What better Bimetallic radiators or cast iron - comparison Performance

By Admin | Heating And Heaters
13 April 2016

withstand the rigors of everyday life of the district heating is capable of not every type of radiator.As it turned out, a bimetal and iron do not burst from high blood pressure and corrosion do not eat for a couple of seasons.Yet what better radiators - bimetal or cast iron - review and compare their specifications.

What better than cast iron radiators and bimetal


  1. structural differences and appearance
  2. compare heat radiators
  3. ability to keep the pressure
  4. Resistance to poor quality coolant
  5. Maximum temperature of the coolant and itsfluctuations
  6. durability and service life
  7. What radiators are easier to install
  8. Talk about the difference in price radiators
  9. Draw conclusions and determines overlooking radiator
  10. Video: Replacement of radiators in the apartment

structural differences andappearance


begin with radiators made of cast iron, which today have changed their design, but, as before, have wide water

channels and are made up of several sections of the cast.Heat-resistant gaskets of rubber or paronita which enclose between sections give the desired tightness.The length of the finished radiator is determined by the number of sections, the height ranges from 0.35 to 1.5 meters, and the depth and can be 0.5 meters and a few centimeters.In accordance with the amount of space you can select the size of the radiator, thus it is possible to modify it (for example, to remove the excess section or add a few new ones).

Cast iron radiators
Types of cast iron radiators.

It is worth to mention the models of radiators, artistic cast iron.Not only are they perfectly will warm the room, but also able to give it charm and charm.These radiators with more elaborate injection molding on the surface patterns produced mainly foreign manufacturers.Like any piece of art, such devices are a lot of money.

Artistic radiators
Several types of artistic cast-iron radiators.


housing bimetallic radiators from aluminum, the shape of its ribbed-figured.So he arranged for better heat transfer.Under the body hides a solid steel core - this refers to the "real" bimetal radiators.However, there is also polubimetallicheskie (or psevdobimetallicheskie) radiators - the difference between them is that a reinforced steel vertical channels radiator.The remaining part is made of aluminum.Such a device is 20 percent cheaper than a fully bi-metal, and gives more heat.But it is less reliable and durable, and use it in a centralized network is not highly desirable.

Bimetallic radiator
device bimetallic radiator.

like cast iron radiators, Bimetallic their colleagues, as a rule, sectional, which allows them to be modified.Usually models are sold with an even number of sections.A small segment of the market occupied by monolithic models that disassembly, assembly, and not subject to improvement.Design of bimetallic radiators is very attractive.

Appearance: Cast + - | Bimetallic +

compare heat radiators

iron.Again, start with the traditional cast iron radiators.They are so slow that at times can be frozen, waiting to warm up a cold room.But after all these cool radiators long time - and it is quite another matter.After all, there are cases when the heating time - on and off.Because of the accident or repair, for example.A cast-iron battery near long enough, you can bask.

great advantage of cast iron products - that they heat the room, not only by convection, but also the ray method.That is, when they are turned on but the air becomes warm and the batteries are close to the objects.With regard to the thermal power, it is usually given to one section and is from 100 to 160 watts.This average values ​​which have different patterns may vary.

bimetal.Good these radiators is that they simply heated instantaneously.However, cool as quickly, alas.Heating them carried out mainly on the principle of convection - radiation component is much smaller.This is some disadvantage.Thermal power at the sectional models comparable with cast iron products.This index ranges from 150 to 180 watts (on average).If we compare the rate of heating the room, they certainly benefit from iron.

Heat dissipation: Cast + - | Bimetallic +

ability to keep the pressure

In the traditional central heating system, typical of high-rise buildings, the pressure is not stable.Sometimes there is even a hammering.It taps the circulation pumps according to the rules should be incorporated gradually, but often employees do not follow these rules.A dramatic overlap in its hot water pressure throughout the system jumps so many batteries that burst.Therefore, residents of the apartments will certainly have to choose radiators with a good margin pressure.

Cast iron radiators can withstand 9-12 atmospheres of pressure.That may be enough until then, until there is a strong surge.If it still happens, brittle cast iron, unfortunately, can burst.Therefore, when viewed from this perspective, it is better to cast iron radiators and bimetal, it is better to err and take the course bimetal.

After bimetal radiator is not afraid of no pressure surges - the passport he claimed figures for this parameter to 20-50 atmospheres (depending on model).So even the powerful hammering a quality product from bimetal are not able to break.And also mention about the models with monolithic steel core - they can and up to 100 atmospheres easy to sustain.An example of these radiators may be Russian-made radiators Rifar Monolit, its technical features you can see in the photo below.

Monolithic bimetal radiator

ability to keep the pressure: Cast - | Bimetallic +

Resistance to poor quality coolant

Another shortcoming of central heating - the dubious quality of the coolant.Hot water coming from the pipes in radiators or different purity or chemically neutral.And it has a considerable fraction of the smallest grains of sand and pebbles that could affect the internal walls of the battery, as an abrasive.

iron chemically absolutely "calm", so a high level of alkalis or acids in the hot water will not hurt him.And in the summer, when there is universal draining the system without prorzhaveet.But pebbles, abrasives it is not to their liking - abrade gradually.However, if the walls are fairly thick radiator is not as critical.

bimetal during the heating season is also resistant to chemically active water.However, in the summer when the water is drained from the system to carry out repair and maintenance work in the radiator air appears, the iron core can be attacked by corrosion.So it does not hold out to the bimetal iron for endurance.

not a quality coolant: Cast + | Bimetallic + -

maximum coolant temperature and its fluctuations

and temperature of the coolant in our heating systems does not possess stability.That pipe barely warm, then hot like fire.It is important, as radiators behave in the latter case, you will stand too hot water.By this parameter the following figures.For the cast iron radiator - coolant can be heated up to 110 degrees.Hot water flowing through the pipes bimetallic radiator core may have a temperature up to 130 degrees.But in general, both types of radiator tolerate temperature changes.The only thing that because of the difference in expansion of steel and aluminum, with a sharp change in temperature at the bimetal radiator can hear small crackles.

maximum flow temperature: Cast + | Bimetallic +

durability and service life

iron products with proper care and periodic flushing live a very long time - for half a century or more.Some old houses are even instances whose age has passed for a hundred years.Bimetallic radiator manufacturers released 15-20 years (sectional) and 25 years (monolithic).Cast in this respect "rules" as you can see.

durability and service life: Cast + | Bimetallic -

Which is easier to install radiators

here and argue about - of course, with cast iron installation problems and will carry more.And raise such a battery can not afford one, and brackets for her special needs - particularly strong, and the wall of plasterboard it will not stand.

And again, getting cheap domestic radiators, we must be alert to the need to further their painting and drawing.

But working with bimetallic radiators - we can say it is a pleasure.They are gently and tidy that hang them (and on any surface) is not difficult.And if at first you ease of installation, the answer to the question, what is better - bimetal radiators or cast iron, is unequivocal.Of course, the bimetal.

Easy installation: Cast - | Bimetallic +

Talk about the difference in the price of iron radiators

undoubtedly cheaper, especially domestic production.For example, the cheapest model of MS section, for example, only costs about 300 rubles.However, such a "tasty" price will be only classical models.But radiators in "retro" style, made by art casting, there are several times more expensive.Similar models brand Konner cost from 2,000 rubles (per section).

Sectional model of bimetallic radiators will be more expensive than comparable cast iron.For example, one section of the radiator from the company Rifar (Russia) will cost a minimum of 500 rubles.The price of the Italian section of the same radiator starts from 600-700 rubles.

Price: Cast + | Bimetallic -

Draw conclusions and determines overlooking radiator

Now, after comparing iron and bimetallic radiators, we can confidently say that in the old apartment buildings up to five floorsa good option would be cast iron radiators.Pressure applied to the system, they can withstand.Of course, if there are no powerful hammering.But here you have a choice and if finances allow, then of course it is possible and more stylish bimetal deliver.

If the apartment is in a high-rise building, and the operating pressure of the coolant will be substantially higher.Therefore, in this case, a reasonable supply bimetallic heaters that have a longer life pressure.

Well, yet another nuance.If you previously in your apartment were cast iron radiators, you can change them to a more modern cast iron radiators, and bimetal products.But after a steel or aluminum bimetal definitely better bet.

With autonomous heating system, you can put any of the radiators, but usually in such systems is most advisable to use steel or aluminum radiators.

Video: Replacement of radiators in the apartment

  • reviews bimetallic heating radiators
  • Reviews of cast iron radiators heating

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How to choose a bimetallic radiators
How to choose a bimetallic radiators - the selection criteria and the calculation of the required number of
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What radiators better choose an apartment with central heating
Specifications cast iron radiators
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Features and specifications of bimetallic radiators
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