Important note regarding installation:
Using the correct heating water is crucial to the system’s service life

Our radiators are manufactured from high-quality materials and are designed to last for decades. To ensure this longevity, there is one absolutely critical requirement during installation: the correct composition of the heating water.


We would like to emphasise that our radiators must only be filled with fully demineralised water (demineralised water) WITHOUT inhibitors. This complies with the strict requirements for a DIN-compliant installation.


Why is normal tap water or water containing additives harmful?

Normal drinking water naturally contains minerals and salts (e.g. limescale). Furthermore, some plumbers add chemical additives, known as inhibitors (corrosion inhibitors), to the water. When it comes into contact with the seals in our radiators, the wrong type of water leads to a disastrous chemical and physical reaction.

The consequences of non-compliance (unsuitable water / inhibitors)

If the system is not filled with pure, fully demineralised water, the following will occur over time:


Consequences of non-compliance (incorrect water / inhibitors)

If the system is not filled with pure, fully demineralised water, the following will occur over time:


  1. Salt crystallisation: The salts in the water and the chemicals in the inhibitors are deposited on the radiator seals, where they crystallise.
  2. Damage to the seals: These hard salt crystals act like tiny blades or wedges. They damage the structure of the seals and cause them to separate slightly.
  3. Leakage: After a few years (often after 3 to 5 years), the radiator starts to leak at the fins or connections, as the water forces its way through the seals that have been damaged by the crystals.



salts crystallise out and damage the seals.

Who is liable for this type of damage?

Please understand that we cannot accept any warranty or guarantee for damage that is clearly attributable to salt crystallisation on the seals.