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Air duct accessories and fan »check valves CATA FANS »Axial bathroom fans» E-100 fans CATA FANS »Axial bathroom fans» B PLUS fans CATA FANS »Axial bathroom fans» X-MART fans CATA FANS »Axial fans E-GLASS / DISPLAY Description of goods Damper 100mm 01990097, Cellophane for X-MART 10 fans, B-10 PLUS / B, E-100, CATA, reverse Backdraught shutter to fans: B-10 PLUS / B / C X-MART 10 a E-100. The non-return valve prevents air from flowing back into the room when the fan is off. It helps in the fight against dust and odors from the footboard, or pipes and also partly against the cold, especially if the fan is installed in the outer perimeter wall of the room. When the fan is switched on, the non-return valve wings will bend and allow the desired air flow out of the room. Plastic body, cellophane membranes for easy extraction. Replaces the predecessor BLIND 10. 01990097 VALVULA ANTIRETORNO X-MART 10; B10-Plus / B / C; E-100 backflow valve backdraught valve The package includes a simple installation guide. The damper is not compatible with other than the listed fan models, or with other brand fans.