Door cord 30x30 De Dietrich 7734822

The door cord 30x30 is a sealing gasket or rope used to create a tight seal around boiler doors or access panels. This cord helps prevent heat loss and air leaks, improving the efficiency of your heating system. The 30x30 size indicates its dimensions, making it suitable for various boiler models that require a specific thickness. Over time, door cords can become brittle or compressed, leading to reduced performance. Replacing the old cord with this new one restores the seal, reduces energy waste, and ensures safe operation by containing flue gases.