How to choose a water heater or boiler?

Опубликовано: 28 Август 2026
на канале: Heat-gaz center LUSHEV
263,528
2.6k

Learn everything you need to know about water heaters in 5 minutes.
We'll explain how to choose the right volume, power, shape, and even the type of heating element.

1. The first factor is volume. One person uses about 20 liters of water from a water heater for a shower. Washing dishes requires 10 liters. Based on this, we can calculate each specific case. For two people living in an apartment, we recommend a tank capacity of at least 50 liters, and preferably 80 liters. For three people, choose at least 80 liters, and ideally 100 liters.

2. The second factor is power. This determines the time it takes to heat the water in the tank. Higher power means faster heating. The power of domestic water heaters ranges from 1.5 to 3 kilowatts. This is approximately a 30-60 minute difference in heating speed. However, this is an important consideration depending on the installation location of the water heater, especially in an apartment building with old wiring. Older water heaters aren't designed to handle an additional 2-3 kilowatts of load. In that case, it's better to sacrifice water heating speed and choose a lower-power boiler, or one with a smart heating system.

3. Another important parameter is the heating element. It can be either closed or open. More commonly, it's called a dry or wet heating element.

A wet heating element quickly forms scale. This reduces its efficiency, requiring maintenance.

With a dry heating element, things are different. It's the same copper heater, but it's housed in a special enamel-coated flask, doesn't come into contact with the water, and the heating element is virtually free of scale. This type of water heater is more expensive, but it's less prone to repairs and breakdowns.

4. Boiler controls also come in two types: mechanical and electronic. The first option is the simplest and most durable. However, it doesn't allow you to fully control the water heating—it only allows you to roughly set the desired heating level. Electronically controlled water heaters are a different story. You can set the temperature down to the degree. The volume of heated water is clearly displayed, and there are even various smart modes. These allow the device to analyze the time of day when water consumption is highest and heat the water precisely for those times.

A brief overview of the manufacturers: We've compiled our own ranking of proven electric water heaters from Ukrainian and international manufacturers.

Let's start with the most affordable – "ZEUS." This Ukrainian manufacturer has the lowest price on the market. This company's models are available in tank capacities of 50, 80, and 100 liters. They come with both dry and wet heating elements, as well as mechanical and electronic controls.

https://lushev.ua/bojlery-jelektriche...
The next brand is "ELDOM." This is a Bulgarian manufacturer in the mid-price range. They offer the best value for money. This manufacturer offers a wide range of capacities, from 10 liters to 200 liters, models with dry and wet heating elements, electronic and mechanical controls, and a design to suit every taste. Eldom offers a wide selection of models, including indirect, combination, and instantaneous water heaters. Advantages include an anti-corrosion zirconium enamel coating and thermal insulation thickness of over 3 cm.

ELDOM water heaters meet European standards.
https://lushev.ua/bojlery-jelektriche...
GORENJE (Gorenje) is a Serbian manufacturer. It has been well-known for a long time and needs no introduction. This manufacturer's product range includes water heaters with dry and wet heating elements, with mechanical and electronic controls. Some boilers feature a SMART mode and are available in classic and flat designs. We also highlight the EcoSmart system, which automatically adapts water heating to the user's needs, allowing for energy savings of up to 25% per year. The "Anti-Legionella" function cleans the tank of microorganisms.
https://lushev.ua/bojlery-jelektriche...
Electric water heaters from the Italian manufacturer Ariston are classic European boilers with high functionality, design, and original components.

Ariston water heaters are available in various price segments, from budget options with a wet heating element to exclusive designer models with flat tanks. Smart features and energy-efficient operation are guaranteed by the manufacturer.
https://lushev.ua/bojlery-jelektriche...
Order any water heater with delivery from our online store at https://lushev.ua/vodonagrevateli/
Order Processing Department: (048) 700-00-35, (050) 515-33-46
We deliver throughout Ukraine!
Our stores in Odessa:

Planeta Business Center, 120/1 Balkovskaya Street
Viber (048)771-25-14
Malinovsky Rynok, Store No. K-26A,
Tue-Sun 9:00 AM to 4:00 PM
(048)737-59-69
Starokonny Shopping Center, Store No. DP-91
Mon-Sat 8:00 AM to 4:00 PM
(048) 743-94-93
Starokonny Shopping Center, Store No. DP-49
(048) 788-04-64
Tue-Sun 8:00 AM to 4:00 PM
...