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RADIK RC VKU

Energy saving panel radiator with controlled flow with right or left bottom connection

Energy saving panel radiator with controlled flow with right or left bottom connection

RADIK RC VKU represents a significant innovation in the world of heating. It is the first radiator with controlled flow which enables a full closing of the water flow through the back panel of the radiator. Therefore it is possible to use a higher share of radiant heat from the front panel for 87% of the heating season, achieve the desired thermal comfort at a lower air temperature in the room and thus save up to 15% of the annual heating costs.

What is the difference between a radiator with controlled flow and other panel radiators?

RADIK RC VKU is a panel radiator in the version RC and in the version VENTIL KOMPAKT which allows a right or left bottom connection to the heating system with a forced circulation. There are no hangers welded at the back side of the radiator therefore the radiators in types 20, 21, 22 and 33 can be turned.

Benefits of radiators RADIK RC


The cost saving up to 15% of your average
annual heating costs.

Eco-friendly operation.


For most of the heating season you can heat only with the front panel. 

Full heat output is needed for only 3-5 weeks in the season.


Faster warming of the front panel.

Better utilization of radiant heat for a higher thermal comfort.


Reduction of heat losses of the wall behind the radiator.

Power limit up to 73% when heating only with the front panel.

Revolutionary Technology of Controlled Flow

Are you interested in seeing how the revolutionary technology of controlled flow works? Watch a short video:

More information
S-CONTROL logoSystem for low energy heating

Technical Data

Height (H) 300, 400, 500, 600, 900 mm
Length (L) 400, 500, 600, 700, 800, 900, 1000, 1100, 1200, 1400, 1600, 1800, 2000, 2300, 2600, 3000 mm
Depth (B)
- Type 20 RC VKU 66 mm
- Type 21 RC VKU 66 mm
- Type 22 RC VKU 100 mm
- Type 33 RC VKU 155 mm
Connecting pitch 50 mm
Connecting thread 6 × G½ inside
Highest allowed working pressure 10 bar
Highest allowed working temperature (°C) 110 °C
Radiator connection right or left bottom
Pressure Loss

In case of two-pipe heating system it is necessary to calculate the correct level of valve presetting and specify this in the project documentation to ensure a proper function of the heating system. This must be kept by the installer during installation of the heating system.

In case of one-pipe heating system it is necessary to set the valve at level 6. For adjusting the required mass flow in the radiator we recommend to use the compact connecting fitting with a fixed or adjustable flow volume of water in the radiator.


Heat output [W]

Heat output calculated to ∆T= 50; (t1/t2/ti = for 75/65/20 °C)

Type 20 RC VKU Type 21 RC VKU Type 22 RC VKU Type 33 RC VKU
Height [mm] Height [mm] Height [mm] Height [mm]
Length [mm] 500 600 900 300 400 500 600 900 300 400 500 600 900 300 400 500 600 900
400 335 391 559 298 375 447 515 702 386 486 581 672 925 552 695 832 962 1331
500 419 489 699 373 469 559 644 877 483 608 726 840 1157 690 869 1040 1203 1664
600 503 587 839 447 562 670 773 1052 580 730 871 1007 1388 827 1043 1247 1444 1997
700 587 685 979 522 656 782 902 1228 676 851 1016 1175 1619 965 1217 1455 1684 2330
800 670 782 1118 596 750 894 1030 1403 773 973 1162 1343 1850 1103 1390 1663 1925 2662
900 754 880 1258 671 843 1005 1159 1579 869 1094 1307 1511 2082 1241 1564 1871 2165 2995
1000 838 978 1398 745 937 1117 1288 1754 966 1216 1452 1679 2313 1379 1738 2079 2406 3328
1100 922 1076 1538 820 1031 1229 1417 1929 1063 1338 1597 1847 2544 1517 1912 2287 2647 3661
1200 1006 1174 1678 894 1124 1340 1546 2105 1159 1459 1742 2015 2776 1655 2086 2495 2887 3994
1400 1173 1369 1957 1043 1312 1564 1803 2456 1352 1702 2033 2351 3238 1931 2433 2911 3368 4659
1600 1341 1565 2237 1192 1499 1787 2061 2806 1546 1946 2323 2686 3701 2206 2781 3326 3850 5325
1800 1508 1760 2516 1341 1687 2011 2318 3157 1739 2189 2614 3022 4163 2482 3128 3742 4331 5990
2000 1676 1956 2796 1490 1874 2234 2576 3508 1932 2432 2904 3358 4626 2758 3476 4158 4812 6656
2300 2569 2962 2222 2797 3340 3862 3172 3997 4782 5534
2600 2904 3349 2512 3162 3775 4365 3585 4519 5405 6256
3000 3351 3864 2898 3648 4356 5037 4137 5214 6237 7218

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