Depending on the required room temperature, the thickness of sliding gate is 68, 92 or 120 mm. Gate is isolated by the polyurethane filler. Gate mechanism is made in such a way that at the time of opening, the gate goes up protecting the bottom rubber seal. The gate can be equipped with a lock and without it. Internally, an emergency opening handle is foreseen. The gate for sub-zero rooms is produced with an easily replaceable heating cable, which prevents the gate from freezing. The cable is mounted to the door seal through the entire perimeter. In addition, the cable can be installed in the door frame.