What better aluminum radiators and bimetal

By Admin | Heating And Heaters
15 April 2016

That ended with grief in half the heating season, after which the issue of changing batteries rose to the fore.Leaky ancient cast iron radiators it is time to send a well-deserved rest, putting instead something more modern.Private developers, installation of heating, too often can not determine the type of radiator.Faced sellers in shops, praising the most popular models, uninformed buyer is confused.And what better radiators - aluminum or bimetal, it never is.Perhaps look at the matter objectively?

What to choose aluminum radiators and bimetal


  1. proceed to a comparison of bimetallic and aluminum radiators
  2. What are the radiators for some systems are more suitable
  3. Video: Installation of aluminum and bimetal radiators

proceed to a comparison of bimetallic and aluminum radiators

What is the view of every radiator

1. aluminum radiators, neat and stylish, consist of several sections connected nipples.Gaskets having between sections give the desired tightness.The ri

bs are located on the inside, can significantly increase the area of ​​the heat output of up to 0.5 square meters.Make radiators in two ways.The extrusion method offers a cheap and light products are not of the highest quality (in Europe this method is not used).More expensive but more durable radiators are made by casting.

Aluminum Radiator
One of the types of aluminum radiators.

2. Bimetallic radiators are made of two different metals.A housing equipped with ribs made of aluminum alloy.Inside the case there is a core of tubes through which flows coolant (hot water heating system).These tubes are made either of steel or copper (the latter have practically not occur).Their diameter is smaller than that of aluminum models, so more likely to clog.

Bimetallic radiator
Appearance bimetallic radiator is very aesthetic and the design meets the most sophisticated demands.All steel components of it hidden in the Inside.

allowing more heat - bimetal and aluminum?

If you compare the heat, the aluminum battery immediately welling forth.They one section capable of giving more than 200 watts of heat energy.And half of the heat is given in the form of radiation, and the second half - convection method.Due to the ribs protruding from the inner side sections, heat loss is still increasing.So in that respect unrivaled aluminum.Note that it is also the minimum thermal inertia.Including the battery - and after 10 minutes in the room is warm.In a private house this allows a good save.

Consider now the bimetallic devices.Impact of heat from one section depending on the model and the manufacturer.It is somewhat lower than the all-aluminum radiator.Because the core of the steel reduces the total heat transfer, which may be one-fifth less than the aluminum radiator of the same size.

As for the method of heat transfer, it also includes a convection and thermal radiation.And the thermal inertia of them too small.

Aluminum + | Bimetallic -

About ability to withstand a lot of pressure (especially hammering)

Here aluminum disappoint - its working pressure numbers are not very impressive.Only 6 to 16 (some models up to 20) atmospheres, which may not be enough to withstand the pressure peaks in the central heating.And from water hammer and did not rescue - burst battery, like empty shells of nuts, and the apartment is a large hot flood.Therefore it is not worth the risk - in the high-rise buildings do not put aluminum radiators.

Bimetallic models with a solid steel core inside, to the pressure of high pressure well prepared.From 20 to 40 atmospheres - it is quite good.Even if the valve on the pump station will be in an accident on the track is closed or open with lightning speed, they will not hurt.It is the most reliable bimetal radiators with unstable pressure in the system is likely to occur when the water hammer.

This parameter is important in the event that you choose an apartment with radiators tsentrlizovannoy heating.If you choose these radiators for private home, this option is not a disadvantage for aluminum radiators, t. To. In the local heating network is not excessive pressure.

Aluminum + - | Bimetallic +

What better Bimetallic radiators or aluminum with respect to the coolant

Aluminium happy to enter into a variety of chemical reactions, so for him the water in the central heating - just"treasure."It in fact contains many chemical additives that from the walls of the battery may soon be almost anything, and not to stay - corrosion to eat them.Once the pH occurring in the system of hot water more than 8 units - expect trouble.But in the central heating to keep track of this indicator is not possible.And in the process of chemical reaction of aluminum gives off hydrogen, which is a fire hazard.So certainly we must constantly play off the air from such batteries.

steel pipes in the middle of the bimetallic radiator less demanding on the quality of water flowing through them.It became not so active chemicals like aluminum alloys.Corrosion, of course, and she gets up, but not so soon.In addition, manufacturers cover it with a special protective layer.And sometimes used stainless steel, but it is quite expensive.But in any case, a bimetal radiator is protected from too active chemical coolant.The only danger - getting into the water of oxygen.That's when the steel starts to rust, and very quickly.

Aluminum - | Bimetallic +

maximum temperature coolant - at any radiators more?

logical question - often our batteries "burning fire" so as not will touch.So, aluminum can withstand hot water up to 110 degrees - is average.For bimetallic articles the figure somewhat higher - 130 degrees.Therefore, they are winning.

Aluminum - | Bimetallic +

And what safer, stronger and more durable?

again pulled into the leaders of the two metal radiators - because they combine the best qualities of each.Such devices are used for 15-20 years, at least (of course, we are talking about product quality trusted brands).Aluminum their counterparts, usually distinguished by half as much service life - up to 10 years.

Aluminum - | Bimetallic +

What is easier to mount?

both aluminum and bimetal sufficiently comfortable to install, as are lightweight (compared with the same cast iron).For they do not need fixing brackets are particularly powerful - even drywall can withstand such a low weight.If plastic pipes for mounting need only set of keys and fittings.Yet bimetallic battery easier to install - for steel pipes can not be subjected to strain, as opposed to aluminum - a soft metal.

Aluminum + | Bimetallic +

What is cheaper, which is more expensive

Price bimetallic radiators one-fifth or even one-third higher than that of instruments made of aluminum.This is quite a significant difference.It is for this reason, still not as widespread in our apartments bimetal products - not everyone is available.Bimetal devices have a higher flow resistance than aluminum.Therefore energy to pump the hot water need.That is, the higher the cost of operation.

And again, about four-fifths of the radiators of this type are brought to us from China.This, of course, does not mean that each of them is certainly bad, but sometimes makes you wonder.

Aluminum + | Bimetallic -

What are the radiators for some systems are more suitable

1. Now, review and compare the basic characteristics of the radiators, and conclusions can be done.To get started find out what is best radiators - aluminum or bimetal - for an apartment in an apartment building.It uses a central heating system.

This means that:

  • pressure in the system can vary dramatically, reaching the transcendent values.There are hammering.
  • temperature will not be stable, sometimes greatly varying during the heating season, and even day.
  • composition of the coolant is not very clean.It has chemical impurities and abrasive particles.One can hardly speak of a pH less than 8 units.

For all these reasons, we can forget about aluminum batteries.Because they destroy the central heating system.If galvanic corrosion will not eat, then the pressure will finish with the temperature.A hammer will do the latter, "control shot".Therefore, choosing from two types of heat sinks (aluminum or bimetal), only at the last stop.

2. Now consider the heating system installed in a private home.Good operating boiler produces constant slight pressure of no more than 1.4 - 10 atmospheres, depending on the boiler system.Pressure surges, and the more water hammer, is not observed.Water temperature is also stable, and its purity is not in doubt.It will not have any chemical impurities, pH can be measured always.

Therefore, in such an autonomous heating system and aluminum radiators can be put - these devices will work fine.They will cost inexpensive, have excellent heat dissipation design their attractive.In stores you can pick up the battery, made in Europe.It is preferable to choose a model made by casting.Bimetallic battery is also suitable for those who live in their own home.If you have the desire and enough money, you can put them.

Just remember that a lot of fakes on the market.And if the model (either aluminum or bimetal) differs suspiciously low price, it is already possible to guard.Not to be trapped, make sure that on each section, and packaging (high-quality and full-color) was a manufacturer's mark.

Video: Installation of aluminum and bimetal radiators

  • reviews bimetallic heating radiators
  • Reviews of aluminum radiators

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What better Bimetallic radiators
What Bimetallic radiators better - sectional or monolithic, truly bi-metal or polubimetallicheskie
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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
What better radiators
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The specifications and properties of aluminum radiators
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