The issue of replacing the radiator occurs due to various reasons. Expires life, poor heat dissipation, do not fit in the new design of the apartment.
And since the market offers a huge variety of radiators, making the right choice is not an easy task.
But in fact, choose not too difficult. Radiators are offered basically four types, depending on the manufacturing material. This cast iron, aluminum, steel and bimetal.
Cast iron radiators
Classic cast iron radiators continueenjoy strong demand in the market. Due to a serious competitive advantages, they are widely used in central heating systems of apartment buildings.
The biggest service life - up to 50 years, long-term cooling, resistance to aggressive coolant and, most importantly, low cost - allow them to remain "afloat".
But along with the obvious advantages there areserious shortcomings: a lot of weight, one section weighs about 7 kg, low heat output - a maximum of 160 W / section is important in homes with heat meters, outdated design of traditional radiators.
Aluminium radiators more expensive than iron, but have a higher heat transfer - more than 190 watts per section, have a low weight and good design. Quickly heat up, but quickly cooled.
When installing aluminum radiators can not use copper or brass fittings
Because virtually no coolant aggressivenesssuitable for use in homes with central heating. These batteries are sensitive to waterhammer and are not used in heating systems with steel pipes.
A good choice for private homes and cottages atthe use of plastic pipes and antifreeze as coolant. Also for the normal operation of the aluminum panels require good thermal insulation of the walls.
As an alternative to cast iron, forapartment buildings with central heating, bimetal radiators are ideal. As they do not differ in appearance from aluminum, but their performance is much higher.
Bimetallic radiators consist of aluminum tubes with steel fins inside. This design allows to withstand immense pressure - fracture occurs at 170 atmospheres.
Radiators virtually insensitive to waterhammer, have high heat, low inertia, can continuously work under high pressure, resistant to coolant.
Steel panel-type radiators made of steel with two sheets of punched indentations welded together. On top covered by a polymeric layer of paint.
Do not widespread due to low corrosion resistance, and a small operating pressure - no more than 6 - 8 atmospheres.
Steel radiators must always be filled with water, otherwise begin to rust
convector type radiators aresteel tube, brazed with thin ribs for increasing heat dissipation. Modern heaters are a good alternative to a bimetallic radiator, t. To. Have a lower price, but the same good looks.