Adaptive chimney duct

A cooking appliance ventilation system, comprising:

• a body having a top section;
• a cavity housing disposed within the body, the cavity housing having a top portion, wherein a space is defined between the top portion of the cavity housing and the top section of the body;
• a ventilation plate disposed between the body and the cavity housing;
• and
• a chimney duct assembly disposed in the space between the cavity housing and the body, the chimney duct assembly comprising:
• a chimney base having a sidewall defining an interior, wherein the chimney base defines an inlet on a bottom section thereof;
• a first pair of biasing flanges coupled to the chimney base and extending outward from the sidewall, the first pair of biasing flanges operably engaging with the ventilation plate and biasing the chimney base towards the cavity housing;
• a chimney top cover disposed over and operably coupled to the chimney base, the chimney top cover having a covering portion and a wall portion, wherein an outlet is defined between the chimney base and the chimney top cover, the outlet being in fluid communication with the inlet;
• and
• a second pair of biasing flanges coupled to the wall portion and extending inward from the wall portion, the second pair of biasing flanges biasing the chimney top cover towards the body and away from the chimney base to adjust to a height of the space between the cavity housing and the body.

A ventilation system for a cooking appliance, comprising:

• a body having a top section;
• a cavity housing disposed within the body, the cavity housing having a top portion and defining a cooking cavity;
• and
• a chimney duct assembly disposed between the cavity housing and the body, the chimney duct assembly comprising:
• a chimney base having a sidewall extending from a bottom section, wherein an inlet is defined by the bottom section and configured to align with a cooking cavity outlet defined by the cavity housing to permit an airflow from the cooking cavity, and wherein the chimney base includes upper biasing flanges extending outward from the sidewall, the upper biasing flanges operably engaging with the top section and biasing the chimney base towards the cavity housing;
• and
• a chimney cover disposed over and operably coupled to the chimney base, the chimney cover including a covering portion and a wall portion extending from the covering portion, wherein the chimney cover includes lower biasing flanges extending inward from the wall portion, the lower biasing flanges biasing the chimney cover towards the top section, and wherein a venting outlet is defined between the chimney base and the chimney top cover, the venting outlet being in fluid communication with the cooking cavity outlet and the inlet for venting the cooking cavity.