Radiators

You already have everything you need to estimate the required size of radiator. The radiator width and height are determined by the window width and height of the sill. You now need the operating temperature of the heat generator and the installation depth and type of radiator.
If you use a normal low-temperature boiler, you can assume a design temperature of 70/55 °C (i.e. 70 °C supply and 55 °C return temperature). Modern condensing boilers and heat pumps regularly produce a design temperature of 55/45°C or 45/35°C. With all these values, you can now consider the layout and determine the right radiator for your property. You can determine the corresponding heating capacities of the individual radiators with our performance calculator.

As a general rule, radiator covers supplied by the manufacturer do not lead to heat losses. If you would like to visually enhance your radiator, it is essential to consider installing a radiator that meets your requirements. Nowadays, there are many attractive and beautifully designed radiators. Flat radiators are available with flat fronts, rounded edges and in a wide range of colours.

When installing under window sills, 100% power output can only be guaranteed if the air circulation is not impaired, i.e. there must be sufficient clearance above and below the radiator.

In practice, the upper distance is determined according to the formula installation depth of the radiator +10%. Top Clearance TC = D x 1.1. If this value cannot be achieved for structural reasons, a reduction in performance is to be expected.

No single radiator type is efficient in every installation situation. The area of application and usage will define which system will be the most efficient.

In bathroom applications, additional benefits such as towel drying and ease of use are often the main focus. If you are replacing a radiator, find the correct models for your new heat source and calculate the correct output with our output calculator. It shows you the right models of each radiator for your required target output, so that the desired room temperature is reliably reached.

Caution: This output calculator does not replace the standard-compliant heating load calculation.

We do not recommend that you paint radiators yourself, as this can lead to reduced heat output and possibily to harmful vapors and the so-called fogging-effect. It also invalidate the product's warranty. Our radiators are electrophoretically primed and finished with a particularly resistant and entirely odour-neutral stove enamel finish. You can choose from a range of fashionable colours.

There are differences in the design depending on the type of radiator. With conventional heating systems, the entire system is operated with hot water. Purely electric radiators, on the other hand, are not connected to a system, but are individually filled with a heat transfer oil or water/glycol mixture, or they are radiators that are heated by means of a heating mat or film.

The heating system itself can be operated with a wide variety of fuels, such as gas, wood, oil or district heating. The heat generated is fed into the system and the water is heated in order to then be transported to the radiators. There the heat is released into the room air.

Determining output is a science in itself, because various influencing factors must be considered. In principle, radiators must supply the room with exactly the amount of heat that is lost through exterior walls, windows, etc. The surface area of the respective external components, the thermal insulation value, the room and outdoor temperature and much more are crucial for this. Precise output can only be determined by your installer calculating the heating load. However, we have compiled some average values per square metre of living space to provide an estimated calculation.