1. Is there a possibility of a self-help repair of paint damage of RADIK and KORALUX radiators?
    Touch up paint - CRAMER

    Touch up paint with a brush is intended for repairs of minor damages of paint on the radiator surface.

    Ceramic spray paint

    Ceramic spray paint is intended for repairs of minor damages of paint on the radiator surface.

  2. How does the position of the duct of inlet and outlet water change with Ventil Kompakt radiators, depending on the location of the bottom connection right, left or centre?

    Bottom right connection:

    model RADIK VK by types 10, 11, 20, 21, 22, 33

    model RADIK VKU by types  20, 21, 22, 33

    model RADIK COMBI VK by type 22

    Bottom left connection:

    model RADIK VKL by types 10, 11, 20, 21, 22, 33

    model RADIK VKU by types  20, 21, 22, 33

    Bottom midle connection:

    model RADIK VKM by types 10, 11, 20, 21, 22, 33

    Important for Practice:

    Connections for the pipeline of water-in and water-out have the pitch 50 mm and the connection for water-in is always the one located farther from the valve – see icons:

  3. The mounting template for RADIK Ventil Kompakt radiators consists of four parts from which a plumber must select when ordering. What matters are to be considered?

    The mounting template can be used for all models of panel radiators of the company KORADO with the bottom connection with the pitch of 50 mm. These are the following models of panel radiators:

    • RADIK VK

    The mounting template consists of two basic parts - a metal sheet and an a joining component. For each of them, there is a choice from two items:

    The choice of a "Metal sheet":

    Depends on the model and type of assembled radiators.

    Metal 100Metal 155
    Designed for all models (with the exception of the type VKU 33 - if the assembly is with the bottom left connection) For all models without exception

    The choice of a "joining component":

    Depends on the type of fittings for the radiator connection.

    The joining component with internal threads G½The joining component with external threads G¾
    for fittings with the internal connection thread G ½, for example a closing threaded connection (if the conduct pipe of black steel is used) for fittings with a cap nut with internal thread G¾, for example a compact fittings of the type "H" * (if the conduct pipe of copper, plastic or a combination of plastic with metal is used)

    * Note:

    For the assembly, 2 pieces of reduction ½ "to ¾" are used, which are necessary to connect radiators with a connection fittings.

    Important for practice:

    See the instructions for use of the mounting templates

  4. How to replace an old column radiator with a panel radiator?

    For a quick replacement of column cast iron or steel radiators with the connecting pitch 500 mm, the model RADIK KLASIK - R is designed. The size of the new radiator can be easily found in this table. Here you will find an adequate size of the new radiator, provided that the parameters of the heating system or building (insulation, new windows, etc.) were not changed.

  5. Is it possible to use heat cost allocators on panel radiators?

    Heat cost allocators are normally used on panel radiators. The actual installation of the allocator on the radiator should be performed by a professional company.

  6. Is it possible to determine the size of radiators on the basis of dimensions of the room?

    Determining the size of radiators on the basis of internal room volumes ("via cubic meters") was very popular in the past because it was a very simple calculation. Earlier designs of buildings allowed the use of this procedure, because the differences in thermal-technical properties of the buildings were significantly smaller than nowadays. Nowadays, when heat cost reductions (thermal insulation, passive houses, etc.) are the priority, such procedure cannot be used anymore. The reason is very simple - a significant inaccuracy. This can then lead to a wrong calculation - under / over-dimensioning of the heating system. The possible consequences of the wrong system calculation are the increase in investment costs and inefficient and uneconomical operation. Therefore, it is strongly recommended to process the calculation of heat losses, which serves as a basis for the size of new radiators.

  7. How to determine the heat output for a different temperature gradient?

    The heat output of each radiator varies depending on the temperature gradient. According to EN 442 (radiators), the heat output must be measured by an independent accredited laboratory for the thermal gradient of 75/65/20°C. This means the inlet water at a temperature of 75°C, the outlet water at a temperature of 65°C at an air temperature of 20°C in the heated room. If these temperatures change, a change in the heat output of the radiator will follow. For this reason, we offer in our catalogues the heat outputs of radiators always for several commonly used temperature gradients. 

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