The hot water supply of a private house

The hot water supply of a private house

February 19, 2021 Off By Rob Prosser

The hot water supply of a private house is an important engineering system, the arrangement of which always remains an urgent issue. This is a necessary condition in order to fill the house with coziness and make it comfortable for living. 

The installation of modern water heaters successfully solves the problems of hot water supply and heating in a private house, and for this, it is no longer necessary to have powerful electrical wiring, gas, or chimney. All you need is to familiarize yourself with the principles of operation of various systems, choose a suitable scheme, and, if desired, you can carry out the installation yourself.

Where does the hot water supply of a private house begin?

Before proceeding with the installation of hot water supply in a private house, it is necessary to determine some of the parameters of this system.

First of all, you need to figure out what kind of plumbing you will use, in what quantity, and where you will place the equipment. As a rule, this is a sink, bath, shower, washbasin, jacuzzi, bidet, etc.

After you have decided where you will place the plumbing, you need to allocate space in a private house for installing water heating equipment. For this, it is necessary to take into account the technical capabilities of the device. Experts recommend placing it at the same distance from hot water consumers.

Then pipes and all related fittings are already selected. As a rule, pipes with a diameter of 15 or 20 mm are suitable for internal wiring. For these purposes, galvanized or non-galvanized pipes are used, as well as products made of metal-plastic, polyethylene or polypropylene. The most popular are polypropylene pipes. You will need a certain number of fittings, couplings and other elements that must be purchased in the required quantity in accordance with the layout of the hot water supply system of a private house.

Next, you should choose equipment for preparing hot water.

Today, there are a large number of companies that will promptly help solve the problem of providing hot water to a private house, as well as provide the equipment necessary for water purification. These procedures are mandatory, since in private houses, as a rule, wells, artesian wells, etc., serve as water sources, and the water in them, as a rule, has a composition that is far from ideal. Therefore, such water cannot be used not only for cooking but also in hot water supply systems. This is due to the fact that it contains salts of calcium, magnesium, and other elements, due to which the water becomes harder.

What should be considered when organizing hot water supply for a private house

As a rule, the installation of any water heater in a private house is carried out by a professional, since for this it is necessary to prepare a suitable scheme, obtain permission, and also install ventilation or a chimney, if the need arises.

If you use plastic pipes, the installation process is greatly simplified due to their durability and strength, moreover, these products do not require the use of a welding machine. You should purchase fittings, silicone, tow, spare pipe and battery mounts. You also need a set of tools, consisting of a special soldering iron, scissors, puncher, screwdriver, level and hammer, several types of keys, pliers, metal scissors, etc.

The suspended boiler should be positioned at least 50 cm from the ceiling. Reliable fasteners are used for him and the radiators. When you equip the boiler room, it is recommended that the walls and floor be tiled with fire-resistant tiles and do not forget to provide free access to the water heater for periodic maintenance.

It is also necessary to install a chimney and ventilation system. You will also need a circulation pump, it is quite compact, capable of providing a constant pressure, as a result of which the water heats up quickly.

If you work with plastic pipes, you will need an assistant, since the connection is instantaneous and distortions must be avoided. Radiators are installed at the very last moment.

Make sure they are on the same level. The distance to the floor should be from 10 to 15 cm, from the wall – from 2 to 5 cm. By installing shut-off valves and temperature sensors, you can control the water temperature and shut it off if necessary.

Hot water supply of a private house: a circuit with an instantaneous water heater

A flow-through water heater can be represented:

  • geyser for hot water supply of a private house;
  • heating circuit for hot water supply of a private house from a double-circuit boiler;
  • electric flowing water heater;
  • a plastic heat exchanger connected to the heating circuit.

An instantaneous water heater in a private house starts heating water from the moment the hot water tap is opened.

All the energy that is spent on heating the water is transferred from the heater to the water instantly. To obtain water of the required temperature in a short period of time, the design of an instantaneous heater provides for limiting the water flow rate. The temperature is regulated by the amount of hot water flowing out from the tap.

For a sufficient supply of hot water to one horn in the shower, the power of the instantaneous water heater must be at least 10 kW. In order to fill the bath with hot water within a reasonable time, a heater power of more than 18 kW is required. If at this moment a hot water tap in the kitchen is opened in parallel, then for comfortable use of hot water it will be necessary to use a heater with a capacity of 28 kW or more.

In order to provide hot water supply for a private house of an economy class, a boiler of lower power is needed. Thus, the power of the double-circuit boiler is selected based on the needs for the consumption of hot water.

The hot water supply scheme using an instantaneous water heater is not able to provide economical and comfortable use of hot water in a private house for a number of reasons:

  1. The temperature and pressure of water in the pipes is determined by the value of the liquid flow rate. As a result, when you open another tap, the water temperature and pressure in the hot water supply system change dramatically. Therefore, using water in two places at the same time is extremely inconvenient.
  2. With a small consumption of hot water, the instantaneous water heater does not function at all, and in order to obtain water of the required temperature, it is necessary to increase the water consumption.
  3. Hot water supply is provided with a delay. At the same time, the waiting time depends on the length of the pipe laid from the water heater to the place where the water is drawn. A certain amount of water, when you just turn on the tap, you just have to drain into the sewer. This is the water that was already heated, but it managed to cool down.
  4. Scale accumulates rather quickly inside the heating chamber of the instantaneous water heater. If the water is very hard, you will need to descale the device frequently.

Thus, the operation of an instantaneous water heater in the hot water supply system of a private house provokes an unreasonable increase in water consumption and the volume of sewage effluents, an increase in electricity consumption for water heating, and also does not allow comfortable use of hot water in a private house.

At the same time, the hot water supply system of a private house using an instantaneous water heater is very popular among consumers, since it has a relatively low price and compact dimensions of the device.

This hot water supply system in a private house functions more efficiently if a separate instantaneous water heater is installed near the place for parsing the liquid.

In such a situation, it is advisable to install electric instantaneous water heaters. Nevertheless, this method will be quite energy-consuming (power will be required up to 30 kW). As a rule, the power grid of a private house is not designed for such loads, besides, the cost of electricity is quite high.