What is a dry heating element in the water heater: its advantages and disadvantages.

Many, choosing a water heater, faced with the concept of "dry" heater. Similar models of water heaters have spread quickly and gained the trust of customers. Install them in villas, country houses, where there is no central heating.

The main differences from the wet dry PETN

Previously installed heaters with wet Tan, the device looks more like an ordinary boiler, only very large. It consists of a hollow tube, inside which a spiral. The remaining space was filled with quartz sand or any other material with good thermal conductivity. All this is put in a huge tank where there is contact with water and it is heated. Disadvantages: Due to the increased formation of scale increases energy consumption and reduced heat transfer.

Dry heater works fundamentally different: its base - a rheostat wire, which is placed in a ceramic insulator. not in contact with water, because the product is in the closed cones which, among other things, has the anti-corrosion treatment. To improve heat conduction are placed between the walls of the oil layer.

REFERENCE! Because of the design features - dry PETN heating element is always a straight line, they are equipped with only a tank volume of 50 liters.

Advantages and disadvantages of dry PETN

The main advantages of this type of heater include:

1. Lack of scale. It is a modern heating device, wherein the heating element is reliably protected walled closed flask and further processed anticorrosive solution. Because of this, there is no contact with hard water and, consequently, the formation of scale.
2. The water heats up quickly. Since the water-heating boiler element has no direct contact with water and it is not subjected to harmful, the device operation goes smoothly, efficiently, with equal intervals.
3. Reliable thermal protection. the new generation of boilers are equipped with a reliable thermal protection, thanks to her, there is no heating unit without water inside. If the unit fails, the failure will only own heater, and not the entire water heater.
4. Easy to maintain. Replacement of parts in the device can be made independently, without the need for expensive repairs. The heating element is changing quickly and without too much difficulty. It is advisable to take preventive maintenance from the masters in the service center once every two or three years, it saves money.
5. The dimensions of the boiler. Such devices have small dimensions and volume as compared to the heaters with wet Tan, also endowed with an interesting design, which gives them an attractive appearance. Also have a higher water capacity than previous similar models.
6. Exclude the possibility of air pockets. These models are designed so that air ingestion is eliminated, accordingly, the occurrence of congestion is also impossible. This greatly extends the service life of the heater to dry and Taine saves money its owner.

Deficiencies in these water heaters a little, but nevertheless they exist:

1. Uneconomical operation. First, the machine heats metal tube, and then the water. But this disadvantage is not always justified, as the heat goes deep inside and indirect heating of water is minimal Heat losses to the same diameter dry PETN (10-12 mm) smaller than the diameter of the metal pipe only for a couple of millimeters. From this we can confidently say that the air gap between the walls is too small to significantly lose heat when heated.
2. It is believed that the heater power with dry TAN less than similar wet Tan. In the second representative heaters really spiral power 2000 W, while the apparatus with dry Tan only 1200 watts. But the dry heat in the heater elements are usually put two, so the power is already obtained 2400 watts.
3. Cost. It is higher than that of the models with a different type of heating element, but as the merits of heaters to dry Tan much more, it can be considered to be justified.

Choosing the heating apparatus into the house, it is better to stay on the machine with a dry Tan. Problems with it will not be enough, and it will last for years to come.