Abstract: An interchangeable duct seal is provided. The interchangeable duct seal includes a first panel, the first panel having a first support structure and a first material attached to the first support structure; and a brace configured for securing the first panel to a structure; wherein the first panel includes a first opening and is configured to connect to a first duct and/or allow the first duct to pass through the interchangeable duct seal. The interchangeable duct seal may also include a second panel or multiple panels. Related kits and methods are also provided.

Abstract: A flexible duct having a hollow tube shape. The flexible duct includes at least one end, and an opening defined by a first edge of the at least one end and forming a duct inlet or duct outlet. The at least one end includes at least a first attachment and a second attachment, and the first attachment and the second attachment are different. The first attachment and the second attachment can be used independently of one another to connect the at least one end to a first inlet or a first outlet. In one embodiment, a flexible duct includes an attachment that is a cuff. In another embodiment, a connector includes two different attachments and the connector can be affixed to a flexible duct end. In another embodiment, a method includes providing a flexible duct with different attachments at one end of the flexible duct, and flowing air through the flexible duct. In a further embodiment, a method includes providing a connector having two different attachments.

Abstract: A multi-use product that includes several layers, in which the outer layers include a reinforced polymer and an interior insulation layer, wherein all the layers are adhered. A method of making and using is also disclosed.