GE JGP985 Owner's Manual & Installation Instructions page 21

MINIMUM SPACING REQUIREMENT
When installing a double bay downdraft cooktop
in combination with another downdraft cooktop,
maintain the minimum spacing between units as
shown below. Installing them too close will affect
cooking performance.
18"
45.7 cm
Installation Instructions
PREPARATION
"
4 ⁄
3
8
11.1 cm
INSTALLING CABINETS OVER
1
YOUR COOKTOP
25"
(63.5 cm)
36"
(91.4 cm)
Avoid placing cabinets above the cooktop unit,
if possible, in order to reduce the hazards caused
by reaching over heated surface units.
If the cabinets are installed above the cooktop,
allow a minimum 30" (76.2 cm) clearance
between the cooking surface and the bottom
of the cabinet.
A non-combustible material must be installed on
the under side of the cabinet. Use a flame retardant
millboard at least 1/4" (6.3 mm) thick, or gypsum
board at least 3/16" (4.7 mm) thick, covered with
28 gauge sheet steel or 0.020" (.5 mm) thick
copper. The maximum depth of cabinets above
the cooktop is 13" (33 cm).
EXCEPTION: Installation of a listed microwave
oven or cooking appliance over the cooktop shall
conform to the installation instructions packed
with that appliance.
Working areas adjacent to the cooktop should have
an 18" (45.7 cm) minimum clearance between the
countertop and the bottom of the cabinet. If the
clearance is less than 18" (45.7 cm), the adjacent
cabinets should be at least 8" (20.3 cm) from the
side of the cooktop.
21
30" min
(76.2 cm)
13"
(33 cm)
30"
18"
(76.2 cm)
(45.7 cm)
8" min to wall
(20.3 cm)
8" min to wall
(20.3 cm)