Abstract: According to the invention there is provided a temperature-controlled system for at least one temperature controlled space having at least one closeable opening leading to a non-temperature controlled space, a closing element having an open or closed state filling the opening, and an open/closed sensor connected with said closing element for indicating an open/closed state of the closing element; heating-cooling supply means in the temperature controlled space for supplying heating-cooling thereto; temperature controlling means in the temperature controlled space in operative engagement with the heating-cooling supply means, for controlling the heating-cooling supply therein, and an operative connection from the open/closed sensor to the temperature controlling means for stopping supply of heating/cooling when the closing element is open, and wherein the operative connection includes a radio frequency transmitter coupled to the open/closed sensor, and a radio frequency receiver tuned to the radio frequency tr