Installation guide
Installation – Mounting Height & Clearance
6
www.zephyronline.com
DUCTING
A minimum of 6” round or 3-1/4 x 10” rectangular 
duct must be used to maintain maximum air  ow 
ef  ciency.
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.
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 opening and as far apart, between 2, 
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   re hazard; while hoods 
mounted too high will be hard to reach and will 
loose its performance and ef  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)
8’. Hood mounted 28” above cooking surface; 
64” from  oor. 
Minimum Mounting Height (Recirculating)
8’4”. Hood mounted 28” above cooking surface;  
64” from  oor.
Maxmimum Mounting Height
10’3”. Hood mounted 36” above cooking surface; 
72” from  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.
 min. ducted 32-1/2” 
 min. recirc. 36“ 
 max. 51”
min. 28” 
max. 36”
36”
Note: Top duct cover with louver holes may be flipped upside down to hide louvers.
min. ducted  96” 
min. recirc. 100” 
max. 123” 










