Page. 7
Ventilation preparation
To prepare for the ventilation
1. Select hood and blower models:
•
For wall installations, the hood width must, at a
minimum, equal the width of the range/rangetop.
Where space permits, a hood larger in width than
the range/rangetop may be desirable for
improved ventilation performance.
•
For island installations, the hood width should
overhang the width of the range/rangetop by a
minimum of 3'' (76 mm) on each side.
2. Hood placement:
•
For best smoke elimination, the lower edge of the
hood should be installed 30'' (762 mm) above the
range cooking surface.
•
If the hood contains any combustible materials
(i.e. a wood covering), it must be installed a
minimum of 36'' (914 mm) above the cooking
surface.
3. Consider make-up air:
•
Due to the high volume of ventilation air, a source
of outside replacement air is recommended. This
is particularly important for tightly sealed and
insulated homes.
•
A qualified heating and ventilating contractor
should be consulted.
Installation clearances
Cabinet requirements
The appliance is a free standing unit. If the unit is to be
placed adjacent to cabinets, the clearances shown in this
section are required. The same clearances apply to island
installations, except for the overhead cabinets, which must
have a space wide enough to accept the island hood.
•
See the “Ventilation planning guide” for
recommended hood options. Due to the high heat of
the burners, installing a microwave oven with a
ventilation system over the appliance is not
recommended on any model other than the 30'' 5–
burner. Refer to OTR manufacturer’s installation
manual for clearances.
•
The gas and electrical supply should be within the
zones shown in the “Gas and electric locations”
section.
•
The shaded area behind the appliance indicates an
opportunity to discolor the back wall under certain
cooking conditions.
•
There must be a minimum of 5'' (127 mm) side
clearance from the appliance to combustible vertical
surfaces above the 36'' (914 mm) counter height.
•
Within the 5'' (127 mm) side clearance to combustible
vertical surfaces above 36'' (91.4 cm), the maximum
wall cabinet depth must be 13” (330 mm).
•
Wall cabinets within this 5'' (127 mm) side clearance
must be 18'' (457 mm) above the 36'' (914 mm) high
countertop.
•
The maximum depth of the cabinets hanging on either
side of the hood is 13'' (330 mm).
•
There is a 36'' (914 mm) minimum clearance required
between the top of the cooking surface and the
bottom of an unprotected cabinet. A 30'' (762 mm)
clearance can be used when the bottom of the wood
or metal cabinet is protected by not less than 1/4''
(6 mm) of a flame retardant material covered with not
less than No. 28 MSG sheet steel, 0.015'' (0.38 mm)
thick stainless steel, 0.024'' (0.61 mm) aluminum, or
0.02'' (0.51 mm) thick copper.
•
DO NOT
obstruct the flow of combustion and
ventilation air to the appliance.
•
The appliance height is adjustable. The level of the
range top must be at the same level or above the
counter top level.
•
To provide proper ventilation of the range
DO NOT
remove range feet.
•
Any openings in the wall behind the appliance and in
the floor under the appliance must be sealed.
Rear clearance requirements
•
To avoid staining on the back wall, high temperature,
non-porous construction materials suitable for use in a
cooking environment are recommended.
•
Model PCG305xx, PRG305xx, PRG304xx, PRD305xx,
PRD304, and PRD606xx are suitable for 0'' rear
clearance to combustible surfaces.
•
All other models:
•
When using the included island trim a minimum 6"
(152 mm)* rear clearance is required to a
combustible surface*.
•
When installing against a combustible surface, a
Thermador
®
low backguard is required for a 0''
rear clearance to the combustible surface. A
Thermador low backguard must be purchased
separately.
•
A rear clearance to a surface covered in a non-
combustible material (metal, ceramic tile, brick,
marble, or stone)
*
is 0" when using the included
Island Trim.
*Clearances of less than 6'' (152 mm) should be approved by the
local codes and/or by the local authority having jurisdiction.
Clearances from non-combustible materials are not part of the
ANSI Z21.1 scope and are not certified by CSA.
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