
Installation – Mounting Height & Clearance
6
DUCTING
A minimum of 6” round duct must be used to
maintain maximum air ow eciency.
Always use rigid type metal ducts only. Flexible
ducts could restrict air ow by up to 50%.
Use calculation worksheet to compute total duct
work (Page 5).
ALWAYS, when possible, reduce the number of
transitions and turns. If a long duct run is required,
increase duct size from 6” to 7” or 8”.
If turns or transitions are required: Install as far
away from duct opening and as far apart between
the two transitions as possible.
Minimum mount height between range top to hood
bottom should be no less than 24”.
Maximum mount height should be no higher than
34”.
It is important to install the hood at the proper
mounting height. Hoods mounted too low could
result in heat damage and re hazard; while hoods
mounted too high will be hard to reach and will
loose performance and eciency.
If available, also refer to range manufacturer’s
height clearance requirements and recommended
hood mounting height above range. Always check
your local codes for any dierences.
Duct cover extension kit available for ceiling
heights up to 12 feet. Turn to page 20 for part
number and ordering information.
DAMAGE-SHIPMENT / INSTALLATION:
• Please fully inspect unit for damage before
installation.
• If the unit is damaged in shipment, return the
unit to the store in which it was bought for
repair or replacement.
• If the unit is damaged by the customer, repair
or replacement is the responsibility of the
customer.
• If the unit is damaged by the installer (if other
than the customer), repair of replacement must
be made by arrangement between customer
24” min.
34” max.
min. A
min. B
max. C
min. D
min. E
max. F
Standard Extension
Hood Heights Duct Cover Duct Cover
minimum ducted (A) 26” 41“
minimum recirculating (B) 31” 45-1/2“
maximum (C) 49” 78-1/2”
Ceiling Heights
minimum ducted (D) 86” 101“
minimum recirculating (E) 91” 105-1/2“
maximum (F) 119” 148-1/2”
36”
Standard Extension
Hood Heights Duct Cover Duct Cover
minimum ducted (A) 27” 43“
minimum recirculating (B) 31” 47“
maximum (C) 48” 81”
Ceiling Heights
minimum ducted (D) 87” 103“
minimum recirculating (E) 91” 107“
maximum (F) 118” 151”
RH008
RH009
Standard Extension
Hood Heights Duct Cover Duct Cover
minimum ducted (A) 27-1/2” 46-1/2“
minimum recirculating (B) 32” 50-1/2“
maximum (C) 42-1/2” 80”
Ceiling Heights
minimum ducted (D) 87-1/2” 106-1/2“
minimum recirculating (E) 92” 110-1/2“
maximum (F) 104-1/2” 150”
RH006