Pressed ventilation bends are used for spiral ducting and flexible ducts. Seam welding provides air-tightness class D, without additional sealants. EPDM double lip rubber seal provides air-tightness class D for ventilation and heat recovery installations. In order to connect the fitting with ventilation duct, we recommend inserting the bend into the duct. The design of the pressed bends gives lower resistance and pressure drops.
