Electric convector SKZS20 euro (STIEBEL ELTRON)
With this remote control from NOBO, you can program the operation of all convector heaters installed in the house
Wall mounted convector panel NOIROT (Calidou series)
High convector series CNX2 from NOIROT
Stationary wall convector THS from
One of the advantages of convector panels is that they are compact and compatible with almost any interior. There are even options for decorating the panels themselves. True, it is better to entrust this work to specialists.
The main thing- do not clutter up the electric convector with furniture, which leads to a decrease in the efficiency of its work
As a result, the entire process of connecting the device takes a matter of seconds, and if necessary, the panels can be easily dismantled and moved to another room.
For the convenience of connecting the power supply, some convectors have a special connector
NOBO convector control unit
Skirting convector of the Elite series from
The choice of the main heating system of the cottageis not an easy task. Along with gas, liquid and solid fuel boilers, the operation of which requires the supply of gas communications or a constant supply of fuel, there are efficient electric heating systems. Owarm floors we described above. BUTnow we will talk about a system based on electric convectors that convert electrical energy into heat, which is transferred using natural air currents.
There are floor (movable) and wall (stationary) convectors. On the basis of the latter, you can quickly and without significant costs install a heating system in your home.
Any modern electric convector has a hollow rectangular metal body, which contributes to the formation of natural draft. ATthe lower part of the housing is equipped with a low-temperature heating element (TEH) with a lamellar radiator. ATduring operation, the panel gradually passes cold air coming from the lower inlets, and it flows around the heating element. The heated air flow rises and exits through the upper openings of the panel, distributing throughout the volume of the room. Thus, heat transfer is carried out with the help of natural air circulation, which in physics is called convection. Hence the name of the heater itself.
All electric convectors are equipped with a reliable security system and turn off if a foreign object gets on the heating element or there is an obstacle to the exit of hot air. It is also mandatory to provide protection against an abrupt increase in voltage.
Unlike traditional heating devices (say, electric fireplaces or oil radiators), convective wall modules do not heat up so much in operation: the temperature of the heating element usually does not exceed 100
However, all heating systems that use the principle of convection have a common significant drawback: they heat the room unevenly, especially in height. Warm air streams, having a lower density, accumulate under the ceiling, and the air temperature near the floor remains relatively low (this distinguishes convectors from warm floors). In addition, the circulating currents carry dust along with it, and over time it settles on the walls near the heaters in the form of dark stripes. Therefore, in the vast majority of convectors of the latest generation, the air grilles that let the heated air through are not located in the upper part of the panel, but on its front surface. Air deflecting louvers are located at a certain, calculated angle of inclination, due to which the air flow is directed not upwards, but into the central part of the room (vertically). ATas a result, warm and cold streams are mixed in the most optimal way, ensuring uniform heating of heated rooms, and the transferred dust does not settle on the walls. If the room is large, an additional fan is installed to speed up heating.
The most inexpensive convectors on our market are equipped with a heating element in the form of an open incandescent spiral. This significantly reduces the cost of devices (prices here range from $40 to $60, depending on the model), but limits their scope due to the lower protection class. For example, panels from EWT (Germany) with a spiral element are not recommended for installation in wet rooms. In addition, the coil has a rather high operating temperature (160
Most modern convector panels are equipped with a low-temperature heating element, which consists of a steel tube, where the filament is placed, and an aluminum diffuser (radiator), which provides more efficient heat transfer from the heater to the air. This is how the heating elements are arranged, for example, in convectors of the EVNA brand manufactured by VIKA INTERNATIONAL (Kazakhstan).Dnepropetrovsk, Europe). Moreover, the heating element itself consists of two heating rods, which allows you to turn on the heater either at full or at half power.
But since the coefficient of linear expansion during heating of aluminum is approximately twice that of steel, the steel heating element and the aluminum radiator expand differently: when heated, they rub against each other and wear out over time, and the heating process itself begins to be accompanied by characteristic crackling. Violation of the tight contact between the radiator and the heating element makes heat transfer difficult, which can result in local overheating and lead to the heating element burnout. BUTit’s close to a fire hazard.
When building an autonomous heating system of a private house from NOIROT convectors (models Memoprog and Eco6) a programmer cassette can be used as a control device. Completely ready for operation, it is simply inserted into a special socket of one of the convectors, next to the built-in control unit. Such a cassette is capable of driving, depending on the model, optimally nine, and maximum- even twenty heating modules. Another control option- Withcentral console. Some remotes can handle a very large number of modulesup to sixty. ATin both cases, control commands will be given either through a special cable, or directly through the supply wiring using a carrier frequency signal. But that’s not all. The command to turn on, turn off or change the mode can be received by phone!
The system controlled in this way allows you to set and automatically maintain an individual thermal regime in each room. The optimal heating modes are selected and programmed taking into account the real need for heat by hours of the day, by days, weeks and even longer periods of time. Thanks to this optimization, it is often possible to keep the average energy consumption at a level of only 30% of the nominal. Recall that the system consists of completely independent modules (individual convectors), which strongly resembles a construction kit. The user can, as from cubes, build heating according to the planned scheme, disassemble and build again, remaining confident in the constant reliability of the devices. Despite the fact that only NOIROT has implemented such a system, such flexibility and freedom- a very good incentive for other manufacturers.
The most advanced models of convectors are equipped with a monoblock heating element, that is, the heating element and the radiator form a single whole. Here, each manufacturer has its own know-how. For example, the French company NOIROT has developed and patented a heating element called RX.Silence. The uniqueness of its design solution- innichrome filament, surrounded by a dense backfill of the finest magnesia powder and tightly pressed into a one-piece cast silumin body with fins. Moreover, the materials are selected so that they have the same coefficient of thermal expansion, which means that the mutual displacements of structural elements during heating and cooling are insignificant. This ensures the durability of the element and complete noiselessness of its operation. BUTthe fins are designed so that the heating element is “transparent” in vertical projection, so that dust does not accumulate on its surfaces and does not burn out. A similar design is for heating elements from NOBO (Norway), in which the filament is placed in a quartz backfill. The service life of such heating elements- from 15 to 20years.
The presence of a thermostat allows the electric convector to maintain the set temperature in the room with great accuracy. Thanks to this device, the convector panel acquires the ability to independently turn on and off when the air is heated to a predetermined temperature. Thus, the device does not work constantly, but in the mode of short inclusions, which leads to a small energy saving.
Electric convectors use both electromechanical and electronic combined thermostats (withair temperature sensor). Disadvantages of thermostats of the first type- relatively low accuracy of air temperature measurement
So, convectors of the Unique series from
Firms specializing in the production of convectors produce models with and without a built-in thermostat. In the built-in thermostat, the sensor will be obviously less accurate, because it is affected by the temperature of the convector body. ATheating modules of this type, the regulator is usually calibrated in relative units and requires individual calibration- it allows you to achieve a correspondence between the actual temperature in the room and the position of the regulator. The remote thermostat regulator is marked in degrees and takes into account the temperature of the point in space where it is installed. As a rule, the combination thermostat is attached to the wall at a height
The same if several convectors are installed in the room. It is more expedient to use one thermostat, usually electronic, for the entire group of heaters.This significantly reduces the overall cost of the equipment. This ensures the flexibility of control, that is, the exact maintenance of the required temperature in the room at any time.
For example, in NOIROT convectors, the switch can be set to the programming mode. ATIn this case, the heating panels will be controlled according to a single program through an external (purchased additionally) or internal programmer of one of the convectors. Programs are recorded on a special cassette placed in the control unit. Heating panels of the Melodie Evolution series are equipped with a control system with an electronic thermostat programmed for 4modes (comfort, economical, anti-freeze and stop) and a switch designed for the same modes plus programming. ToConvectors can be connected to a special Memoprog control cassette, which is purchased for a separate fee. Tofor Super Spot series appliances, an Eco control cassette is connected6: the programs already incorporated in it regulate the operation of heaters throughout the week, including weekends.
Adjustable temperature range in modern convectors-
|Melody Evolution Series
|Height 400mm, only for rooms with high humidity
|R 80 XSC
|Single electronic thermostat
|Double electronic thermostat with timer
(9 fixed programs)
|R 80 UDF
|Double electronic thermostat with timer
(12 fixed programs)
|All types of panels
|200 and 400 height modelsmm
|Skirting boards, 200mm
|Elite series; 6models of various standard sizes and capacities (withstep 250W)
|Height of all panels 174mm
(max. load 22BUT)
(max. load 17BUT)
(max. load 17BUT)
|Models in four sizes
|Height of all panels 420mm
|Height 520mm, length 320mm, panel depth 82mm
|convector “Thermia” of seven standard sizes
|Height of all panels 460mm
model with fan
|CNS series; 8 models of various sizes and capacities (withstep 250W)
|Height of all panels 450mm
|Series F17‑3, with electro-mechanical thermostat
|Height of all panels 450mm
|Series F117, with electronic thermostat
|Height of all panels 450mm
According to their geometric dimensions, convector panels are divided into three main groups: high (height
As a rule, manufacturing firms produce models with a capacity of 0.5 to 3kW in steps of 250W and weight from 3 to 9kg. Andpower, and weight depend on the dimensions of the panels. High panels create draft as in a conventional chimney, significantly increasing heat transfer, so their length is negligible. Skirting convectors are designed for installation under low windows or stained-glass windows. The temperature of the heating element in models of this type is somewhat lower than that of tall appliances, and in order to maintain the heat dissipation of the convector, it is made longer (sometimes up to2.5m). ATAs a result, low heaters work just as efficiently as high ones. By the way, skirting convectors create smaller convection flows, providing more uniform heating of the air, especially in the lower part of the room space.
Today in domestic stores you can find convector electric heaters from companies such as
Capital costs for the installation of the main heating system of a private house based on electric convectors range from $4 to $8 for 1m2 heated area. It is much cheaper than installing underfloor heating or a standard heating system with a boiler, circulation pump, expansion tank, shutoff valves, heavy radiators, etc.e. In addition, time is significantly saved, and the scale of work itself is incomparably smaller. Imagine at least that instead of pipes you only have to “throw” electrical wiring. The panels themselves look quite elegant and fit perfectly into any interior.
When choosing the power of a convector, the following rule is used: for buildings with normal thermal insulation, approximately 70W per 1m2; for buildings with poor thermal insulation- already
100–130 W/m2.The total space heating power can be calculated from the table below.
Simplified choice of electric convector power
Room type Bathroom Kitchen Children bedroom Bedroom Living room Room dimensions, m2 5–7 7–11 7–13,13–18 15–21 20–28 Heating power, W 500 500 1000–1250 1500 2000
Another variant- based on the volume of the room, based on the calculation: 40W per 1m3. Additional heat losses due to external walls should also be taken into account. If the room is angular or has a large glass area, it is advisable to select equipment with a power reserve. This will simply affect the rate of heating the space to a given temperature. If you take a model with a deliberately low power, it may happen that the device simply does not reach the desired temperature regime and will work all the time.
For the most powerful panel
(at least 2 kW)it is necessary to select electrical wiring with a conductor cross section of 2.5mm2. The main thing to focus on- the main core of the cable must correspond to the total power of the consumed current of all panels in the house.
The editors would like to thank WHITE GUARD Trade House and GRAND-OTEX-REGION, RUSKLIMAT, SVIGI companies for their help in preparing the material.