Downdraft Vents
A downdraft vent sits behind or beside a cooktop and pulls smoke and steam down and out through ducting under the floor or cabinets, so there is no hood above the cooking surface — useful on an island where you want a clear sightline. Many rise out of the counter when you switch them on and retract when you are done. A downdraft range hood captures less than an overhead hood, especially from tall pots on the back burners, so it suits cooktops with moderate output. Check which cooktops it is designed for, the rise height, the blower location and the duct route below.
All Make Appliance lists 21 downdraft vents from 7 brands, including Zephyr, Broan, GE and Bosch. 9 of them are in stock right now, and every listing below shows its current availability. Free NJ/NY-metro delivery on orders over $499.

36" Retractable Downdraft System with Interior Blower Motor
Model: UXD8636DYS
36" Retractable Downdraft Ventilation System

500 Series Pull-out Hood
Model: HUI50351UC
500 Series Pull-out Hood 36''
Model: HUI56551UC
36" Lift Downdraft
Model: DLIE36ASX
30" Sorrento Downdraft
Model: DD1E30AS
24-Inch Built-In Power Pack Insert w/ Easy Install System, 300 Max Blower CFM
Model: BBN1243SS
30-Inch Built-In Power Pack Insert w/ Easy Install System, 300 Max Blower CFM
Model: BBN1303SS
Elite 36-Inch Downdraft Range Hood, 600 Max Blower CFM, Cover
Model: 273603
30" Retractable Downdraft Ventilation System

30" Treviso Downdraft
Model: ZTVE30AS
36" Treviso Downdraft
Model: ZTVE36AS
Rise 30" Downdraft Hood
Model: ERS630S1
Rise 36" Downdraft Hood
Model: ERS636S1
30" Lift Downdraft
Model: DLIE30ASX
36" Sorrento Downdraft
Model: DD1E36AS
Elite 30-Inch Downdraft Range Hood, 600 Max Blower CFM, Cover
Model: 273003
Universal 30" Telescopic Downdraft System
Model: UVD6301DPBB
Universal 30" Telescopic Downdraft System
Model: UVD6301SPSS
Universal 36" Telescopic Downdraft System
Model: UVD6361DPBB