Abstract: An adapter and adapter system for connecting a female end of a first chimney portion to a male end of a second chimney portion. The adapter includes a first radial adapter portion with a first inner surface and a first outer surface extending along a first axis and wherein the first inner surface and the first outer surface are substantially coaxial. The adapter further includes a first locking interface protruding outward from the first outer surface and configured to engage with a first locking interface of the first chimney portion and a second locking interface protruding inward from the first inner surface and configured to engage with a second interlocking interface of the second chimney. The first outer surface of the adapter is configured to be received within the female end of the first chimney portion and the inner surface is configured to receive the male end of the second chimney.

Abstract: The present disclosure envisages an air grille. The air grille comprises a front face and a duct face end. The duct face end is in the opposite of the front face. A plurality of flaps are configured on the duct face end, wherein the flaps are capable of collapsing. During shipping the flaps are collapsed whereas before installation the flaps are uncollapsed to facilitate containment of an air filter. The air grille has first thickness when the flaps are collapsed and second thickness when the flaps are uncollapsed, wherein the first thickness is less than the second thickness.

Abstract: The present disclosure envisages an air grille. The air grille comprises a front face and a duct face end. The duct face end is in the opposite of the front face. A plurality of flaps are configured on the duct face end, wherein the flaps are capable of collapsing. During shipping the flaps are collapsed whereas before installation the flaps are uncollapsed to facilitate containment of an air filter. The air grille has first thickness when the flaps are collapsed and second thickness when the flaps are uncollapsed, wherein the first thickness is less than the second thickness.

Abstract: An adapter and adapter system for coupling a female end of a first chimney portion to a male end of a second chimney portion. The adapter includes a first radial adapter portion, wherein a first inner surface and a first outer surface of the first radial adapter portion are coaxial. The adapter further includes a first locking interface protruding outward from the first outer surface and configured to engage with a first locking interface of the first chimney portion. The adapter further includes a second radial adapter portion with a second inner surface and a second outer surface extending along the first axis and a second locking interface protruding inward from the second inner surface and configured to engage with a second interlocking interface of the second chimney.

Abstract: An adapter and adapter system for connecting a female end of a first chimney portion to a male end of a second chimney portion. The adapter includes a first radial adapter portion with a first inner surface and a first outer surface extending along a first axis and wherein the first inner surface and the first outer surface are substantially coaxial. The adapter further includes a first locking interface protruding outward from the first outer surface and configured to engage with a first locking interface of the first chimney portion and a second locking interface protruding inward from the first inner surface and configured to engage with a second interlocking interface of the second chimney. The first outer surface of the adapter is configured to be received within the female end of the first chimney portion and the inner surface is configured to receive the male end of the second chimney.