Among aluminum radiators, there are devices with different heat transfer rates. The higher it is, the smaller the radiator needs to be bought and, naturally, the cheaper it will cost.
See online calculator - Thermal Radiator Calculator.
Aim for at least 175 W per section, ideally 185 W per section. This is for aluminum. For a smaller bimetal: better than 175 W, but at least not less than 165 W.
According to approximate estimates, 100 watts of heat are needed per 1 square meter of the room. But this is a very conditional formula.
You can install different radiators, depending on the budget and the desired effect, but do not save!
In anticipation of cold weather (we hope it will not be soon) we will talk about radiators, we will tell you all the pros and cons, so radiators are of the type:
2. Aluminum (installed by the developer in almost all new buildings)
3. Cast iron
1, 2 type - we will immediately exclude, since there are more minuses than pluses.
3. Cast iron radiators - conditionally they can be divided into conventional or modern style radiators and retro style radiators.
They are able to work for at least 50 years.
Cast iron is chemically passive, so it is too tough for corrosion.
Radiation warms up a room with high ceilings well.
When heating is turned off, the batteries remain hot for a long time.
Low price (except for models made by artistic casting).
Large weight and dimensions make it difficult to transport and install.
Radiators need a solid mount. * Large volume of coolant.
Cast iron is a brittle metal. Water hammer is capable of breaking a cast iron battery.
4. Bimetallic Radiators These radiators combine a tubular steel core and an aluminum shell. Basically, they are made of sections, an even number.
Inertia is practically absent, heat transfer is great.
Bimetal can withstand increased pressure and water hammer.
The amount of hot water is small.
Installation is simple, the design is modern.
Heat dissipation is lower than that of aluminum radiators.
Uniform heating of rooms. In this sense, the design of the radiators is important. For example, steel panel radiators are arranged in such a way that the air ducts are directed upwards, thus creating a heat curtain for the outside air from the windows. But precisely because of this, the far corners of the room can be heated a little worse.
If your favorite chair, where you like to read a book on cold winter evenings, is located in the corner of the room, and for the sake of radiators you are not ready to rearrange, it is better to choose aluminum or bimetallic devices. Their upper part of the sections is rounded and directed to the center of the room, so its entire perimeter is well heated.