Schlösser is one of the leading Polish manufacturers of heating accessories. Our flagship products are: thermostatic heads and thermostatic valves for many types of radiators, offered in various colours and textures. Schlösser heating accessories are a perfect choice for everyone willing to make their radiators original and energy efficient as well. more
Certyfikat Keymark
Thursday, 7 March 2019

KEYMARK – Certificate

We are pleased to announce that the thermostatic valves and thermostatic heads of the Diamant series available in the Schlosser assortment received the KEYMARK * certificate !!!
Certificate No. 011-6T0038 is shown in the register:
* Keymark is the result of a rigorous system of voluntary certification issued by CEN and CENELEC European Standardization Committees (
The basis for certification is to assess the compliance of products with the PN-EN 215:2019 standard and a comprehensive audit of the production plant, processes and company procedures related to factory production control, carried out through a notified laboratory. Keymark also guarantees consumers the assurance that all requirements of European standards related to safety, health and environmental protection have been met.