Isolierung der oberen Brandschutztür von De Dietrich 0325311

The upper fire door insulation is a thermal barrier installed on the upper section of a boiler's fire door. This insulation helps reduce heat loss, improve energy efficiency, and protect external surfaces from excessive temperatures. Over time, insulation can become compressed or damaged, so replacing it during boiler servicing is recommended. Using the correct insulation part ensures proper fit and maintains the door's sealing properties.