Design Information
G a s Downdraf t Cooktop
Advance Planning
The combined installation of a downdraft vent and cooktop require careful consideration.
Countertop Requirements:
The countertop must have a deep flat surface to accommodate the cooktop and the vent. Countertops with a rolled front edge and backsplash may not provide the flat surface area required.
Base Cabinet Requirements:
This installation requires a 24" min. deep cabinet base. The cabinet must be at least 36" wide.
Clearances
•The downdraft system with blower, motor and ductwork will occupy the cabinet below the cooktop. Drawers cannot be installed below this cooktop.
•Refer to “Dimensions & Clearances” for information on appropriate placement and necessary clearances when planning installa- tion.
•Avoid placing cabinetry directly above the cooktop when possible.
•If cabinetry is used above cooking surface:
–Use cabinets no more than 13" deep.
–Maintain 30" minimum clearance between cooktop and unprotected cabinets directly above cooktop.
–If clearance is less than 30", protect cabinet bottoms with
least 1/4" thick or gypsum board at least 3/16" thick covered with 28 gauge sheet steel or .02" thick copper.
–Clearance between cooktop and protected cabinetry must not be less than 24".
EXCEPTION: Installation of a listed micro- wave oven or cooking appliance over the cooktop shall conform to the installation instructions packed with that appliance.
•Installation must conform with local codes.
In the absence of local codes, the gas cooktop must comply with the National Fuel Gas Code, ANSI Z223.1, latest edition.
Ductwork Advance Planning
Prepare ductwork to vent to outdoors:
•Use the shortest and straightest duct run possible:
–Duct run should not exceed equivalent length of 150 feet.
–Refer to “Duct Fittings” chart to calculate equivalent length for various duct configurations.
•The downdraft blower system is designed to use
•Ductwork MUST be vented to the outside– never into a crawl space, attic or other enclosed space.
•Determine the need for a wall cap or roof cap. Order the cap in advance.
Gas and Electrical Locations | • Refer to “Power Supply Locations” page 8 for |
Plan the placement of the electrical outlet and | details. |
gas carefully. Gas and electrical outlets cannot |
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be placed on the back wall of the cabinet |
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because it may interfere with the downdraft |
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plenum. |
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