Which radiators are better bimetallic or steel Comparison and choice

Features of bimetallic batteries

To level the shortcomings of aluminum, engineers developed the so-called bimetallic devices. They consist of a steel core with high corrosion resistance and an outer aluminum shell with a powder protective and decorative coating. This combination gives the main advantage of bimetallic radiators over aluminum ones: optimal thermal conductivity and low thermal inertia.

What is the difference between aluminum radiators and bimetallic ones? The former are sensitive to the composition and temperature of the water, pressure and design. Cons of the second type:

less clearance inside, which increases the likelihood of blockages;
heat transfer is 20% lower due to the lower thermal conductivity of steel;
higher prices for bimetallic heating batteries - by an average of 15-40%;
if oxygen enters the system, active corrosion and destruction of the metal begins;
low-quality products in the contact zones of aluminum and steel have areas of local overheating, which leads to a deterioration in consumer properties and damage to devices.

Regarding the complexity of the installation, reviews of bimetallic and aluminum sectional radiators are similar in that special care is required with the latter. Aluminum is a soft metal and can be easily deformed

What is required for installation: accurate calculation, a set of keys and some tools (screwdriver, pliers, drill), shaped elements. A battery kit is assembled, the necessary taps and nipples are installed. Mounting points are marked and installed. The device is placed on brackets, checked by level, threading, connection and appropriate sealing are carried out on the risers. The cost of services of professional plumbers in Moscow is from 1,500 rubles.

In terms of design, both types fit perfectly into modern interiors, and a large selection of colors allows you to do without camouflage screens and screensavers. Thus, the answer to the question "which radiators are better - aluminum or bimetallic?" lies within their scope. For autonomous systems, the former are used, for centralized systems, the latter. And since they work on the principle of convection and significantly dry the air, it is recommended to purchase humidifiers.

Which radiators to choose recommendations

At various forums dedicated to the heating of private houses and apartments, disputes on this topic do not subside. The average homeowner or tenant who goes there looking for information may never find the truth. The situation is aggravated by artificially created myths, pursuing one goal: to sell some products.

The main myth about the insufficient working pressure of aluminum radiators has been debunked by us, but there are others:

when working in centralized networks, silumin is quickly corroded by corrosion, so only bimetal is needed;
aluminum forms a galvanic pair with some other metal in contact with the coolant, and therefore quickly collapses;
as a result of chemical reactions of the aluminum alloy with dirty water, a lot of oxygen is released into the system;
steel inserts of bimetallic batteries rust and rot through, which is why the section has to be thrown away;
other incredible stories.

The processes described in the myths take place, but to a very small extent. For any serious consequences to occur, it takes not years, but decades. Provided that you did not buy a cheap fake and put the batteries correctly. And there are steel parts in aluminum heating appliances (connecting nipples).

Finally, we will give a number of recommendations that contribute to the best choice of radiators for your home:

The optimal solution for autonomous heating systems operating from their own boiler is aluminum batteries.
They are also perfect for multi-family homes. Only buy quality products from trusted manufacturers and do not forget to compare the working pressure.
In multi-apartment high-rise buildings (16 floors or more), it is better to install bimetallic radiators.
If the heating system of the "high-rise" is not a riser, but with horizontal branches included in each apartment, then aluminum batteries can be installed.
Advice to users who are not convinced by any arguments: buy and install bimetal heaters in your home and feel calm.

Any radiators connected to central heating will last longer and heat more efficiently if they are periodically flushed. Ideally - annually, in extreme cases - once every 3 years. Also, a lot of valuable tips on choosing the right batteries can be gleaned from the video of our expert:

Best Answers

Paul Acc:

Aluminum heatsink:

1. Working pressure - 16 bar. 2. Crimping pressure - 24 bar. 3. Safety margin - 60 bar. 4. The maximum temperature of the heat carrier is 120°C

Bimetal radiator:

1. Maximum coolant temperature -110 C 2. Maximum operating pressure - 20 bar 3. Crimping pressure - 30 bar 4. Heat dissipation of 1 section - 171 W 5. Inlet - 1″

BABY:

Heat exchange during heating.

Maria Leon:

Bi is more expensive. And everything is Chinese.

Alexey Fedorov:

Bimetal is better. Withstands heavy loads and longer service life.

The Scarlet Flower:

Probably only at the price, but they heat the same way. I recently did heating, the master advised me to take aluminum ones, he said that they have better heat dissipation, they heated the winter normally, it was hot.

vnemugI:

For an apartment, bimetal is better because it is less susceptible to damage from aggressive components in water and holds more pressure than aluminum. Aluminum for a private house will be fine, where the system is filled with special antifreeze. In general, you know that there is nothing more reliable and better than cast iron. You can find out more here - .glavteplotorg /scat/cat36

vikont.X:

no difference at all. let's say the boiler gives +50 degrees. , then the heat exchanger will be +50 degrees. even if it's made of gold. the only difference is…. if you turn off the gas, some will cool faster than others. the same thing happens when they are heated, some quickly heat up others more slowly. everything goes to zero. buy affordable. advice: cast iron should be checked with a dosimeter, a lot of this junk is brought to us secretly from Chernobyl.

Yuri Uncovered:

I join the opinion that bimetal is definitely better, and even for a private house.

Alex Mishin:

In my apartment, aluminum radiators have been ideally serving for 12 years - domestic ARRPZ, now, alas, they are very difficult to find on sale. Imported models are worse because they have thinner internal channels through which the coolant flows.

Bimetallic radiators come in two fundamentally different designs. In some, a steel tube from the radiator fin goes into an aluminum manifold, and a galvanic couple is obtained that is in contact with water. Corrosion of aluminum in this place is, of course, extremely intense. In the second case, the water flows completely through the labyrinth of steel tubes. The tubes are covered with aluminum from the outside. In this case, it is not at all clear - why then aluminum? !

Why were bimetallic radiators invented at all? Yes, simply because it is easier for the manufacturer to take ready-made steel tubes than to form channels directly in aluminum! And the marketing of what happened as a result is designed to ensure the eloquence of advertisers ...

Sergey Arefev:

The site offers all different types of radiators and not only. s.a-lpha

The most popular manufacturers

Features of the manufacture of metal radiators most often force the company to focus on the production of one type. For the Russian market, adapted products are most often supplied with appropriate internal processing (protective film, etc.).

With the onset of cold weather, the sale of aluminum and bimetallic radiators from such giants of the heating industry as Global, Royal Thermo and others is activated. Consider known models:

1. Bimetal devices from the Italian company Global of the Style, Plus and Extra series are designed taking into account Russian realities. They differ in rounded shapes, the presence of an additional convection rib. They have increased heat transfer - up to 190 W per section, withstand pressure up to 35 atm. The simple yet ergonomic design eliminates air pockets.

2. Royal Thermo BiLiner bimetal radiators have a stainless steel core that is neutral with respect to super-aggressive thermal fluids. Aerodynamic design, unique shapes of convection windows ensure high efficiency of the device and even distribution of heat throughout the room.

Aluminum devices of the same manufacturer of the Revolution, Indigo, DreamLiner series are made by casting with a two-layer powder coating. A wide vertical collector provides high heat transfer, the interior is treated with a special anti-corrosion compound. Working pressure - up to 16 atm.

3. Bimetallic Santekhprom BM are designed taking into account Russian centralized heating, have thickened core walls, pressure - 16 atmospheres, maximum - 23. The service life of the unit is at least 25 years.

4. The Russian company Rifar produces aluminum and bimetallic radiators with a wide center distance, which gives a high degree of heat transfer combined with a maximum margin of safety. Devices provide a flow from 100 to 200 watts. The Bimetal Basic series is designed for new buildings, the Monolith with welded seams is perfectly adapted for apartment buildings with a strong wear of the system. Aluminum radiators Alyum operate under pressure up to 20 atmospheres, have low hydraulic resistance to the movement of the thermal carrier, and are unpretentious to the composition of the liquid.

The cost of devices is an important factor in the eyes of a potential buyer. Often, high-quality products "sit" in one price niche due to special characteristics, an increased margin of safety and design. More details of the cost in Moscow and the Moscow region are presented in the table below:

Name	The country	Products	Price per section
Global	style plus	Italy	bm	600
Extra	bm	650
Royal Thermo	Biliner	Italy	bm	550
Revolution Indigo Dream Liner	A	500
Santekhprom BM	Russia	bm	540
Rifar	Basic	Russia	bm	480
Monolith	bm	620
Alum	A	420

Expert answers

Shura Blum:

Magnet.

Sergey Pomotov:

by passport

Valckhall:

by weight, in bimetallic radiators inside a welded frame made of steel pipes, due to it they hold more pressure than aluminum ones, but because of it they are much heavier.

◆ Cymus ◆:

Bimetal heating radiators

Over time, more and more people are thinking about replacing heating radiators in a city apartment, but are lost in the variety of their types. Bimetallic radiators are the optimal and modern solution to the problem of heating for a city apartment with a centralized heating system.

The prefix "bi" (i.e. "two") in the phrase bimetallic radiators indicates that heating radiators are made of two metals. As a rule, it is steel (inside, in contact with the coolant) and aluminum (outside, in contact with air). The steel inner coating, 2.5 mm thick, makes bimetallic heating radiators capable of withstanding high operating (up to 40 atmospheres) and pressure testing (up to 60 atmospheres) pressure and resist corrosion for decades.

Also, steel does not collapse under the influence of alkali, which is used in the central heating system to remove scale from heating pipes. Thus, bimetallic heating radiators with a steel frame are strong, reliable and durable.The shape, appearance and high thermal conductivity of bimetallic heating radiators are acquired thanks to the aluminum shell, which provides additional heat transfer to heating radiators.

Aluminum radiators The advantages of even the best heating system can be negated by improperly selected or low-quality radiators. And this is obvious - after all, a heating radiator is the device that transfers heat to the right place. No one denies the merits of cast-iron radiators familiar to us since childhood. They are reliable, serve for a long time, but they take up a large amount of space in the house, and because of their weight they are extremely inconvenient when installing the heating system. Another, but far from unimportant claim is made against the hostess' cast-iron radiators - they are very difficult to clean and wash, and painting them with high quality is a total torment! Modern aluminum radiators surpass their cast-iron ancestor in almost all respects. They are light, transfer heat well into the room, are small in size and have a flat surface that is easy to clean with standard detergents. Our company, along with other heating equipment, offers aluminum radiators from the best manufacturers. In our stores, the buyer can easily select the necessary thermal appliances made of aluminum. Don't forget to keep in mind that the area of an aluminum radiator should be about three times smaller than that of an old cast iron one - otherwise you will get too hot!

Chairman:

By weight: bimetal radiators are heavier than aluminum ones