Water use and heating

Although there seems to be a lot of water on Earth, less than one percent of it is available to practically use for human life. The rest is salt water or fresh water frozen in the polar regions, or water that cannot be used for food and other processes. In addition, the population and demand for freshwater resources are increasing, while the supply remains constant. It is up to us to reflect on our daily actions and use our resources wisely, appreciating their importance in our lives and taking care of our environment for a greener future. In this section, we will provide tips on selecting a water heater, using it efficiently and options for reducing your overall water consumption by using energy wisely.

Lieto un sildi ūdeni efektīvi.jpg

What should I consider when choosing a water heater?

Pamatā ir divu veidu elektriskie ūdens sildītāji – tilpuma ūdens sildītāji jeb boileri un caurplūdes ūdens sildītāji. Būtiskākā atšķirība ir darbības princips – tilpuma ūdens sildītāji izvēlēto ūdens tilpumu uzsilda līdz iestatītajai temperatūrai un uzglabā termosa tipa tvertnē, savukārt caurplūdes ūdens sildītājs ūdeni silda tikai tā izmantošanas laikā.

There are basically two types of electric water heaters – volumetric water heaters or boilers, and instantaneous water heaters. The main difference between the two is their principle of operation: volumetric water heaters heat a selected volume of water to a set temperature and store it in a thermos-type tank, while instantaneous water heaters only heat the water during use.

Electric volumetric water heaters fall into three sub-categories – vertical, horizontal and combined. A vertical water heater (easier to maintain) only differs from a horizontal water heater in terms of positioning, while combined electric water heaters can be connected to the heating system of your home. instantaneous heaters have a filter that should preferably be replaced once every three months.

Instantaneous water heater

Volume water heater

Combined water heater (solid fuel/electricity)


  • There is no heat loss, because the water is only heated at the moment it is used.
  • Higher levels of comfort.
  • Instantly warms the water that is flowing through it – Compact size.
  • An unlimited amount of water can be heated.


  • High electrical power, 15 kW on average.
  • A three-phase connection, as well as an input protection device current of at least 25 A are required.
  • The required water pressure – at least 2.5 atmospheres.


  • Low electrical power, 2 kW on average.
  • Water pressure is not essential.


  • Heat loss, because the hot water temperature is maintained continuously.
  • Lower levels of comfort.
  • Larger size.
  • Longer water heating time (1–8 h depending on volume).
  • Regular maintenance is required.


  • Water is heated faster if solid fuels (wood, briquettes, pellets) are used, in contrast to electricity.
  • Can supply large volumes of hot water continuously.


  • Relatively, it takes up a lot of space. Before you buy one, you need to arrange for the space where it will be installed at your home.
  • Installation is fairly complicated – the heating appliance is connected to the flue pipe, and the water supply pipes are connected to it.
  • Fossil fuels are used, which produce CO2 emissions, while the use of electricity produces no emissions.

What volume to choose?

The volume of the boiler should be selected according to the number of people in the family, the frequency of water use and the habits of the family members. Recommended water heater capacity depending on the number of people in the household:

boileris.png1 person→ 30-70 litres

2 people→ 80-150 litres

4 people→ 100-250 litres

5 or more people → up to 300 litres

If one member of the family showers in the morning and the other in the evening, a water heater of smaller volume will be sufficient.

Pay attention to the power of the water heater as well – the more powerful and larger the water heating device, the more electricity it will consume to heat water.

Jaunākās paaudzes ūdens sildītāji

One of the undeniable advantages of the latest generation of heaters is the so-called smart function. It will continuously analyse your hot water consumption habits, and develop as efficient a water heating schedule as possible. This function also enables the remote adjustment of the heating temperature of the boiler via the mobile application of the service provider.

An air-to-water heat pump can also be bought. This will supply your home with both hot water and heat. By choosing to add air conditioning to the features of your pump, you will receive an energy efficient and advanced wide range climate control device elektrumveikals.lv.

Recommendations for maintaining a water heater

  • The water heater should be placed as close as possible to the place of water use.
  • The water heating temperature should be set between +55 °C and +59 °C. When exceeding this temperature, limestone begins to be released more actively, thus the heating element of the water heater becomes built up with limescale more quickly and its electricity consumption increases.
  • At least once a year, the water heater must be serviced, during which the heating element is cleaned, the inside of the heater is thoroughly rinsed, and the condition of the anode is assessed. If the anode is broken, it must be replaced. Otherwise, the heating element will scale more quickly, increasing the water heater’s electricity consumption.
  • Before cleaning, the volume water heater must be disconnected from the electricity and water supply.
  • If you have the required skills, you can perform maintenance of your water heater yourself; if not – entrusting this task to a professional is the best option, as there is a risk of scalding yourself with hot water or flooding the neighbour’s apartment.
  • Instantaneous water heaters do not require regular maintenance – if safety requirements and the basic rules for the use of the device are complied with, these water heaters will perform perfectly for a very long time.

Efficiency of water use

We invite you to appreciate the importance of water in your daily life and have prepared practical tips on how to use water efficiently in your daily life while being aware of the fact that water is a natural asset that we all need to share.

Recommendations for reducing water consumption


  • Install a water-saving aerator nozzle on your taps to mix water with air, thus reducing water consumption by 50%. It should be remembered that there are taps that already have a built-in aerator. How to check this? Open the tap and look at the water flow. If it is clear, the tap most probably doesn’t have an aerator, but if the water is frothy or bubbly, the tap has an aerator.
  • Close the tap when brushing your teeth or shaving and you will save up to 10 litres of water!
  • Give preference to showering instead of bathing. Showers require an average of 25–50 litres of water per wash, while baths require at least 100 litres.
  • Reduce the time spent in the shower, asthis will save up to 10 litres of water per minute (if you are using a shower tap with an aerator, which is indicated by the water flow – it is foamy and bubbly because the aerator mixes water with air).
  • Clean the shower system and mirrors regularly – this will result in lower water consumption compared to cleaning dirt that has already settled.
  • Choose shorter washing programmes and lower washing temperatures, which will result in the lower consumption of water, as well as electricity. For lightly soiled cotton clothing, a temperature of 30 °C – 40 °C is sufficient. However, do not forget to check the manufacturer’s instructions on the garment label before washing your clothes. It is recommended to wash bed linen and towels at a temperature of 60 °C to kill any living organisms in them, such as dust mites.
  • Only use the pre-wash function or soaking for extremely dirty clothes.
  • Always close taps and shower taps tightly – dripping taps can result in wasting up to 90 litres of water per day.


  • When cooking or boiling water in an electric kettle, only pour in as much water as you need. Do not fill it up; this will save both water and electricity.
  • Wash vegetables and fruit in a closed sink or a bowl without the use of running water. Furthermore, what is left afterwards can be used to water your houseplants.
  • Consider buying a dishwasher if you don’t already have one in your household. A dishwasher uses low-temperature water, consuming much less (6–12 l) water in contrast to washing your dishes by hand (50 l); the dishes are steamed at the end of the cycle, thus reducing the energy needed to heat the water and leaving more time to dedicate to yourself and your family.


  • If possible, choose a toilet bowl with two flushing modes. Economy mode uses 2/4 l of water, while the standard mode uses 6 l.
  • Choose environmentally friendly, eco-friendly cleaning agents. It is important to note that strong chemical cleaning agents destroy not only the bacteria in the toilet bowl but also the good bacteria in the sewage treatment plant.
  • Only dispose of toilet paper in the toilet bowl if it is designed for this purpose. Do not use the toilet bowl to dispose of food scraps, coffee grounds and various other waste that is not meant to be flushed down the drain.

Choice of plumbing equipment


If you need to buy a new water tap, choose an energy-efficient tap with reduced water flow (eco flow). Modern taps incorporate various mechanisms for reducing water consumption; for instance, the hot water saving function – the handle always returns to the default position, so that when you open the water supply, lukewarm (or completely cold) water flows initially, which is not immediately hot, thus preventing the consumption of additional energy from increased water temperature when the water supply is reopened.

Water saving function – by locking the handle in a specific maximum position, it is also possible to set the maximum water flow per minute that flows through the tap, etc.

Energy-efficient taps can use as little as 5 litres per minute, while a standard tap’s flow rate averages 10–12 litres per minute. There are also water faucets with an eco-button, which, depending on the model of tap, reduces the water flow by 10–40%.

Meanwhile, thermostatic taps help obtain the required water temperature immediately, without wasting water unnecessarily – a constant water temperature is always maintained, taking into consideration the fluctuations in the temperature of the incoming cold and hot water. Thus, it is possible to set 17 °C instead of the standard 22–24 °C.

For some time now, various models of non-contact taps have been available on the market, which were developed by sanitary ware manufacturers to keep up with the development of technology and global trends. These taps work with the help of built-in sensors – to start the water flow, you only need to bring your hands closer to the spout of the tap. As soon as your hands are moved away, the water supply is automatically cut off, so you will never forget to turn off the water.

It is also possible to improve an already installed water faucet by adding a special nozzle – an aerator. How does it work? When water flows at a certain speed along small openings in the system, a suction force is formed that adds air to the water, creating a strong, bubbling jet of water. Thus, water consumption can be reduced by up to 50%, since without the aerator, the water consumption averages at 10 to 12 litres per minute, while with the aerator it is 5 to 6 litres per minute respectively.

Currently, an increasing number of taps have a built-in aerator as a standard part of the mechanism. You can see this by the water jet – if the water doesn’t flow like a transparent stream, but is frothy and bubbling, the tap has an aerator function.

Toilet bowls

At home, large amounts of water are used in bathrooms and toilets for washing hands, cleaning, as well as in toilet flushing cisterns.

It is recommended to choose a toilet bowl with two water flushing modes or two water flushing buttons – one of them usually consumes twice as much water, so use it as needed without pressing the big button.

A special dispenser can also be installed in the toilet flush box to reduce the amount of water used each time you flush; for instance, the flush volume can be adjusted from 10 to 5 litres.

Additionally, in caring for the environment, we invite you to review the habits of toilet cleaners, and switch to more environmentally friendly solutions. It is important to note that strong chemical cleaning agents destroy not only the bacteria in the toilet bowl but also the good bacteria in the sewage treatment plant.


It is recommended to buy a shower head with a water flow reducer, as well as a tap with a built-in aerator because such a head sucks in three litres of air for one litre of water, which creates massaging water jets and enables easy rinsing. Using a standard shower tap, 15–20 litres of water can flow out per minute, while an efficient shower tap may only use 8 litres per minute.

Water losses occur while the user adjusts the desired temperature; therefore, when purchasing a new water tap, it is recommended to choose a tap with a thermostat that allows you to set and maintain the desired water temperature throughout the wash.

If possible, select and buy plumbing equipment with easy-care surfaces. For instance, it is advisable to select a shower head with silicone nozzles, which are easier to clean.

Have any additional questions? Ask here!