Downdraft Cooktop Dimensions & Blower Clearance

How big is a downdraft cooktop?#

A downdraft cooktop is 30 or 36 inches wide overall, with a cutout of 28.5 to 29.75 inches on the 30-inch models and 34.5 to 35.75 inches on the 36-inch gas version. What sets it apart is below the counter — the table and clearances below cover both the surface footprint and the blower that hangs beneath it.

Downdraft cooktop dimensions by configuration#

Installation clearances for a downdraft cooktop#

• Cutout depth: 19–22 in in of countertop cutout depth a downdraft cooktop needs, since the vent sits behind the burners.
• Below-counter blower: 6–8 in in the downdraft blower drops below the countertop, deeper than a plain cooktop.
• Duct path: A downdraft cooktop ducts down through the cabinet and out the floor or rim joist, so plan the run before install.
• Pop-up clearance: 8–10 in in the telescoping vent of a downdraft cooktop rises above the surface when it runs.

Will your downdraft cooktop fit? Clearances and door swing#

A downdraft cooktop asks two questions your standard cooktop does not: how deep is the cabinet, and where does the duct go. On top, the countertop cutout is 19 to 22 inches deep because the vent sits behind the burners, so you need a countertop with that much depth to spare. Below, the blower drops 6 to 8 inches under the countertop — deeper than a plain cooktop — which eats into the cabinet or drawer directly beneath. The duct then runs down through the cabinet and out the floor or rim joist, so plan that path before you cut anything. When it runs, the telescoping vent rises 8 to 10 inches above the surface, so make sure nothing overhead blocks it. Confirm the below-counter space and the duct route first; the cutout width is the easy part.

Downdraft cooktop sizes by type: 30-inch electric downdraft, 36-inch gas downdraft, 30-inch induction downdraft#

The 30-inch electric downdraft is the classic radiant-glass island cooktop with a pop-up vent, using a 28.5-to-29.75-inch cutout and a 19-to-21-inch depth. The 36-inch gas downdraft widens the cutout to 34.5 to 35.75 inches and runs a touch deeper at 20 to 22 inches, giving sealed gas burners the room they need on a broad island. The 30-inch induction downdraft matches the electric footprint but swaps radiant elements for flush induction with an integrated vent, which keeps the glass surface easy to wipe. All three share the same below-counter demands — the 6-to-8-inch blower and the down-and-out duct — so the choice comes down to your fuel and burner style, not the footprint. Pick gas for the wide island, electric or induction for the flush 30-inch look.