume of cumulative or power of the flowing water heater. Determine the place of installation: under the sink, over the sink, on the wall, or the floor. Determine the type of installation: horizontally or vertically. Depending on this, choose the appropriate model. Learn more about making the right choice and not letting the family down in our article below.

It is unpleasant to be without hot water no matter where you live – in the capital, small town, or village. Very often, without this benefit of civilization, are those who have a centralized water supply: utilities are in no hurry with preventive repairs, forcing people to heat water in basins and kettles from a few weeks to a whole month. Some houses remain without hot water supply for years – equipment in water heater rooms worn out or has long “decorated” someone’s country residences, and the city does not have new money.

Many consumers complain that hot water throughout the house was turned off “for the company” with non-payers, someone does not want to bathe children in cold water, while neighbors make major repairs, someone GorGaz was forbidden to use a gas column or water heater because they are not legalized, or their use is prohibited.

There are many reasons to stay without hot water. The consequences of this are literally the most acute for the elderly, the elderly, the people whose opportunities are limited, and the families with children. What to do? Install an autonomous water heating system, independent of the vagaries of utilities or the problems of neighbors? But gas water heating equipment is not profitable – you will need to go through “7 circles of hell” and get a lot of permits; besides, it can be installed not everywhere, it is unsafe, and the gas is constantly becoming more expensive. Electric ed prose heaters for the average apartment are not suitable – they are designed exclusively for very powerful wiring (up to 20 kW!).

The most profitable solution is to choose a water heater – a cumulative electric water heater, consuming only 1-2.5 kW of electricity. The water heater can provide water heated to 60-75 degrees Celsius, both in a small apartment and a large private house, about choosing a water heater and what parameters to consider next.


Buying Guide for Water Heaters

Water heater size

The most important parameter of a cumulative water heater is its volume (capacity). Below we will tell you how to choose a water heater for the optimal solution to certain problems:

water heaters for 10-15 liters are ideal for washing hands and dishes, so often mounted in small bathrooms and kitchens above the wash or under it. When choosing such a water heater, pay attention to the location of water pipes – it happens to be lower or upper.

If you’re looking for a water heater for the top kitchen cupboard, choose Atlantic O’PRO PC 10 RB (10 liters) and O’PRO PC 15 R (15 liters). Their depth and bracket are only 262 mm, so such water heaters are easily placed in a standard 300 mm kitchen cabinet. Also, for your purposes, the designer 10-liter water heater Atlantic Ondeo SWH 10 AM has a depth of 281 mm.

  • Water heaters for 30 liters – the best “soul” option for a bachelor or a small apartment with one tenant.
  • Water heaters for 50, 75, or 80 liters will allow you to take a shower and serve hot water in the kitchen. They take up a bit of space and will be able to provide hot water to the couple.
  • 100-liter water heaters are the most popular and versatile choice for families with children living in a city apartment. Such water heaters are suitable for a set of bathrooms, work on a couple of water points, and shower reception.
  • 150-liter water heaters are designed for large families and people who prefer to take a bath regularly.
  • Water heaters for 200-300 liters are optimal for large apartments, houses, and families of 5-8 people; they are designed for a network of 220/380 V. Consider that such water heaters are heated for a long time (up to 4.75-5.75 hours!) and weigh a lot, so set only on the floor. It is most profitable to use them in dwellings with a two-tariff meter installed.

When selecting the volume of the water heater, do not look at the water heater “with stock.” The water heater is larger than necessary; the volume will take up more space and be heated longer (the 50-liter water heater is heated by 1.5-2.5 hours faster than the 100-liter model!), creating discomfort. Besides, if hot water is needed in the kitchen and for the shower, sometimes it is more profitable to buy two water heaters (volume and compact models) – thus, the waiting time for new heating will be reduced.


Water heater, by the way, is it installed?

There are three types of water heaters on sale:

  • Only for vertical installation.
  • Only for horizontal installation, for example, Atlantic O’Pro Horizontal.
  • With the possibility of both vertical and horizontal installation – universal models.


Influences the location of the water heater?

First of all, the way the water heater is installed affects the convenience because it is horizontally suspended under the ceiling; it will not “steal” useful space and not interfere with the elbows in a small bathroom or bathroom. You can install such a water heater over the toilet.

Secondly, some water heaters in a horizontal position heat the water much faster than in a vertical position. For example, 100-liter Atlantic Steatite Cube VM 100 S4CM rectangular water heaters, horizontally installed, are heated faster by 0.5-1.4 hours! Such a water heater simultaneously provides significant savings in electricity and increases comfort for a large family.


water heater based on its shape

Cumulative water heaters are cylindrical, rectangular, and cylindrical with a reduced body diameter (Slim water heaters). Choosing a water heater in form is quite common, but what does it affect, and is it worth overpaying for it?

  • The easiest to manufacture – cylindrical water heaters, so the cost they have the most affordable. The choice of models in such a case is extensive, and finding a water heater with functions to your liking will allow every buyer.
  • So-called Slim water heaters take up less space and look easier. Of course, because their diameter is reduced by 10 centimeters! Because the area of contact of cold and heated water is also reduced, slim-aggregates heat up a little faster.
  • Rectangular water heaters are high-tech, better fit into niches and have a thicker layer of insulation, so it is better to retain heat and save electricity. For example, the daily thermal loss of Atlantic Steatite Cube rectangular water heaters is 30-45% lower than that of the brand’s cylindrical models.

Is it worth overpaying for the hull’s shape to save electricity, space, and aesthetic beauty? It’s up to you!


Tank material: enameled steel or stainless steel?

Choosing water heater tank material can put an inexperienced buyer at a standstill. Let’s figure out how to choose a water heater based on the material of his tank? Besides, is it worth overpaying for water heaters with a stainless tank because their cost can significantly exceed the price of models with enameled tanks?

To make the water tank resistant to rust and not leak over time, two solutions are used in the manufacture of water heaters: stainless steel or the application of a protective coating on carbon steel.

Stainless steel contains chromium, an element responsible for the material’s corrosion resistance. It would seem that stainless steel tanks should not flow, but in practice, it goes differently: it is not uncommon when they occur in the first year of operation. The fact is that it is impossible to make a water tank without the use of welding, and at high temperatures in the seam area, stainless steel chromium particles evaporate. Between depleted metal particles under the influence of moisture, there is intercrystally corrosion, which eventually leads to leaks of stainless tanks.

In steel tanks with an enamel coating, the enamel is responsible for corrosion resistance. The thicker the steel and the layer of enamel, and the better the composition of the protective coating, the longer the tank will live. The enamel must be strong. At the same time, it should expand with the tank when it is heated and narrow when it cools down – only in this case, and it will be possible to avoid cracking it. To do this, the enamel must be applied in an even layer and have a special composition. To date, the best way to meet both of these conditions is considered to be electrostatic powder application of enamel followed by roasting (850 degrees Celsius), used in the manufacture of Atlantic water heaters. This method is costly and requires the availability of complex equipment. Still, the tank with such protection serves as much as a stainless analog, and the warranty on it can reach 8 years, while the warranty on stainless tanks rarely exceeds 5 years!

When choosing the material of the tank, look at the manufacturer’s warranty, and choose an option with a large warranty period. The water tank is the most important part of the water heater, and if it flows, you will have to buy a new water heater.

How to choose a water heater that will last even longer? There should be a magnesium anode inside the water heater, a consumable that protects the tank from corrosion. If the anode is not designed, it is better to choose another water heater.


How do I choose a water heater by the type of heating element?

You can find options in stores selling water heaters: “wet” TEN and “dry” TEN. What does this mean, and why are models with “dry” TEN more expensive?

“Wet” TEN on the form and principle of work is similar to a water heater – inside the tank in the water submerged tubular heater made of copper. Like the water heater, over time, it becomes a layer of scum. Water heaters with such a heater are strongly not recommended for hard mineralized water; otherwise, over time, TEN will warm worse, increase electricity consumption, and, in the end, will burn out. Moreover, the “wet” heater reacts chemically with the tank’s walls, forming a galvanic vapor. As a result, the tank becomes prone to electrochemical corrosion.

To reduce the effect of electrochemical corrosion, Atlantic water heaters have O’Pro’s proprietary protection (the installation of ohmic resistance), which significantly slows down the corrosion of the tank and the consumption of magnesium anode. Other manufacturers have no analogs of such protection.

“Dry” TEN does not come into contact with water – it is installed in a protective casing or flannel, fixed on the flank of the unit. As a result, water heaters with such a heater can be used even with hard water without deteriorating work overtime.

Atlantic Steatite water heaters use a unique ceramic “dry” TEN, made using “Steatite” technology. Compared to the rod “dry” heaters of other brands, this heater gives more heat, works silently, can have two modes of power, and cool down for a long time, saving electricity.

Besides, the “dry” heater inside the tank is located at an angle, which allows you to install water heaters horizontally without reducing their performance.

When choosing a water heater, please note that models with multiple heaters or a two-mode power plant will be able to provide faster water heating, spending half as much time!

Thanks to eliminating electrochemical corrosion, water heaters with “dry” TAN last much longer, have a guarantee of up to 7-8 years, and can be serviced not once a year but once every two years (only Atlantic steatite water heaters). If we consider the fact that they save electricity, we think the question of how to choose a water heater by the type of its RNA got my answer!


Control type and electric water heater filling

Approaching the question of how to choose a water heater by the type of its management, keep in mind: the management of cumulative water heaters can be mechanical – turning regulator or electronic.

  • If you do not trust modern technology, want to buy the easiest to manage and maintain water heater, do not want to overpay, or know that the voltage in your area’s network is unstable – choose water heaters with mechanical control.
  • Electronically controlled models can be programmed, self-learning (remembering your preferences and adjusting your temperature automatically), and operating in a mode that saves energy. They are protected from freezing and can emphasize the owner’s wealth. Such water heaters are a choice for the modern user.

Also note: in addition to the control unit, other elements of the electric part of the water heater are TEN, magnesium anode, it needs periodic replacement, and a thermostat, which should have protection from overheating. The most economical water heaters – with capillary and electronic thermostat.


How to choose a water heater: trim and warranty issues

If you are looking for a storage water heater for an apartment or house powered by a 220B network, you will definitely need an electrical wire with a fork and a safety valve.

The valve serves to prevent leaks and tank explosion due to too much pressure inside. Keep in mind: water heaters connected without a safety valve are not covered by the warranty!

Separately, you will have to buy fasteners, insulating sleeves (protection from wandering currents), pipes, a filter of rough cleaning, taps, and fittings for the water supply. If the pressure at the entrance to the apartment exceeds 5 bar, it is mandatory to buy a water pressure reducer for the water heater.

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I am tech writer who is passionate about technology and spearheads the core writing team on tech news

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