A downdraft cooktop contains a built-in ventilation system that removes odors, smoke and steam through the cooktop surface, eliminating the need for hood ventilation. Downdraft ventilation systems are available for all types of cooktops, including electric, gas, modular and ceramic.
Most downdraft cooktop designs feature a vent built directly into the surface between the burners. Another downdraft design features a moveable vent placed at the back of the cooktop, which can be raised and lowered. As of 2014, downdraft cooktops can be directly installed into a countertop or included in the cooking surface of a free-standing range. The exhaust ratings and specific control features for downdraft cooktops vary by manufacturer.