I bought a warm one for a new building six months ago. They offered a discounted installation, and I agreed. When everything was installed well, the floor became very comfortable. After six months, the floor stopped warming. A specialist was called, and the cause of the problem was found. The specialist said that it was not mounted correctly. I turned to the sellers, the warranty was refused due to incorrect installation of the floor (although, as I understand it, they recommended trusted specialists)...