Abstract: A roof hatch comprising at least one thermal resistant sheet having one or more sections is disclosed. The one or more sections are configured thereon to curb heat transfer. The roof hatch further comprises a frame to be installed on a roof and a hatch cover is configured for housing the thermal resistant sheet. The hatch cover and the frame are connected by a movable joint which enables the hatch cover to collapse over the frame. A sealing element is provided on at least a portion of the hatch cover. The thermal resistant sheet is held by the hatch cover by a temporary joint, a permanent joint or a combination thereof. The thickness of the hatch cover is in the range of 0.060 inches to 0.090 inches. The length of the one or more sections have a length which is less than a length of the edge.

Abstract: An adapter for connecting a duct and a diffuser includes a base configured to be coupled to the diffuser and having a central opening. The adapter also includes a radially inner collar directly coupled to the base and extending circumferentially about a longitudinal axis of the central opening. The adapter also includes a radially intermediate collar directly coupled to the base, extending circumferentially about the longitudinal axis, and disposed radially outward from the radially inner collar. The adapter also includes a radially outer collar directly coupled to the base, extending circumferentially about the longitudinal axis, and disposed radially outward from the radially intermediate collar. A height of the radially intermediate collar, measured from the base upwardly, is greater than a height of the radially outer collar, and less than a height of the radially inner collar.

Abstract: An adapter for connecting a duct and a diffuser includes a base configured to be coupled to the diffuser and having a central opening. The adapter also includes a radially inner collar directly coupled to the base and extending circumferentially about a longitudinal axis of the central opening. The adapter also includes a radially intermediate collar directly coupled to the base, extending circumferentially about the longitudinal axis, and disposed radially outward from the radially inner collar. The adapter also includes a radially outer collar directly coupled to the base, extending circumferentially about the longitudinal axis, and disposed radially outward from the radially intermediate collar. A height of the radially intermediate collar, measured from the base upwardly, is greater than a height of the radially outer collar, and less than a height of the radially inner collar.