Zephyr ZMI-M90AS - Manual (Page 8)

Installation –
Mounting Height & Clearance
6
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DUCTING
A minimum of 6” round duct must be used to
maintain maximum air fl ow effi ciency.
Always use rigid type metal ducts only. Flexible
ducts could restrict air fl 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 28”.
Maximum mount height should be no higher than
36”.
It is important to install the hood at the proper
mounting height. Hoods mounted too low could
result in heat damage and fi re hazard; while hoods
mounted too high will be hard to reach and will
loose its performance and effi ciency.
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 differences.
Minimum Mounting Height (Ducted)
7’7”. Hood mounted 28” above cooking surface;
64” from fl oor.
Minimum Mounting Height (Recirculating)
7’10”. Hood mounted 28” above cooking
surface; 64” from fl oor.
Maxmimum Mounting Height
10’1”. Hood mounted 36” above cooking surface;
72” from fl oor.
Duct cover extension kit available for ceiling
heights up to 14 feet. Turn to page 17 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
and installer.
36”
* Min 91”
Max 121”
* The min ceiling height is 94” for recirculating option
Min. ducted 26-1/2”
Min. recirc. 30”
Max. 49”