Installation Instructions

8
Planning Information
Plan where the duct work will be located. Install
proper-sized duct work, roof, or wall cap for the type
of blower you are using. Adjust your measurements
for various heights of ceilings, soffits, cabinets, or
ranges/rangetops.
Proper installation of ducting is extremely
important to ensure maximum performance from
any ventilation product.
• All CFMs are based on tests at 0.1 static pressure:
without applying static pressure, CFM would be greatly
overstated.
• Straight runs and gradual turns are best; for example,
each 90º elbow is equivalent to 5-10 feet (1.52-3.05 m)
of straight run.
• Never use flexible duct; it creates back pressure/air
turbulence and greatly reduces performance.
• Proper performance is dependent on proper ducting;
make sure that a qualified and trained installer is used.
• Check with a qualified and trained installer or local
codes for makeup air requirement, if any.
• Max. amp rating for hoods includes recommended
ventilator kit rating; all products must be hard wired
direct with 2-wire with ground.
Check Framing
NOTE: Because of the weight of the hood make sure that the
mounting screws are driven into the framing and not just the
drywall. It may be necessary to drill additional holes in the
canopy for proper alignment. Some hoods require a locally
supplied wood strip for mounting. Check installation
procedure of your hood on page 10 to determine if a wood
strip is required.
Electrical Supply
Run 120 VAC electrical wiring from service panel to
installation location. See specification pages for the
maximum amp requirements.
Roof cap
7” round duct
Duct cover or soffit
300 or 600 CFM
single blower
interior-power
typical ductwor
k
Hood
Roof cap
10” round duct
Duct cover or soffit
1200 CFM
single blower
interior power
typical ductwor
k
Hood
Exterior blower
10” round duct
Duct cover or soffit
900, 1200, or
1500 CFM
exterior power
typical ductwor
k
Hood
Duct
Duct cover or soffit
Wall installation
exterior power
typical ductwork
NOTE: Wall exhaust must be a minimum of 24” (61.0 cm)
from ground. This may vary depending on local codes
and geogra
p
hic location.
Hood
Wall cap