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Stainless Steel, Electric and Flat Panel Radiators

Radiator panels have aluminum, steel, panel, and electric types, each of which is used according to its characteristics and the conditions of the relevant environment. In the following, the capacity estimation method, the selection method, and the best purchase price of all types of steel, panel, and electric radiators have been examined for wholesale purchase.

Stainless Steel, Electric, and Flat Panel Radiator Selection Guide

One of the oldest methods of heating in apartments, residential, and office spaces is the use of heating radiators. It works in such a way that the heat of the radiators is distributed through heat transfer and displacement in the air.

After warming the air in the vicinity of the radiator fins, the warm air moves upwards, and the cold air replaces it. This continuous air displacement causes the room's air temperature to increase gradually. Of course, part of the heating of the radiators is also done by the radiation method.

The water in the panel (radiator) or in the heating central boiler of the building (engine room) is heated by equipment such as burners and is directed to different parts of the building by the pump. After that, this hot water enters the radiator and transmits its heat through displacement and radiation to the environment.

The most suitable places for installing and operating a heating radiator are places that do not require precise control of temperature and humidity, as heating radiators usually do not adjust the temperature and humidity of the environment and even reduce the relative humidity of the room. (However, if you install a thermostatic valve, you gain the ability to adjust the ambient temperature in a good way, and not only that, you also save energy and relevant costs.)

Note: Unlike aluminum radiators, steel and panel radiators are produced as an invisible block, which means the number of fins cannot be reduced or increased by the user.

Stainless Steel Electric and Flat Panel Radiators

Factors to Consider When Buying a Heating Radiator

Steel and panel radiators are produced as an inseparable block. That is, outside the factory, you cannot add or subtract a section to them. (But in the case of most aluminum radiators, this feature can be changed in the section numbers.)

The width of each steel radiator is about 4.5 cm, and each square meter of steel radiator produces about 440 kcal/h (under normal conditions with a temperature difference of 60 °C).
To calculate the number of steel radiator sections required by each room, consult with the experts of DamaTajhiz HVAC sales.

Since the working pressure of steel radiators is about 5-6 BAR, they are not a good option for buildings with more than 14 floors.

For climatic conditions such as Tehran, Isfahan, Shiraz, Semnan, Mashhad, Kermanshah, Khorramabad, Mosul, Kirkuk, Erbil, Kabul, Aleppo, Damascus, etc., about 85 kcal/h per square meter for middle floors, 95kcal/h per square meter for the floors above the parking lot, and for the floors located directly under the roof 120 kcal/h of heating power per square meter.

NOTE: This is for normal conditions where only one wall is exposed to cold air. For each extra wall that is in contact with the cold air, add about 20% more kcal of energy.

Now, you can estimate the number of required fins by dividing the heating number by the heating capacity of the fins (the amount of heat produced by the fin is specified in the technical specifications table of each model).

At the end, by dividing the obtained heating number of each of the spaces by the heat produced by each section of your chosen radiator, get the number of radiator sections needed. (The heat produced by each section of the radiator is specified in the specifications table of each model.)

We emphasize again that using the thermostatic valve of the radiator to adjust the indoor air temperature in the winter will provide more comfort when the temperature fluctuates, and the sun shines outside, as well as saving about 30% of your fuel consumption.

How Steel Radiators Are Made

The steel radiator production process does not require complex technical knowledge, and the production process of its conventional operations in the metal industries, including sheet stages (cutting, pressing, and forming), welding (resistive welding and oxyacetylene), coating, and quality control. After that, it comprises the water test, and the main materials used are ST12 standard steel sheets with a thickness of 1.2 mm. Also, in the stage of painting steel radiators, a common gray color or electrostatic cream is usually chosen by the manufacturer or the customer.

Electric Heating Radiators

Using electric radiators due to their ease of operation, high safety, and noiseless performance is one of the most popular choices for supplementary heating systems.

An electric radiator, also known as an "oil radiator," is filled with a special oil instead of water and has the general shape of radiator grids. The elements placed in the radiator heat the oil, and the heating of the radiator sections heats the environment.

Electric radiators are safer than gas heaters, but the cost of power consumption is greater. This is why electric radiators are recommended for bedrooms and small-to-medium-sized rooms where gas heaters cannot be used.

Electric radiators mainly contain 5 to 15 sections with a power consumption of 900 to 2000 watts. Electric radiators also have an automatic thermostat and two heat modes. Moreover, some models even have a fan to accelerate hot air distribution.

Note: The oil in this device is a permanent heat transfer and never needs to be replaced.

The oil heating element is placed inside the electric radiator. When the convection system heats the oil, hot oil is transferred to the top and cold oil to the bottom of the device, and this cycle continues continuously. The heat capacity of oil causes more energy to be absorbed in a smaller volume (compared to water).

The formula for calculating the heating capacity of a panel radiator

QT=[(U1*A1+...+U1*An)∗ΔT+(V*0.0749*0.24* ΔT)]*4


QT heating load of each unit in kilocalories per hour
U1 to Un is the heat transfer coefficient of each of the surfaces between the inside and outside of the building in terms of Btu in / (h ft2 oF), which should be determined based on the material of each of the walls using engineering reference tables.
A1 to An is the area of each of the peripheral surfaces of the corresponding unit that transfers heat to the outside of the building. This area (in square feet) includes walls, windows, doors, and ceilings.
ΔT is the temperature difference between the inside and outside of each unit under normal conditions, which is in °F.
V Total amount of air infiltrating through door or window seams (CFH) in ft3/hr
Constant factor 0.0749: air density in conventional conditions in the English unit system
Constant coefficient of 0.24 specific heat capacity of ambient air in conventional conditions in English units
In the above formula, by calculating the values of all the parameters, you can get accurate results to determine the value of the panel radiator in each of the rooms. Note that the exact values of U and area A for each of the surrounding surfaces must be considered based on specific details in each building and engineering tables of the heat transfer coefficient.

electric radiator

Benefits of an Electric Radiator

Electric radiators are suitable for optimal and continuous heating in small to medium-sized environments and are much safer due to the oil and element separation. Some electric radiators even have a built-in towel dryer. Another benefit of electric radiators is their ability to move on wheels for easy transportation.

Choosing the Right Electric Heater

Follow the guidelines below in order to buy the most suitable electric heater for your needs (in normal weather conditions):

  • 5 to 7-fin electric heaters are suitable for rooms of 6 to 8 square meters with a height of about 2.8 meters.
  • Electric heaters with 7 to 9 fins are suitable for 8 to 10 square meters of room with a height of about 2.8 meters.
  • 9 to 11 fins electric radiators are suitable for a 10 to 12-square-meter room with a ceiling height of about 2.8 meters.
  • Electric radiators with 11 to 13 fins are suitable for 12 to 15 square meters rooms with a height of about 2.8 meters.

electric heater

Types of Steel & Panel Radiators

The panel type of steel radiator is made of two pressed iron sheets with a thickness of 1/2 mm facing each other, with hot water flowing between them.

Panel radiators are produced as single convectors or as two convectors (with twice the width and more heating) in blocks of 50, 60, 80, 90, 100, 120, 140, 160, and 200 cm long.

The sectional type of steel radiator is made of an iron sheet with a thickness of 1.25 mm in different sizes; usually, radiators of sizes 200x600, 500x200, and 300x200 mm are among its types. The number 200 mm indicates the width of the sections, and the number 600, 500, and 300 is the distance from the bottom axis to the top of the steel radiator in millimeters.

Steel section radiators can create a good thermal surface in a relatively small space because they are made in the form of sections.

Advantages and Disadvantages of Panel Radiators

Panel radiators are often made of steel, and today, their use has become popular in most European countries. The use of panel radiators is increasing due to their greater elegance, beauty, and more reasonable prices than other types of radiators.

The features and benefits of the panel radiator include the following:

  • More uniformity in providing ambient heating than sectional radiators
  • The surface of the uniform and widespread radiation and the heat of the radiator more than the sectional radiator (the greater the share of radiation heating than convection heating, the more Suitable·)
  • Integrated installation and good sealing
  • Ability to be installed from both sides
  • for most interior decoration designs

Flat Surface or Panel radiators also have disadvantages and weaknesses, which are as follows:

  • Due to the use of steel, it is possible to rust and pierce steel or panel radiators in humid environments compared to a variety of aluminum radiators, especially in the long run.
  • If the body of the panel radiator is damaged and pierced, it is almost possible to repair it. (The entire panel should be replaced.)
  • It is not possible to increase or decrease the length and thermal capacity of each block of steel and panel radiators. (In such cases, the heat capacity can be increased by branching from the radiator pipe and using a separate radiator panel.)

panel radiator

Flat Surface & Steel Radiator Buying Tips

As usual, we emphasize the accurate calculation of the building's thermal loads by the software, and the confirmation of the engineer is required. In order to buy the most suitable heating radiator that will serve you for a long time. Here are the 4 tips you best keep in mind when buying a heating radiator:

  1. You need to install radiators at the cold spots of the building (under the windows and near the outer walls of the building) so the device can deal with the cold more efficiently.
  2. Today, the use of radiators thermostatic valves instead of conventional ones is a completely intelligent and economical choice, and high fuel cost of up to 30 % (due to the heavy fuel costs), which will result in a lower gas bill as well as a significant impact on extending the life of the boiler.
  3. The use of an automatic bleeding valve makes it easy for the bleed and, in addition to providing complete heating of your home in the winter, reduces the risk of radiator leakage.
  4. Regular and timely bleeding is one of the most necessary maintenance of heating equipment. Note that the moral and regular bleeding of the heating system must be carefully performed every year when the circulator pump is turned off.

Heating Radiator Installation Location

In winter, the heating radiator transfers heat to the room. However, the temperature of the room does not rise, and this temperature often remains constant. The reason is that the heat produced is lost through the walls and the penetration of outside cold air.

Heat loss occurs in two ways. One is the heat loss caused by the surrounding walls of the building, such as the roof, floor, wall, window, etc. The other is the heat loss caused by the penetration of cold air outside through the window seams.
In other words, whether we like it or not, thermal losses occur in buildings. Of course, we can use double-glazed UPVC windows and the use of radiator thermostatic valves; in addition to reducing the amount of heat loss, we can also be completely economical in energy consumption.

The height of steel radiators is 6 cm higher than the total height of each blade after installation on the base, and you might as well keep it in mind when doing your calculations so that the radiator height does not collide with the window above it.
Pay attention to the overall dimensions of each panel or steel radiator block you choose according to its installation location in the unit so that the height of the radiator does not collide with the window above it and the length of the radiator block does not collide with the electrical outlets.

Buying Steel, Panel, and Electric Radiators

Due to the accumulation of hot air under the roof, the use of radiators is only suitable for the floor to the ceiling of up to 3 meters. For spaces with higher ceilings, the use of other heating equipment, such as a fan coil, Heater, radiation heater, etc., is recommended.

Determine the required heating capacity before anything else in order to buy the right device. On the website of DamaTajhiz HVAC Group, technical information on dozens of steel, panel, and electric radiators from reputed brands, along with their eligible guarantee, has been provided for you to experience optimization and smart shopping.

Also note that in the specialized HVAC group of Damatajhiz, all the steel, panel and electric radiators are only sold in bulk. Therefore, if you want to wholesale theese products, contact us.

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Price of Steel, Panel, and Electric Radiators

Feel free to browse and select the required heating radiator at the best price only on DamaTajhiz HVAC. The price of steel, panel, and electric radiator varies based on the capacity, models, and brands available in the market; it should be noted that all prices are up-to-date with a generous discount already considered. Therefore, the best price for all steel, panel, and electric radiators is guaranteed for wholesale purchase.

Dear Users

While thanking you for the trust you have in the technical opinions of Damatajhiz HVAC Group sales experts, it should be noted that the choice of the desired product brand based on history, brand strength, service, and product price is ultimately determined by the buyer. But in Stainless Steel, Electric, and Flat Panel Radiators, most of the users and buyers of best-selling brands such as Iran Radiator, Butane, and Lorch are according to their quality, price, and after-sales service.

After reading the above material, you have more questions to decide on the type of Stainless Steel, Electric, and Flat Panel Radiators you need; you can contact the heating equipment and engine room department experts after contacting the DamaTajhiz HVAC Group and extension numbers 107-108-121-122. Get advice and ask your questions.

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